This document discusses approaches for dividing flow units in continental reservoirs. It begins by defining flow units as reservoir units that have similar permeability characteristics that influence fluid flow. The document then analyzes the basic features of continental reservoir flow units. As a case study, it divides the flow units in a pilot site in the Daqing oil field in China based on geological factors like faults, lithology, and sedimentary features. Specifically, it subdivides existing layers into 18 vertical flow units and categorizes the units into four types - I to IV - based on their permeability and storage capacity. The division of flow units aims to better understand reservoir heterogeneity and the distribution of remaining oil.
This document summarizes reservoir evaluation of several oil blocks in the X Oilfield. It analyzes 3D seismic data to understand the structural patterns, recognizes sand body distribution through dense well data, and analyzes well testing, oil testing and logging data to understand oil-water distribution. The key findings are:
- The main reservoirs are fault-lithologic with sand bodies distributed in patchy, strip and lenticular shapes.
- Sedimentary facies include channel, interchannel, natural levee and crevasse splay deposits.
- Oil-water distribution is controlled by structure and lithology, with upper oil, lower water typically.
- Initial production intensity is estimated at 0.2 tons per
1) The document analyzes oil-water layer recognition and distribution of PI reservoirs in the G region based on core data, oil testing, and well logging.
2) An oil-water layer logging interpretation chart is established using resistivity logs to identify 5 types of vertical oil-water distributions in single wells and the overall horizontal zoning of distributions across the region.
3) The distributions are complex due to structural, sedimentary, and diagenetic factors but generally include pure oil, oil-water, and pure water layers that vary based on position within anticlines, synclines, and slopes.
1) The distribution of oil and water in the study area can be categorized into three types: normal structural distribution with oil above water, water blocking between fault blocks, and anomalous distribution with water above oil within the same fault block.
2) Faults, sedimentary facies, and distance from the source rock influence the complex oil-water distribution.
3) Analyzing the distribution patterns guided new well placement in higher structural positions and better reservoir facies, increasing the oil drilling success rate.
2014 a method for evaluation of water flooding performance in fractured res...AliMukhtar24
This document presents a new mathematical model for evaluating water flooding performance in fractured reservoirs. The model transforms a dual-porosity reservoir into an equivalent single-porosity model using a pseudo relative permeability method. This allows fractures and matrix to each have their own permeability, porosity, saturation, and relative permeability parameters. The model also accounts for imbibition effects by modifying an existing equation. The investigation shows imbibition can impact recovery and lower production rates can improve water flooding by delaying breakthrough and controlling water cut rise. A new chart is proposed to estimate ultimate recovery based on water cut versus recovery curves. The model is shown to estimate recovery within 2% of simulation results for two reservoirs, proving it a reliable evaluation method.
The document provides an overview of the roles and responsibilities of an Operations Geologist. It describes how an Operations Geologist must conduct geological planning for wells, including risk analysis and data acquisition programs. During well execution, the geologist monitors coring, wireline logging, and pore pressure evaluation. Post-well duties include end of well reporting, data distribution, and archiving. The modern role of the Operations Geologist involves well planning, monitoring well execution, and reporting on end-of-well activities.
DSD-INT 2019 Modelling Human Interventions and Salt Marsh Dynamics in the Wad...Deltares
Presentation by Rutger Siemes, HKV Lijn in Water BV, The Netherlands, at the Delft3D and XBeach User Day: Coastal morphodynamics, during Delft Software Days - Edition 2019. Wednesday, 13 November 2019, Delft.
This document provides an overview of petrophysics and core analysis methods. Petrophysics is the study of physical and chemical rock properties and their interaction with fluids. Key properties include lithology, porosity, water saturation, and permeability. These properties are measured through well logs, core analysis, and seismic data. Core analysis involves taking rock samples from wells and measuring properties like porosity and permeability on plugs taken from the core. The fluid content of cores can indicate hydrocarbon saturation but is altered during retrieval. Routine core analysis involves testing plugs taken along the entire reservoir section.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
This document summarizes reservoir evaluation of several oil blocks in the X Oilfield. It analyzes 3D seismic data to understand the structural patterns, recognizes sand body distribution through dense well data, and analyzes well testing, oil testing and logging data to understand oil-water distribution. The key findings are:
- The main reservoirs are fault-lithologic with sand bodies distributed in patchy, strip and lenticular shapes.
- Sedimentary facies include channel, interchannel, natural levee and crevasse splay deposits.
- Oil-water distribution is controlled by structure and lithology, with upper oil, lower water typically.
- Initial production intensity is estimated at 0.2 tons per
1) The document analyzes oil-water layer recognition and distribution of PI reservoirs in the G region based on core data, oil testing, and well logging.
2) An oil-water layer logging interpretation chart is established using resistivity logs to identify 5 types of vertical oil-water distributions in single wells and the overall horizontal zoning of distributions across the region.
3) The distributions are complex due to structural, sedimentary, and diagenetic factors but generally include pure oil, oil-water, and pure water layers that vary based on position within anticlines, synclines, and slopes.
1) The distribution of oil and water in the study area can be categorized into three types: normal structural distribution with oil above water, water blocking between fault blocks, and anomalous distribution with water above oil within the same fault block.
2) Faults, sedimentary facies, and distance from the source rock influence the complex oil-water distribution.
3) Analyzing the distribution patterns guided new well placement in higher structural positions and better reservoir facies, increasing the oil drilling success rate.
2014 a method for evaluation of water flooding performance in fractured res...AliMukhtar24
This document presents a new mathematical model for evaluating water flooding performance in fractured reservoirs. The model transforms a dual-porosity reservoir into an equivalent single-porosity model using a pseudo relative permeability method. This allows fractures and matrix to each have their own permeability, porosity, saturation, and relative permeability parameters. The model also accounts for imbibition effects by modifying an existing equation. The investigation shows imbibition can impact recovery and lower production rates can improve water flooding by delaying breakthrough and controlling water cut rise. A new chart is proposed to estimate ultimate recovery based on water cut versus recovery curves. The model is shown to estimate recovery within 2% of simulation results for two reservoirs, proving it a reliable evaluation method.
The document provides an overview of the roles and responsibilities of an Operations Geologist. It describes how an Operations Geologist must conduct geological planning for wells, including risk analysis and data acquisition programs. During well execution, the geologist monitors coring, wireline logging, and pore pressure evaluation. Post-well duties include end of well reporting, data distribution, and archiving. The modern role of the Operations Geologist involves well planning, monitoring well execution, and reporting on end-of-well activities.
DSD-INT 2019 Modelling Human Interventions and Salt Marsh Dynamics in the Wad...Deltares
Presentation by Rutger Siemes, HKV Lijn in Water BV, The Netherlands, at the Delft3D and XBeach User Day: Coastal morphodynamics, during Delft Software Days - Edition 2019. Wednesday, 13 November 2019, Delft.
This document provides an overview of petrophysics and core analysis methods. Petrophysics is the study of physical and chemical rock properties and their interaction with fluids. Key properties include lithology, porosity, water saturation, and permeability. These properties are measured through well logs, core analysis, and seismic data. Core analysis involves taking rock samples from wells and measuring properties like porosity and permeability on plugs taken from the core. The fluid content of cores can indicate hydrocarbon saturation but is altered during retrieval. Routine core analysis involves testing plugs taken along the entire reservoir section.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
This document discusses variations of the interval linear assignment problem. It begins with an introduction to assignment problems and defines them as problems that assign resources to activities to minimize cost or maximize profit on a one-to-one basis. It then provides the mathematical model for standard assignment problems and discusses variations such as non-square matrices, maximization/minimization objectives, constrained assignments, and alternate optimal solutions. The document also gives examples of managerial applications and provides two numerical examples solving interval linear assignment problems using an interval Hungarian method.
