The methodology applied in this work is directed at mapping potential targets for Au mineralization using compositional kriging of ratios of Au pathfinder metals
Mapping Hydrothermal Mineral Deposits Using PCA and BR Methods in Baft 1:1000...INFOGAIN PUBLICATION
Evaluating the conventional methods for mapping hydrothermal altered deposits by using landsat-8 OLI images in the Baft one to one hundred thousand geological Sheet is the prime target of our study. We used the color composite, band ratio, principal component analysis. The color composite and band ratio methods showed very clearly the hydrothermal altered deposits of clay minerals, iron oxides and ferric oxides around the fumaroles. The principal component analysis also enabled us to represent undoubtedly the altered hydroxyl and iron oxide mineral deposits of this region concentrating around the fumaroles. Finally, the target detection method for reference spectral analysis by using EnvI 4.8 detected the representative hydrothermal altered minerals around study area. Therefore, all the methods showed high efficiency for mapping hydrothermal altered mineral deposits.
Geoarchaeology Developing a Method for Provenancing of Hong Kong Pre-historic...chius
Abstract
Applying geological techniques to archaeological problems such that physical and cultural landscapes of the past can be reconstructed.
Develop a framework for the geological investigation of archaeological ceramic materials
Petrography and Geochemistry: (1) Compilation of a Preliminary Dataset; (2) Results show a correlation of typology to composition, but artefact assemblages across Hong Kong do not reflect source area
Conclusion: This approach is useful to provenance studies, although conclusive results require further work.
This document summarizes a sequence stratigraphic interpretation and play fairway analysis project conducted by TGS in the Labrador Sea utilizing seismic and well data. The project aims to provide a geologic model of basin deposition over time, delineate reservoir and seal distributions related to tectonic activity, and identify prospective hydrocarbon leads. TGS integrated well log and seismic data to define a sequence stratigraphy framework and map 14 depositional sequences. Interpreted data is delivered in various formats along with maps, horizons, faults, and a report summarizing the project, basin modeling, and fluid modeling. Benefits include a foundational exploration tool, shortened exploration timelines, insights into regional deposition, reduced risk through source-reservoir
Delineation of Hydrocarbon Bearing Reservoirs from Surface Seismic and Well L...IOSR Journals
Hydrocarbon reservoir has been delineated and their boundaries mapped using direct indicators from 3-D seismic and well log data from an oil field in Nembe creek, Niger Delta region. Well log signatures were employed to identify hydrocarbon bearing sands. Well to seismic correlation revealed that these reservoirs tied with direct hydrocarbon indicators on the seismic section. The results of the interpreted well logs revealed that the hydrocarbon interval in the area occurs between 6450ft to 6533ft for well A, 6449ft to 6537ft for well B and 6629ft to 6704ft for well C; which were delineated using the resistivity, water saturation and gamma ray logs. Cross plot analysis was carried out to validate the sensitivity of the rock attributes to reservoir saturation condition. Analysis of the extracted seismic attribute slices revealed HD5000 as hydrocarbon bearing reservoir.
Item 18. Endorsement of the units of measure to use in GLOSOLAN SOPsSoils FAO-GSP
The 4th meeting of the Global Soil Laboratory Network (GLOSOLAN) discussed endorsement of units of measure to use in standard operating procedures. It was agreed that SI units or SI-compatible units should be used, with conversions between unit types provided. Guidelines for common soil analysis methods and properties were given, specifying recommended units for measurements such as pH, organic carbon, nitrogen, extractable phosphorus, and bulk density. The meeting also discussed conventions for number of significant figures and formats for reporting units.
The document discusses using 3D modeling to visualize existing geodata for exploration target generation. It describes digitizing old mine maps and geological data, including drill holes and assays, and georeferencing them in modeling software. This allows visualizing potential targets at depth or overlooked areas and identifying spatial relationships to guide new exploration. Digitizing requires a consistent approach and planning the project setup in advance.