This document numerically models the strength of hull form components for a 700-tonne self-propelled barge under moment and operational loading. It calculates the barge's dimensions, structural members, and their masses. A numerical program was used to check the results and calculate the barge's transverse, longitudinal, and vertical centers of gravity. The still water and wave bending moments were modeled to determine the maximum bending stress of 83.33MN/m2 and wave bending moment of 18.846MNm the barge could withstand during operations. The results showed the barge would have sufficient mechanical strength and stability to withstand stresses arising during operations.
Este documento fornece sugestões para ensinar sobre complementos oblíquos na sala de aula. Ele explica que complementos oblíquos são grupos preposicionais ou adverbiais que completam o sentido de um verbo, mas não podem ser substituídos por pronomes. O documento guia os alunos a identificar complementos oblíquos em frases e distinguí-los de complementos diretos e indiretos.
Este documento describe los diferentes tipos de sistemas fluviales, incluyendo ríos, torrentes, aguas salvajes, glaciares y aguas subterráneas. Explica los procesos de granoselección que reducen el tamaño de los materiales transportados a lo largo de los ríos desde su cabecera hasta su desembocadura, así como las características de cada uno de estos sistemas fluviales.
Rangkuman dokumen tersebut memberikan informasi tentang rancangan pelajaran tahunan untuk pendidikan jasmani dan kesihatan untuk murid tingkatan 6 yang mencakupi 3 elemen utama yaitu tunjang kemahiran, hasil pembelajaran, dan aktiviti yang dicadangkan untuk setiap minggu pelajaran.
This document summarizes a study on the effect of soaking on the California Bearing Ratio (CBR) of lateritic soils along the Ibadan-Oyo highway in Nigeria. Samples were taken from two locations and tested for various geotechnical properties before and after soaking. The results showed significant decreases in CBR of up to 78% after soaking, even with small increases in moisture content. The document concludes that adequate drainage systems must be designed for highways using these soils to prevent water ingress and maintain soil strength. Samples from one location had better properties and were used to stabilize weaker samples from the other location, but soaking still greatly reduced the CBR of all soils.
The document summarizes a study that assessed breastfeeding among 120 postpartum women using the LATCH assessment tool. The study found that over half (53.33%) of women had a moderate LATCH score. It also found a significant relationship between women's ages and their LATCH scores. The document provides background on the importance of breastfeeding and describes the methodology and results of the study in more detail.
This document discusses the importance of communication skills in human resource acquisition processes. It begins by outlining how communication is vital for corporate success and professional development. It then describes how HR acquisition trends have shifted over time from solely evaluating core knowledge to also assessing behavioral attributes and communication abilities. Key issues in current HR acquisition processes are identified as properly matching candidates to jobs, managing acquisition costs, developing uniform procedures, preventing talent dilution, acquiring non-core skills, and taking a deliverable approach. Effective communication skills are argued to be an essential yet often lacking component of candidate employability.
Este documento resume los conceptos básicos de la gramática española. Explica que la comunicación implica un emisor, receptor y mensaje, y que el lenguaje es el sistema de comunicación más utilizado por las personas. Describe las diferentes partes de la oración como sustantivos, adjetivos, verbos y pronombres, y explica sus características. También cubre temas como la conjugación verbal, tiempos, modos y clases de verbos.
New Study on Reservoir Characteristics of the Macroscopic Heterogeneity-Examp...iosrjce
The heterogeneity of the reservoir refers to the basic properties of the reservoir (lithology, physical
property, electric property and oiliness) in three dimensional space on the distribution of heterogeneity. Based
on statistics of core and well log data, paramenters of variation coefficient and differential are calculated to
carry out the study on heterogeneity of layer, interlayer and areal heterogeneity of Lower Member of
Minghuazhen Formation in BZ25-1S area. The sand sets of BZ25-1S reservoir are mainly of distributary
channel sand bodiesin delta plain, and the layer heterogeneity is medium. There are many barriers developed,
and layer heterogeneity is relatively strong. In the plane,the reservoir heterogeneity in the distributary channel
is strong, and it is weak in the overbank sand. It is considered that Lower Member of Minghuazhen Formation
in BZ25-1S area is of strong heterogeneity.
The document summarizes the reservoir characteristics of the Putaohua reservoir in the Gulong oilfield. It finds that the reservoir has low textural maturity but good structural maturity, with fine-grained sandstone being the dominant lithology. Physical property analysis shows the reservoir has moderate-low porosity averaging 15% and low permeability averaging 16.3mD. Study of clay mineral transformation indicates the reservoir experienced significant diagenesis during the middle diagenetic stage, which released acids and enhanced secondary porosity development. Lithology, sedimentary environment, and diagenesis are identified as the key controlling factors of the reservoir's physical properties.
This document analyzes the adaptability of the well pattern to the reservoir in the Bozhong 25-1 South oil field in the lower member of the Minghuazhen group. It examines the relationship between the width of channel sand bodies and the layer well spacing. The analysis finds that the current layer well spacing of 400m, 500m, 600m can only control 15.5% of the total 129 channels, including 75% of class I channels and 14.47% of class II channels. Most channels, including class I, II, and III, remain uncontrollable by the existing well pattern. This indicates significant potential for further development that is not being exploited by the current well spacing.
The document discusses research on the distribution of oil and water in the eastern block of the Chao202-2 area in China. It establishes standards for identifying oil, poor oil, dry, and water layers using well logging data. Analysis shows structural reservoirs are dominant and fault and sand body configuration control oil-water distribution. Oil-water distribution varies between fault blocks from "up oil, bottom water" to "up water, bottom oil" depending on structure and sand body development.
This document discusses fluid flow through fractures in rocks. It begins with an introduction to fractured reservoirs and the different flow regimes that can occur. It then discusses fluid flow through porous media and fractured reservoirs specifically. The document outlines several conceptual models for describing fluid flow in fractured porous media, including the explicit discrete fracture model, dual-continuum model, and discrete fracture network model. It also discusses statistical models for fractures and the limitations of conventional reservoir simulation methods in accounting for complex fracture geometries. The document concludes with an overview of mathematical modeling approaches for fluid flow through fractures.
This document analyzes methods for classifying tight oil reservoirs in the Qijia area based on pore structure characteristics. It establishes reservoir classification plates using both physical parameters of porosity and permeability as well as mercury injection data-derived parameters. The classification divides reservoirs into four types based on intersections of porosity with either permeability or a "mercury index" that considers multiple pore structure metrics. The classification standards are then verified against production testing data, showing over 88% consistency, demonstrating the effective application of this pore structure-based reservoir evaluation method.
Macro heterogeneity of high porosity and permeability reservoirin Bozhong 25-...iosrjce
IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of Applied Geology and Geophysics. The journal welcomes publications of high quality papers on theoretical developments and practical applications in Applied Geology and Geophysics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
The document discusses methods for identifying fluids in tight reservoirs, which have low porosity and permeability. It first reviews definitions of tight oil and gas reservoirs and factors that make fluid identification challenging, such as complex pore structure and formation water salinity. It then summarizes several methods used for fluid identification, including NMR to identify gas-water layers, analyzing travel time differences between compressional and shear waves, using cross-plots of well log curves, and time-lapse logging to monitor changes as mud filtrate invades the formation. The document concludes that integrating acoustic, density, and neutron logs with resistivity comparisons and NMR can help qualitatively identify fluids in gas-bearing tight reservoirs.
Hydraulic Flow Unit Characterization in Sandstone Reservoirs, Niger Delta, Nigeria
Hydrogeological-geotechnical Characterization and Analysis for Construction of a Subsurface Reservoir at a Coastal Site in the Nakdong Deltaic Plain, Busan, South Korea
Taxonomical Consideration, Phylogeny and Paleobiogeography of Some Argentinian Ypresian Benthic Foraminiferal Species
Curie Depth and Surface Heat Flow Estimation from Anomalous Magnetic Blocks in the Lower and Part of Middle Benue Trough and Anambra Basin
On the Millennial-scale Variability in Climate of the Northern Hemisphere
Main Mechanisms of Celestial Bodies Negative Polarization Formation: A Review
The Problem of CO2 Reabsorption in Emission Spectra
Uncovering the Secrets of the Gas Giant
1. The document establishes a high-resolution sequence stratigraphic framework for the Putaohua Reservoir in the Puxi Oil Field based on core data, well logs, and seismic data.
2. The reservoir was divided into 2 middle-term base-level cycles, 11 short-term cycles, and 15 super-short term cycles. Correlations between wells were conducted using marker beds, balance thickness methods, and fault patterns.
3. Sedimentary facies maps and reservoir profiles were used to verify the accuracy of the established isochronous stratigraphic framework, providing a strong geological basis for late-stage oil field development.
Study of Seismic Analysis of Water Tank at Ground LevelIRJET Journal
The document discusses the seismic analysis of ground-supported water tanks. It presents the results of analyzing water tanks of varying capacities and dimensions using a spring-mass model. The key findings are:
1) As the ratio of water height to tank diameter (h/D ratio) increases, the impulsive mass fraction increases and convective mass fraction decreases. Higher h/D ratios also result in higher base shear, bending moment, and hydrodynamic pressures.
2) For tanks of constant diameter, increases in capacity/water height lead to higher impulsive forces, base shear, bending moment, hydrodynamic pressures, and sloshing wave heights.
3) In general, seismic forces on the tank increase
This document discusses variations of the interval linear assignment problem. It begins with an introduction to assignment problems and defines them as problems that assign resources to activities to minimize cost or maximize profit on a one-to-one basis. It then provides the mathematical model for standard assignment problems and discusses variations such as non-square matrices, maximization/minimization objectives, constrained assignments, and alternate optimal solutions. The document also gives examples of managerial applications and provides two numerical examples solving interval linear assignment problems using an interval Hungarian method.
This document numerically models the strength of hull form components for a 700-tonne self-propelled barge under moment and operational loading. It calculates the barge's dimensions, structural members, and their masses. A numerical program was used to check the results and calculate the barge's transverse, longitudinal, and vertical centers of gravity. The still water and wave bending moments were modeled to determine the maximum bending stress of 83.33MN/m2 and wave bending moment of 18.846MNm the barge could withstand during operations. The results showed the barge would have sufficient mechanical strength and stability to withstand stresses arising during operations.
Este documento fornece sugestões para ensinar sobre complementos oblíquos na sala de aula. Ele explica que complementos oblíquos são grupos preposicionais ou adverbiais que completam o sentido de um verbo, mas não podem ser substituídos por pronomes. O documento guia os alunos a identificar complementos oblíquos em frases e distinguí-los de complementos diretos e indiretos.
Este documento describe los diferentes tipos de sistemas fluviales, incluyendo ríos, torrentes, aguas salvajes, glaciares y aguas subterráneas. Explica los procesos de granoselección que reducen el tamaño de los materiales transportados a lo largo de los ríos desde su cabecera hasta su desembocadura, así como las características de cada uno de estos sistemas fluviales.
Rangkuman dokumen tersebut memberikan informasi tentang rancangan pelajaran tahunan untuk pendidikan jasmani dan kesihatan untuk murid tingkatan 6 yang mencakupi 3 elemen utama yaitu tunjang kemahiran, hasil pembelajaran, dan aktiviti yang dicadangkan untuk setiap minggu pelajaran.
This document summarizes a study on the effect of soaking on the California Bearing Ratio (CBR) of lateritic soils along the Ibadan-Oyo highway in Nigeria. Samples were taken from two locations and tested for various geotechnical properties before and after soaking. The results showed significant decreases in CBR of up to 78% after soaking, even with small increases in moisture content. The document concludes that adequate drainage systems must be designed for highways using these soils to prevent water ingress and maintain soil strength. Samples from one location had better properties and were used to stabilize weaker samples from the other location, but soaking still greatly reduced the CBR of all soils.
The document summarizes a study that assessed breastfeeding among 120 postpartum women using the LATCH assessment tool. The study found that over half (53.33%) of women had a moderate LATCH score. It also found a significant relationship between women's ages and their LATCH scores. The document provides background on the importance of breastfeeding and describes the methodology and results of the study in more detail.
This document discusses the importance of communication skills in human resource acquisition processes. It begins by outlining how communication is vital for corporate success and professional development. It then describes how HR acquisition trends have shifted over time from solely evaluating core knowledge to also assessing behavioral attributes and communication abilities. Key issues in current HR acquisition processes are identified as properly matching candidates to jobs, managing acquisition costs, developing uniform procedures, preventing talent dilution, acquiring non-core skills, and taking a deliverable approach. Effective communication skills are argued to be an essential yet often lacking component of candidate employability.
Este documento resume los conceptos básicos de la gramática española. Explica que la comunicación implica un emisor, receptor y mensaje, y que el lenguaje es el sistema de comunicación más utilizado por las personas. Describe las diferentes partes de la oración como sustantivos, adjetivos, verbos y pronombres, y explica sus características. También cubre temas como la conjugación verbal, tiempos, modos y clases de verbos.
New Study on Reservoir Characteristics of the Macroscopic Heterogeneity-Examp...iosrjce
The heterogeneity of the reservoir refers to the basic properties of the reservoir (lithology, physical
property, electric property and oiliness) in three dimensional space on the distribution of heterogeneity. Based
on statistics of core and well log data, paramenters of variation coefficient and differential are calculated to
carry out the study on heterogeneity of layer, interlayer and areal heterogeneity of Lower Member of
Minghuazhen Formation in BZ25-1S area. The sand sets of BZ25-1S reservoir are mainly of distributary
channel sand bodiesin delta plain, and the layer heterogeneity is medium. There are many barriers developed,
and layer heterogeneity is relatively strong. In the plane,the reservoir heterogeneity in the distributary channel
is strong, and it is weak in the overbank sand. It is considered that Lower Member of Minghuazhen Formation
in BZ25-1S area is of strong heterogeneity.
The document summarizes the reservoir characteristics of the Putaohua reservoir in the Gulong oilfield. It finds that the reservoir has low textural maturity but good structural maturity, with fine-grained sandstone being the dominant lithology. Physical property analysis shows the reservoir has moderate-low porosity averaging 15% and low permeability averaging 16.3mD. Study of clay mineral transformation indicates the reservoir experienced significant diagenesis during the middle diagenetic stage, which released acids and enhanced secondary porosity development. Lithology, sedimentary environment, and diagenesis are identified as the key controlling factors of the reservoir's physical properties.
This document analyzes the adaptability of the well pattern to the reservoir in the Bozhong 25-1 South oil field in the lower member of the Minghuazhen group. It examines the relationship between the width of channel sand bodies and the layer well spacing. The analysis finds that the current layer well spacing of 400m, 500m, 600m can only control 15.5% of the total 129 channels, including 75% of class I channels and 14.47% of class II channels. Most channels, including class I, II, and III, remain uncontrollable by the existing well pattern. This indicates significant potential for further development that is not being exploited by the current well spacing.