Mapping Hydrothermal Mineral Deposits Using PCA and BR Methods in Baft 1:1000...INFOGAIN PUBLICATION
Evaluating the conventional methods for mapping hydrothermal altered deposits by using landsat-8 OLI images in the Baft one to one hundred thousand geological Sheet is the prime target of our study. We used the color composite, band ratio, principal component analysis. The color composite and band ratio methods showed very clearly the hydrothermal altered deposits of clay minerals, iron oxides and ferric oxides around the fumaroles. The principal component analysis also enabled us to represent undoubtedly the altered hydroxyl and iron oxide mineral deposits of this region concentrating around the fumaroles. Finally, the target detection method for reference spectral analysis by using EnvI 4.8 detected the representative hydrothermal altered minerals around study area. Therefore, all the methods showed high efficiency for mapping hydrothermal altered mineral deposits.
Geoarchaeology Developing a Method for Provenancing of Hong Kong Pre-historic...chius
Abstract
Applying geological techniques to archaeological problems such that physical and cultural landscapes of the past can be reconstructed.
Develop a framework for the geological investigation of archaeological ceramic materials
Petrography and Geochemistry: (1) Compilation of a Preliminary Dataset; (2) Results show a correlation of typology to composition, but artefact assemblages across Hong Kong do not reflect source area
Conclusion: This approach is useful to provenance studies, although conclusive results require further work.
This document summarizes a sequence stratigraphic interpretation and play fairway analysis project conducted by TGS in the Labrador Sea utilizing seismic and well data. The project aims to provide a geologic model of basin deposition over time, delineate reservoir and seal distributions related to tectonic activity, and identify prospective hydrocarbon leads. TGS integrated well log and seismic data to define a sequence stratigraphy framework and map 14 depositional sequences. Interpreted data is delivered in various formats along with maps, horizons, faults, and a report summarizing the project, basin modeling, and fluid modeling. Benefits include a foundational exploration tool, shortened exploration timelines, insights into regional deposition, reduced risk through source-reservoir
Delineation of Hydrocarbon Bearing Reservoirs from Surface Seismic and Well L...IOSR Journals
Hydrocarbon reservoir has been delineated and their boundaries mapped using direct indicators from 3-D seismic and well log data from an oil field in Nembe creek, Niger Delta region. Well log signatures were employed to identify hydrocarbon bearing sands. Well to seismic correlation revealed that these reservoirs tied with direct hydrocarbon indicators on the seismic section. The results of the interpreted well logs revealed that the hydrocarbon interval in the area occurs between 6450ft to 6533ft for well A, 6449ft to 6537ft for well B and 6629ft to 6704ft for well C; which were delineated using the resistivity, water saturation and gamma ray logs. Cross plot analysis was carried out to validate the sensitivity of the rock attributes to reservoir saturation condition. Analysis of the extracted seismic attribute slices revealed HD5000 as hydrocarbon bearing reservoir.
Item 18. Endorsement of the units of measure to use in GLOSOLAN SOPsSoils FAO-GSP
The 4th meeting of the Global Soil Laboratory Network (GLOSOLAN) discussed endorsement of units of measure to use in standard operating procedures. It was agreed that SI units or SI-compatible units should be used, with conversions between unit types provided. Guidelines for common soil analysis methods and properties were given, specifying recommended units for measurements such as pH, organic carbon, nitrogen, extractable phosphorus, and bulk density. The meeting also discussed conventions for number of significant figures and formats for reporting units.
The document discusses using 3D modeling to visualize existing geodata for exploration target generation. It describes digitizing old mine maps and geological data, including drill holes and assays, and georeferencing them in modeling software. This allows visualizing potential targets at depth or overlooked areas and identifying spatial relationships to guide new exploration. Digitizing requires a consistent approach and planning the project setup in advance.