The document discusses research on the distribution of oil and water in the eastern block of the Chao202-2 area in China. It establishes standards for identifying oil, poor oil, dry, and water layers using well logging data. Analysis shows structural reservoirs are dominant and fault and sand body configuration control oil-water distribution. Oil-water distribution varies between fault blocks from "up oil, bottom water" to "up water, bottom oil" depending on structure and sand body development.
This document discusses fluid flow through fractures in rocks. It begins with an introduction to fractured reservoirs and the different flow regimes that can occur. It then discusses fluid flow through porous media and fractured reservoirs specifically. The document outlines several conceptual models for describing fluid flow in fractured porous media, including the explicit discrete fracture model, dual-continuum model, and discrete fracture network model. It also discusses statistical models for fractures and the limitations of conventional reservoir simulation methods in accounting for complex fracture geometries. The document concludes with an overview of mathematical modeling approaches for fluid flow through fractures.
This document analyzes methods for classifying tight oil reservoirs in the Qijia area based on pore structure characteristics. It establishes reservoir classification plates using both physical parameters of porosity and permeability as well as mercury injection data-derived parameters. The classification divides reservoirs into four types based on intersections of porosity with either permeability or a "mercury index" that considers multiple pore structure metrics. The classification standards are then verified against production testing data, showing over 88% consistency, demonstrating the effective application of this pore structure-based reservoir evaluation method.
Macro heterogeneity of high porosity and permeability reservoirin Bozhong 25-...iosrjce
IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of Applied Geology and Geophysics. The journal welcomes publications of high quality papers on theoretical developments and practical applications in Applied Geology and Geophysics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
The document discusses methods for identifying fluids in tight reservoirs, which have low porosity and permeability. It first reviews definitions of tight oil and gas reservoirs and factors that make fluid identification challenging, such as complex pore structure and formation water salinity. It then summarizes several methods used for fluid identification, including NMR to identify gas-water layers, analyzing travel time differences between compressional and shear waves, using cross-plots of well log curves, and time-lapse logging to monitor changes as mud filtrate invades the formation. The document concludes that integrating acoustic, density, and neutron logs with resistivity comparisons and NMR can help qualitatively identify fluids in gas-bearing tight reservoirs.
Hydraulic Flow Unit Characterization in Sandstone Reservoirs, Niger Delta, Nigeria
Hydrogeological-geotechnical Characterization and Analysis for Construction of a Subsurface Reservoir at a Coastal Site in the Nakdong Deltaic Plain, Busan, South Korea
Taxonomical Consideration, Phylogeny and Paleobiogeography of Some Argentinian Ypresian Benthic Foraminiferal Species
Curie Depth and Surface Heat Flow Estimation from Anomalous Magnetic Blocks in the Lower and Part of Middle Benue Trough and Anambra Basin
On the Millennial-scale Variability in Climate of the Northern Hemisphere
Main Mechanisms of Celestial Bodies Negative Polarization Formation: A Review
The Problem of CO2 Reabsorption in Emission Spectra
Uncovering the Secrets of the Gas Giant
1. The document establishes a high-resolution sequence stratigraphic framework for the Putaohua Reservoir in the Puxi Oil Field based on core data, well logs, and seismic data.
2. The reservoir was divided into 2 middle-term base-level cycles, 11 short-term cycles, and 15 super-short term cycles. Correlations between wells were conducted using marker beds, balance thickness methods, and fault patterns.
3. Sedimentary facies maps and reservoir profiles were used to verify the accuracy of the established isochronous stratigraphic framework, providing a strong geological basis for late-stage oil field development.
Study of Seismic Analysis of Water Tank at Ground LevelIRJET Journal
The document discusses the seismic analysis of ground-supported water tanks. It presents the results of analyzing water tanks of varying capacities and dimensions using a spring-mass model. The key findings are:
1) As the ratio of water height to tank diameter (h/D ratio) increases, the impulsive mass fraction increases and convective mass fraction decreases. Higher h/D ratios also result in higher base shear, bending moment, and hydrodynamic pressures.
2) For tanks of constant diameter, increases in capacity/water height lead to higher impulsive forces, base shear, bending moment, hydrodynamic pressures, and sloshing wave heights.
3) In general, seismic forces on the tank increase
Determination of Effect Bentonite and Additives On Drilling FluidsIRJESJOURNAL
Abstract :- Drilling fluids Play a vital role in hole Cleaning suspension of cuttings, prevent caving, and ensure the tightness of the well wall. Moreover they also help in cooling and lubricating the drilling tool, transfer the hydraulic power and carry information about the nature of the drilled formation by raising the cuttings from the bottom to the surface, using a simple mixture of water and clays, to complex mixtures of various specific organic and inorganic products as additives. These additives improve fluid rheological properties and filtration capability, allowing bits to penetrate heterogeneous geological formations The mud used in this work is barite and bentonites at different samples to know the difference in their specific gravity, viscosity, surface tension, and pH of the samples when chemical additives are added.
This document provides an overview of the course "Applied Hydrology" at Wollega University. The course is part of the Master of Science program in Hydraulic Engineering. It covers key topics in hydrology including the hydrologic cycle, hydrologic abstractions, infiltration, evaporation, and hydrologic measurements. Engineering applications of hydrology principles are also discussed such as design of irrigation systems, dams, and flood control projects.
1. The document discusses applying cloud transformation technology to predict reservoir properties like porosity and permeability in thin reservoirs in the Songliao basin. Cloud transformation can minimize fitting errors between non-linear relationships of reservoir parameters better than conventional linear or quadratic functions.
2. The technique was applied to a study area in Mutou, Songliao basin to predict porosity distributions based on relationships defined through cloud transformation between lithology, wave impedance, and porosity. Results showed porosity simulations were consistent vertically and horizontally and matched over 80% of drilling data.
3. Cloud transformation provides a scientific method for reservoir property prediction that considers the range of possible values as a probability distribution rather than point values, improving on conventional
This document presents a saturation computation model and parameter determination methods for low permeability reservoirs with high mud content. It derives a formula for water saturation that fits field-scale development based on the classic Archie formula. It also establishes methods for obtaining parameter values related to formation depth and porosity using geochemical field theory and classification statistics. The model achieved a relative error of 5.38% compared to actual core data, indicating it has guiding significance for scale development in such reservoirs.
1) The document describes the creation of 3D geological models for the North NO.1 area off the west and west block of the Daqing Oilfield using Petrel modeling software.
2) Structural, sedimentary facies, and attribute models were developed based on geological, seismic, and well log data to characterize the reservoir's spatial geological characteristics.
3) The models included 20 sedimentary facies units and models of porosity, permeability, and effective thickness to represent the heterogeneity of the reservoir and provide a basis for improving residual oil recovery.
Reservoir engineering functions include determining hydrocarbon reserves and production rates. A reservoir engineer's role includes reserves estimation, development planning, and production optimization. Reserves are classified as proven or unproven. Reservoir properties like porosity and permeability control production potential. Porosity is measured from logs or cores, and permeability is measured from cores, well tests, or logs. Relative permeability curves describe fluid flow at partial saturations. Wettability and capillary pressure also impact fluid distribution and flow.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
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Application of time lapse (4 d) seismic for petroleum reservoir monitoring an...Alexander Decker
This document summarizes the application of time lapse (4D) seismic technology for monitoring petroleum reservoirs. 4D seismic involves acquiring 3D seismic surveys at different times over a producing reservoir to detect changes related to production. Case studies from various fields demonstrate benefits like optimizing injection profiles, identifying bypassed oil, and improving well placement. The Gullfaks field case study showed 4D seismic helped identify two previously undiscovered oil-bearing compartments and led to additional oil production. Overall, 4D seismic provides valuable insights into reservoir fluid behavior that can increase oil recovery rates.
The document describes the establishment of a fine sequence stratigraphic framework for the Fuyu reservoir in the Zhou13 Block of the Zhaozhou Oilfield. First, a standard well, Zhou 801, was selected based on characteristics like complete formation, lack of faults, and clear stratigraphic cycles. Marker beds were identified from clear electrical properties. The reservoir was then divided into three groups (FI, FII, FIII) and seventeen small layers based on the marker beds and cycles in the standard well. Correlation was then performed between the standard well and other wells in the block to construct a unified stratigraphic framework.
This document proposes methods for generating electricity from speed breakers. It discusses 5 classifications of speed breaker power generators that use different mechanisms: 1) a chain drive mechanism, 2) a rack and pinion system, 3) direct use of the load through a reciprocating device, 4) a translator and stator topology, and 5) a pressure lever mechanism. The document also outlines the advantages of using speed breakers for power generation such as low cost and maintenance and being a renewable source. Some challenges are also noted such as selecting a suitable generator and dealing with rain damage.
Cassava waste water was used as an admixture to replace distilled water in ratios of 5%, 10%, 15%, and 20% for producing sandcrete blocks. 60 sandcrete blocks of size 450mm x 150mm x 225mm were produced with different admixture ratios and a control with 0% admixture. The blocks were cured for 7, 14, 21, and 28 days and then tested for moisture content, specific gravity, water absorption, and compressive strength. Test results showed that blocks with 20% cassava waste water admixture met the minimum compressive strength requirement of 3.30 N/mm2 set by Nigerian standards, indicating the potential of cassava waste water to improve sandcrete block quality and
The document presents a theorem on random fixed points in metric spaces. It begins with introductions to fixed point theory, random fixed point theory, and relevant definitions. The main result is Theorem 3.1, which proves that if a self-mapping E on a complete metric space X satisfies certain contraction conditions involving parameters between 0 and 1, then E has a unique fixed point. The proof constructs a Cauchy sequence that converges to the unique fixed point. The document contributes to the study of random equations and random fixed point theory, which has applications in nonlinear analysis, probability theory, and other fields.
1. The document discusses applying multi-curve reconstruction technology to seismic inversion to improve accuracy and reliability. It focuses on reconstructing SP and RMN curves from well logs that are affected by various distortions.
2. The process of reconstructing the curves involves removing baseline drift, standardizing values, applying linear filtering, and fitting the curves. This removes interference and retains valid lithological information.
3. Reconstructing high quality curves improves the resolution and credibility of seismic inversion results. The method is shown to effectively predict sand distribution with little error.
This document compares the performance of a Minimum-Mean-Square-Error (MMSE) adaptive receiver and a conventional Rake receiver for receiving Ultra-Wideband (UWB) signals over a multipath fading channel. It first describes the UWB pulse shapes and channel model used, including the 6th derivative of the Gaussian pulse and the IEEE 802.15.3a modified Saleh-Valenzuela channel model. It then discusses the Direct-Sequence and Time-Hopping transmission and multiple access schemes for UWB. The document presents the receiver structures for the MMSE adaptive receiver and Rake receiver and compares their performance using MATLAB simulations.
This document summarizes a study on establishing logging interpretation models for reservoir parameters like porosity, permeability, oil saturation, and gas saturation in the Gaotaizi Reservoir of the L Oilfield. Models were developed using core data from 4 wells and include:
1) A porosity model relating acoustic travel time to porosity with an error of 0.92%
2) A permeability model relating permeability to porosity with an error of 0.31%
3) An oil saturation model using resistivity data with empirically determined parameters
4) A method to determine original gas saturation from mercury injection data.
Application of the models improved interpretation precision and allowed recalculation of oil and gas reserves for the
This document discusses predicting spam videos on social media platforms using machine learning. It proposes using attributes like number of likes, comments, and view count to classify videos as spam or not spam. A predictive algorithm is developed that uses threshold values for attributes and natural language processing of comments to classify videos. Testing of the algorithm on a dataset achieved a spam prediction precision of 93.6%. Issues with small datasets decreasing accuracy are also discussed, along with continuing work to address this issue.
1) The study experimentally evaluated the compatibility relationship between polymer solutions and oil layers through core flooding tests with different permeability cores.
2) The results showed that injection rate decreased with increasing polymer concentration and molecular weight, and increased with permeability.
3) Based on the results, boundaries for injection capability were established and a compatibility chart was proposed to guide polymer solution selection for different sedimentary microfacies in the field based on permeability and pore size.
1. The document discusses the identification of lithologic traps in the D3 Member of the Gaonan Region using seismic attribute analysis, acoustic impedance inversion, and sedimentary microfacies analysis.
2. Several lithologic traps were identified in the I and II oil groups of the D3 Member, with the largest trap located between wells G46 and G146X1 covering an area of about 2.35 km2.
3. Impedance inversion, seismic attribute analysis, and sedimentary microfacies characterization using 3D seismic data helped determine the location and development of effective lithologic traps in the thin sandstone-shale interbeds of the target stratum.
This document examines using coal ash as a partial replacement for cement in concrete. Coal ash was substituted for cement at rates of 5%, 10%, and 15% by weight. Testing found that concrete with a 5% substitution of coal ash exhibited only a slight decrease in compressive strength of 2% at 28 days while gaining improved workability. Higher substitution rates of 10% and 15% coal ash led to greater decreases in compressive and tensile strength. The study concludes that a 5% substitution of coal ash for cement provides benefits of reduced cost and improved workability with minimal strength impacts, representing an effective use of a waste material that addresses sustainability.
Accounting professional judgment involves handling accounting events and compiling financial reports according to regulations and standards. However, professional judgment is sometimes manipulated to distort accounting information. The document discusses three ways manipulation occurs: 1) abandoning accounting principles, 2) optional changes to accounting policies, and 3) abuse of accounting estimates. The causes of manipulation include distorted motivations from corporate governance issues and catering to various stakeholder interests. Strengthening supervision and improving the accounting system are proposed to manage manipulation of professional judgment.
The document describes an intelligent fault diagnosis system for reciprocating pumps that uses pressure and flow signals as inputs. It consists of hardware for data acquisition and a software system for signal processing, feature extraction, and fault diagnosis using wavelet neural networks. The system was able to accurately diagnose three main fault types - seal ring faults, valve damage, and spring faults - based on differences observed in the pressure curves. Testing on over 12 samples of each fault type achieved a correct diagnosis rate of over 94%. The system provides a fast and effective means of remotely monitoring reciprocating pumps and identifying faults.
This document discusses the application of meta-learning algorithms in banking sector data mining for fraud detection. It proposes using Classification and Regression Tree (CART), AdaBoost, LogitBoost, Bagging and Dagging algorithms for classification of banking transaction data. The experimental results show that Bagging algorithm has the best performance with the lowest misclassification rate, making it effective for banking fraud detection through data mining. Data mining can help banks detect patterns for applications like credit scoring, payment default prediction, fraud detection and risk management by analyzing customer transaction history and loan details.
This document presents a numerical solution for unsteady heat and mass transfer flow past an infinite vertical plate with variable thermal conductivity, taking into account Dufour number and heat source effects. The governing equations are non-linear and coupled, and were solved numerically using an implicit finite difference scheme. Various parameters, including Dufour number and heat source, were found to influence the velocity, temperature, and concentration profiles. Skin friction, Nusselt number, and Sherwood number were also calculated.
The document discusses methods for obtaining a background image using depth information from a depth camera to more accurately extract foreground objects. It finds that accumulating depth images and taking the median value at each pixel provides the most accurate background image. The accuracy of three methods - average, median, and mode - are evaluated using simulated depth data of a captured plane. The median method provides the best results, followed by average, while mode performs worst. More accumulated images provide a more accurate background image across all methods.
This document presents a mathematical model for determining the minimum overtaking sight distance (OSDm) required for an ascending vehicle to safely pass another slower vehicle on a single lane highway with an incline. It defines sight distance, stopping sight distance, perception-reaction time and derives equations to calculate the reaction distance (d1), overtaking distance (d2), vehicle travel distance during overtaking (d3), and total minimum OSDm based on vehicle characteristics, road geometry, and coefficients of friction. The safe overtaking zone is defined as 3 times the minimum OSDm. The model accounts for effects of slope angle and aims to satisfy laws of mechanics for overtaking maneuvers on inclined two-way single lane highways.
This document discusses a novel technique for better analysis of ice properties using Kalman filtering. It summarizes previous research on sea ice segmentation using SAR imagery and dual polarization techniques. It proposes using an automated SAR algorithm along with Kalman filtering to more accurately detect sea ice properties from RADARSAT1 and RADARSAT2 imagery data. The document reviews techniques for image segmentation, dual polarization, PMA detection, and related work on sea ice classification using statistical ice properties, edge preserving region models, and object extraction methods.
This document summarizes a study on the bioaccumulation of heavy metals in bass fish (Morone Saxatilis) caught at Rodoni Cape in the Adriatic Sea in Albania. Samples of bass fish were collected from five sites and analyzed for mercury, lead, and cadmium levels in their muscles. The concentrations of heavy metals varied between fish and sites but were below international limits for human consumption. While the fish were found to be safe for eating, the study recommends continuous monitoring of metal levels in fish from the area due to various factors that can influence metal uptake over time.
This document discusses optimal maintenance policies for repairable systems with linearly increasing hazard rates. It considers a system with a constant repair rate and predetermined availability requirement. There are two maintenance policies: corrective maintenance only, and preventive maintenance at set time intervals. The goal is to determine the preventive maintenance interval that guarantees the availability requirement at minimum cost. Equations are developed to calculate the availability under each policy and the optimal preventive maintenance interval based on both availability and cost. A numerical example is provided to demonstrate the decision process in determining the optimal policy.
This document analyzes the longitudinal medical costs of hypertensive diseases in Mexico from 2012 to 2050. It calculates probabilities of disease detection, treatment, and death by age and sex using historical Mexican health data. Medical costs are projected under base, optimal, and worse economic growth scenarios. Costs are higher for women and increase significantly after age 50. The maximum number of patients in treatment is between ages 20-29, decreasing until ages 65-69 for men and 60-64 for women before rising again with other age-related illnesses. Hypertensive disease costs are more expensive than diabetes and projected to increase as the population ages.
Infrastructure Challenges in Scaling RAG with Custom AI modelsZilliz
Building Retrieval-Augmented Generation (RAG) systems with open-source and custom AI models is a complex task. This talk explores the challenges in productionizing RAG systems, including retrieval performance, response synthesis, and evaluation. We’ll discuss how to leverage open-source models like text embeddings, language models, and custom fine-tuned models to enhance RAG performance. Additionally, we’ll cover how BentoML can help orchestrate and scale these AI components efficiently, ensuring seamless deployment and management of RAG systems in the cloud.
In the rapidly evolving landscape of technologies, XML continues to play a vital role in structuring, storing, and transporting data across diverse systems. The recent advancements in artificial intelligence (AI) present new methodologies for enhancing XML development workflows, introducing efficiency, automation, and intelligent capabilities. This presentation will outline the scope and perspective of utilizing AI in XML development. The potential benefits and the possible pitfalls will be highlighted, providing a balanced view of the subject.
We will explore the capabilities of AI in understanding XML markup languages and autonomously creating structured XML content. Additionally, we will examine the capacity of AI to enrich plain text with appropriate XML markup. Practical examples and methodological guidelines will be provided to elucidate how AI can be effectively prompted to interpret and generate accurate XML markup.
Further emphasis will be placed on the role of AI in developing XSLT, or schemas such as XSD and Schematron. We will address the techniques and strategies adopted to create prompts for generating code, explaining code, or refactoring the code, and the results achieved.
The discussion will extend to how AI can be used to transform XML content. In particular, the focus will be on the use of AI XPath extension functions in XSLT, Schematron, Schematron Quick Fixes, or for XML content refactoring.
The presentation aims to deliver a comprehensive overview of AI usage in XML development, providing attendees with the necessary knowledge to make informed decisions. Whether you’re at the early stages of adopting AI or considering integrating it in advanced XML development, this presentation will cover all levels of expertise.
By highlighting the potential advantages and challenges of integrating AI with XML development tools and languages, the presentation seeks to inspire thoughtful conversation around the future of XML development. We’ll not only delve into the technical aspects of AI-powered XML development but also discuss practical implications and possible future directions.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
Dr. Sean Tan, Head of Data Science, Changi Airport Group
Discover how Changi Airport Group (CAG) leverages graph technologies and generative AI to revolutionize their search capabilities. This session delves into the unique search needs of CAG’s diverse passengers and customers, showcasing how graph data structures enhance the accuracy and relevance of AI-generated search results, mitigating the risk of “hallucinations” and improving the overall customer journey.
Full-RAG: A modern architecture for hyper-personalizationZilliz
Mike Del Balso, CEO & Co-Founder at Tecton, presents "Full RAG," a novel approach to AI recommendation systems, aiming to push beyond the limitations of traditional models through a deep integration of contextual insights and real-time data, leveraging the Retrieval-Augmented Generation architecture. This talk will outline Full RAG's potential to significantly enhance personalization, address engineering challenges such as data management and model training, and introduce data enrichment with reranking as a key solution. Attendees will gain crucial insights into the importance of hyperpersonalization in AI, the capabilities of Full RAG for advanced personalization, and strategies for managing complex data integrations for deploying cutting-edge AI solutions.
“An Outlook of the Ongoing and Future Relationship between Blockchain Technologies and Process-aware Information Systems.” Invited talk at the joint workshop on Blockchain for Information Systems (BC4IS) and Blockchain for Trusted Data Sharing (B4TDS), co-located with with the 36th International Conference on Advanced Information Systems Engineering (CAiSE), 3 June 2024, Limassol, Cyprus.
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024Neo4j
Neha Bajwa, Vice President of Product Marketing, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
UiPath Test Automation using UiPath Test Suite series, part 5DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 5. In this session, we will cover CI/CD with devops.
Topics covered:
CI/CD with in UiPath
End-to-end overview of CI/CD pipeline with Azure devops
Speaker:
Lyndsey Byblow, Test Suite Sales Engineer @ UiPath, Inc.
TrustArc Webinar - 2024 Global Privacy SurveyTrustArc
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
This webinar will review:
- The top 10 privacy insights from the fifth annual Global Privacy Benchmarks Survey
- The top challenges for privacy leaders, practitioners, and organizations in 2024
- Key themes to consider in developing and maintaining your privacy program
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAUpanagenda
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/
DLAU und die Lizenzen nach dem CCB- und CCX-Modell sind für viele in der HCL-Community seit letztem Jahr ein heißes Thema. Als Notes- oder Domino-Kunde haben Sie vielleicht mit unerwartet hohen Benutzerzahlen und Lizenzgebühren zu kämpfen. Sie fragen sich vielleicht, wie diese neue Art der Lizenzierung funktioniert und welchen Nutzen sie Ihnen bringt. Vor allem wollen Sie sicherlich Ihr Budget einhalten und Kosten sparen, wo immer möglich. Das verstehen wir und wir möchten Ihnen dabei helfen!
Wir erklären Ihnen, wie Sie häufige Konfigurationsprobleme lösen können, die dazu führen können, dass mehr Benutzer gezählt werden als nötig, und wie Sie überflüssige oder ungenutzte Konten identifizieren und entfernen können, um Geld zu sparen. Es gibt auch einige Ansätze, die zu unnötigen Ausgaben führen können, z. B. wenn ein Personendokument anstelle eines Mail-Ins für geteilte Mailboxen verwendet wird. Wir zeigen Ihnen solche Fälle und deren Lösungen. Und natürlich erklären wir Ihnen das neue Lizenzmodell.
Nehmen Sie an diesem Webinar teil, bei dem HCL-Ambassador Marc Thomas und Gastredner Franz Walder Ihnen diese neue Welt näherbringen. Es vermittelt Ihnen die Tools und das Know-how, um den Überblick zu bewahren. Sie werden in der Lage sein, Ihre Kosten durch eine optimierte Domino-Konfiguration zu reduzieren und auch in Zukunft gering zu halten.
Diese Themen werden behandelt
- Reduzierung der Lizenzkosten durch Auffinden und Beheben von Fehlkonfigurationen und überflüssigen Konten
- Wie funktionieren CCB- und CCX-Lizenzen wirklich?
- Verstehen des DLAU-Tools und wie man es am besten nutzt
- Tipps für häufige Problembereiche, wie z. B. Team-Postfächer, Funktions-/Testbenutzer usw.
- Praxisbeispiele und Best Practices zum sofortigen Umsetzen
Best 20 SEO Techniques To Improve Website Visibility In SERPPixlogix Infotech
Boost your website's visibility with proven SEO techniques! Our latest blog dives into essential strategies to enhance your online presence, increase traffic, and rank higher on search engines. From keyword optimization to quality content creation, learn how to make your site stand out in the crowded digital landscape. Discover actionable tips and expert insights to elevate your SEO game.
How to Get CNIC Information System with Paksim Ga.pptxdanishmna97
Pakdata Cf is a groundbreaking system designed to streamline and facilitate access to CNIC information. This innovative platform leverages advanced technology to provide users with efficient and secure access to their CNIC details.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...
E05512631
1. IOSR Journal of Engineering (IOSRJEN) www.iosrjen.org
ISSN (e): 2250-3021, ISSN (p): 2278-8719
Vol. 05, Issue 05 (May. 2015), ||V1|| PP 26-31
International organization of Scientific Research 26 | P a g e
Study on Flow Unit Division Approaches of Continental Reservoir
Liu Jiyu1
, Xing Yu2
, Wang Yinghao3
, Li Borong4
,Yu Zhenyu5
1,2
(Northeast Petroleum University, Daqing Hei Longjiang China)
3
(Ninth oil factory of Daqing oil field, Daqing Hei Longjiang China)
4,5
(First oil factory of Daqing oil field, Daqing Hei Longjiang China)
Abstract: - This paper defines flow unit as the same reservoir unit owning equal percolation characteristics
and argues that flow unit is relative and graded with different scales. After analyzing the basic features of
continental reservoir flow units, this paper divides the flow units of pilot site in the East of the Second Region
in the North of Daqing Saertu Oil Field, according to the geological factors influencing percolation
characteristics.
Keywords: - flow unit, percolation characteristic, reservoir description, reservoir heterogeneity, residual oil
I. INTRODUCTION
Practice in oil and gas field’s exploration and development shows that the key of effective exploration
and development lies in whether the awareness to oil and gas reservoirs is consistent with objective geology
condition. This requires petroleum geology engineers and reservoir engineers to master various parameters and
spatial distribution regularities of oil and gas fields as possible as they can, to build a reservoir geological model
accurately reflecting reservoir heterogeneity of oil and gas reservoir so as to guide its exploration and
development and to improve success rate at exploration stage and recovery efficiency at development stage.
Currently, we are still faced with two difficult questions, how to successfully develop new fields and to further
tap the potential of old oil fields and enhance oil recovery. Research data shows that only relying on secondary
oil recovery, the average recovery ratio is about 35% which still has great potential. It is generally estimated that
20% of the movable oil is due to that the heterogeneity of reservoir hasn’t being affected by water injection [1].
This part of movable oil can be completely mined by deepening understand the heterogeneity of reservoir and
improving secondary recovery technology. The economic benefit of further improving the recovery of mature
oilfields far outweighs that of exploration in remote areas. However, all various adjustment measures taken to
improve the recovery must base on the clear master of remaining oil’s distribution status.
In order to know the distribution of residual oil, it is necessary to start from specific geological
conditions of continental field, to correctly understand the heterogeneity of reservoir and to quantitatively
describe and characterize various parameters of reservoir in three-dimensional, namely, to establish a fine
three-dimensional geological model [2] accurately reflecting structure, deposition, diagenesis, fluid and other
characteristics of the reservoir. During the period of developing the oil field, the task of reservoir description is
to correctly describe the development geological characteristics of the reservoir, which is defined as “all
geological characteristics the reservoirs own to control and influence the process of oil and gas development so
as to affect the develop measures.” Flow unit is the key and basic unit concerning the fine description of future
reservoir [3]. The research on flow unit provides effective means to understand the heterogeneity of reservoir,
being an important development trend and research objectives in future’s reservoir description. Therefore,
2. Study on Flow Unit Division Approaches of Continental Reservoir
International organization of Scientific Research 27 | P a g e
carrying out research on flow units and finding out the distribution of residual oil have great theoretical and
practical significance.
In this paper, the research process is as follows:
1、Purpose and Significance of division of flow unit
2、Concept and basic characteristics of flow unit
3、Flow unit division approaches of continental reservoir and division of flow unit in study area
4、Conclusions and Recommendations
II. CONCEPT AND BASIC CHARACTERISTICS OF FLOW UNIT
2.1 Concept of flow unit
Flow Unit, also known as hydraulic unit, is an emerging reservoir research method in middle and late
1980s. Researchers both as home and abroad, due to different research angles and objects, possess slightly
different understanding and research methods to flow cell. Hearn argues that flow unit is a horizontally and
vertically continuous reservoir stratum, owning similar lithology characteristics in various parts and parallel
petrophysical properties affecting fluid flow [4]; Ebanks considers that flow unit is the rock mass that further
broken down based on the change of geological and physical properties affecting the flow of fluid in rock [5];
Amaefule believes that flow unit is the intervals having similar hydraulic characteristics in given rock [6] and he
thinks that flow unit is the representative base volume affecting fluid flow’s physical properties of reservoir to
be constant and can be distinguished from other rock volume in total rock volume of the reservoir; while Jiao
Yangquan and Li Sitian believe that flow unit is the building blocks divided by hydrodynamic conditions within
deposition system [7,8], which shares similar concepts with structural unit (structural elements); Qiu Yinan
considered that flow unit is the fluid flow channel formed naturally and featuring certain degree of oil displacing
created through injection water passing geological structure due to a variety of heterogeneity in reservoir,
barriers and bypass channeling conditions [9]; Mu Longxin argues that flow unit is, when an oil sand and its
inner part are limited by boundary, the reservoir units with similar permeability and water flooding
characteristics formed under the influences of discontinuous thin barrier layer, various deposition micro
interfaces, minor faults and permeability differences and other factors [3].
It is not difficult to find out from the above definition that flow unit mainly emphasis on reservoir unit,
being further subdivision of the reservoir layer. In this reservoir unit, the petrophysical properties effecting fluid
flow are the same, or similar percolation characteristics are possessed. Therefore, flow unit can be defined as
reservoir unit having parallel flow characteristics.
The definition of flow unit reflects not only the basic features of internal fluid flow of reservoir, but
also the changes of petrophysical properties in reservoir. In general, similar percolation characteristics indicate
the petrophysical properties effecting fluid flow are the same. Different flow unit reflects different physical
properties of rock.
2.2 The basic characteristics of flow unit
Development characteristics and spatial distribution of flow cell are mainly controlled and influenced
by the original sedimentary, tectonism and diagenesis or even by various measures taken during oilfield
development (for example after water-flooding, physical properties of reservoir will change, etc.) Thus, flow
unit is a comprehensive reflection of physical properties of reservoir rock. A reservoir can be divided into a
number of flow unit blocks owing different petrophysical properties. Within the same flow cell, the geological
factors effecting fluid flow are same with identical hydrodynamic characteristics and percolation characteristics.
For water-flooding development oilfield, the same flow unit should have the same flooding characteristics and
residual oil distribution regularity; difference flow units exhibit different petrophysical properties featuring
3. Study on Flow Unit Division Approaches of Continental Reservoir
International organization of Scientific Research 28 | P a g e
various hydrodynamic characteristics and percolation characteristics as well as diverse flooding situation. Some
may be residual oil and some have been washed by water while some are still movable oil.
Flow unit is objectively existed in reservoir. In space, many different characteristics’ flow units inset
and fold to form a complete reservoir. Boundaries of various flow units should correspond with the location,
lithology and petrographic zone of each fault and the type distribution of diagenesis cements. A single sand body
can be composed of a flow unit or a couple of flow units.
Due to the heterogeneity of reservoir is graded with different scales [10], flow unit is just the same.
However due to the restrictions of exploration and development stage as well as the reasons such as the
complexity of research object, the mastery of information and research means, people have limited knowledge
about flow unit. At various stages of oilfield exploration and development period or under different research
purposes, flow unit can be understood differently. If a study area has less complex geological conditions, under
dense well pattern, both static and dynamic data are extremely rich then the awareness level to flow unit is
higher. With the increased awareness of reservoir heterogeneity, the understanding of flow unit increases. In this
sense, flow unit is a relative concept. For various exploration and development stages, different research
purposes or different causative flow cell, the range and research methods of flow unit’s definition vary. The
division of flow unit is concerned with the current technical level and geological problems need to be solved.
III. DIVISION OF FLOW UNIT IN STUDY AREA
3.1 Flow unit division approaches of continental reservoir
The division of flow units in continental reservoir should be based on the differences of geological
characteristics and percolation characteristics in continental reservoir. The difference of percolation
characteristics are not only reflected in vertical profile, but also in plane. So that the division of flow unit needs
to consider the differences both in vertical and plane percolation characteristics, so as to determine the spatial
distribution of flow unit.
The differences in vertical percolation characteristics should be based on faults, fractures,
compartment, mezzanine, the rhythm of permeability, bedding structure and the distribution features of pore
structure to further subdivide the reservoir. The subdivision level should consider the purpose and need of the
research. As for high water-cut stage fine geologic research, it should be divided further for currently divided
sublayer in accordance with the distribution features of mezzanine and other signs reflected by well log such as
rhythm nature, lithological association and contact relations. If possible, it should conduct further division in
accordance with bedding structure and pore structure and the reservoir units after dividing is the division of flow
unit in vertical profile.
Differences in plane percolation characteristics should be in line with the closure of faults and the
geologic features such as the distribution of sand body and the spread of sedimentary microfacies, based on
analysis of reservoir percolation characteristics and flow unit representations, to determine the boundaries of
flow unit.
3.2 The division of flow units in study area
The study area is the well patterns test area.In the East of the Second Region in the North of Daqing
Saertu Oil Field, located in the north of Daqing Changyuan Saertu structure in Songliao Basin, which is the pilot
test area designed for further developing the three encryptions in Daqing Oil Field. With an area of about
0.835km2
, this test area has 89 oil wells after the three encryptions and also a sealed coring wells, and its density
of well patterns has reached 90.4 / km2
. The static and dynamic data is abundant in study area, which lays a solid
foundation for the carrying-out of elaborate geological research and the division of flow units.
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The division of vertical flow units
Due to the relativity and hierarchy of flow units, a oil layer group, a sandstone group or a small layer
can be seen as the flow units of different levels. Since the dense well pattern test area in the East of the Second
Region in the North of Daqing Saertu Oil Field has large-density well patterns and abundant data and the
purpose of study is to investigate the distribution characteristics of remaining oil in high water-cut period, as for
the division of flow units in study area, the current small layers should be further divided into smaller segments.
Owing to the faults in study area, the extremely rudimentary fractures and shortage of coring wells’ data, the
division of vertical flow units in study area is based on the analysis of coring wells. According to the distribution
characteristics of faults and interlayer, relying on the logging curve to reflect the sedimentary sequence, rhythm
nature, lithological association, contact relationships and other signs, we divide the flow units in vertical. The
flow unit that has been divided is the independent smallest sand body unit that can be divided and compared,
which reflects the continuously changing process of the hydrodynamic conditions in the deposition course.
According to the division methods of flow units, in the SⅡoil layer groups, we divide from the current
9 small layers to 18 flow units (Table 1), and in the PⅠoil layer groups, we divide from the current 6 small
layers to 10 flow units (Table 2). Each flow unit is the final unit after the subdivision of small layers, and it can
be compared within the whole region.
The division of plane flow units in study area
Since the faults in study area do not develop very well, the division of plane flow units in study area
should be based on the distribution of sand body and the characteristics of sedimentary microfacies, and in
accordance with the stored coefficients and formation coefficients, the flow units can be further divided into Ⅰ
type, Ⅱtype , Ⅲand Ⅳtype (Fig 1), among which the flow unit ofⅠtype is best at the seepage capacity and
storage capacity, while the flow unit of Ⅳtype is worst at the seepage capacity and storage capacity. According
to the data analysis of water flooded layer, the flow units of Ⅲtype and Ⅳtype are the major enrichment part of
the remaining oil-rich and are the main target of the encryption and potential tapping. Although the flow units
ofⅠtype and Ⅱtype have been washed, thickness of the water flooded layer is awaiting to be further expanded,
so there is still a certain potential to tap.
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Fig. 1: Classifications distribution of the flow unit in SⅡ2
IV. CONCLUSIONS AND RECOMMENDATIONS
The correct knowledge and the reasonable division of reservoir flow units play an important role in
correctly understanding the reservoir’s heterogeneity and finding out the distribution characteristics of
remaining oil. The division of flow units should consider not only the differences of the vertical flow’s
characteristics, but also the differences of the plane flow’s characteristics, so as to determine the spatial
distribution of flow units. The flow units reflect the basic characteristics of fluid flows within the reservoir, so
carrying out the in-depth research on flow units and improving its theoretical system and research methods have
a very important theoretical and practical production significance.
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