GSA 2015 - Computer Based Facies Simulations in Orebodies: Benefits, Drawback...Mike Bingle-Davis
Many computer program packages are available to utilize in geostatistical interpretation. These include VULCAN, PETRA, GEOGRAPHIX, and in the case of this example I will be using SGEMS - a freeware program. Kriging : Derives the best linear estimate of the variable over a given surface. Smoothing properties of interpolation algorithms replace local detail and replace with a good average. Geologists and reservoir engineers / mining conditions require finer scaled details of reservoir heterogeneity – Kriging is the average of numerous realizations, we may want to see these iterations to determine best fit scenarios
A Fresh Look at Marine Magnetic Anomalies, One of the Key Datasets in the Dev...The Rothwell Group, L.P.
A Fresh Look at Marine Magnetic Anomalies, One of the Key Datasets in the Development of Plate Tectonics by Ian Norton - 2014 PaleoGIS & PaleoClimate Users Conference
12 reedlunn reinvestigation into closure predictions sand2016 8559leann_mays
Room D was an underground experiment at Waste Isolation Pilot Plant between 1984-1991 that measured rock salt creep around an excavated room. Early simulations underpredicted vertical closure of the room by 4.5x, requiring adjustments to model parameters. Recent interest in Room D has led to updating simulations using today's standards and recalibrating the constitutive model against new salt creep laboratory experiments. The updated model still underpredicts vertical closure, but by a reduced amount of 3.1x. Potential improvements to the model are discussed.
A Weight Coefficients Method for Geostatistical Three-Dimensional Modeling - ...CrimsonPublishersRDMS
A Weight Coefficients Method for Geostatistical Three-Dimensional Modeling by Zhang Jinliang* in Crimson Publishers: Peer Reviewed Material Science Journals
This letter summarizes projects performed by Apex Spectral Technology using 2D and 3D seismic data offshore Guyana. Apex's ADF dispersion imaging process correctly imaged the Liza discovery well and predicted the Turbot discovery well would be successful, while indicating the Skipjack well would be dry. ADF processing of the entire Canje Block 3D seismic data reveals potential hydrocarbon anomalies in the Maastrichtian interval and deeper targets that have not yet been drilled, but indicate many new large discoveries. Having a tool that has successfully predicted previous wells increases the value of JHI's asset in the Canje Block.
1. The document discusses a bilateral meeting between Ireland and the UK on modeling and mapping critical loads for acidity and nutrient nitrogen.
2. It provides background on Ireland's previous work mapping critical loads between 1996-1999 and a 2009 update. It aims to initiate discussion on methodologies and compare national critical load databases.
3. The outcomes would involve comparing differences between the Irish and UK critical load databases and determining what a comparison would involve and associated timelines.
Structure-metric method FOR PREDICTIVE ESTIMATION of NATURAL RESOURCESKaterinaKaritskaya
Research Company offers performing forecast and estimation of presence of hydrocarbon fields by structurometric method. Structurometric method requires no field trips and provides significant time saving. Forecasts developed by structurometric method, in comparison with conventional exploration activities 3 times are more exact, by 1-2 orders more efficient, environment remains undisturbed.
Root-mean-square errors of definition of deposit depths and thickness of oil and gas formation according to numerous test wells do not exceed 4-5 % (at depths up to 4000 m.). There can be discovered productive formations at depths of 7 km and more, and also on a shelf at sea depth up to 450 m.
This method can be used rather productively by investors with the purpose of predictive estimations of resources of licensed sites and areas offered for right of land tenure.
This study estimates river discharge using MODIS satellite images. Due to the coarse spatial resolution of MODIS, reflectance values are extracted from a pixel near the river mouth rather than directly over the measurement point. Regression analysis is performed between reflectance and in situ discharge measurements taken on the same days from the Naka and Monobe Rivers in Japan in 2004. Results show the method can effectively estimate discharge in narrow rivers from MODIS data, with root mean square errors of 213 and 199 m3/s for the two rivers. Monthly and annual averages are also estimated with reasonable accuracy.
Diffuse reflectance spectroscopy to estimate soil attributes of Brazilian wet...Agriculture Journal IJOEAR
Abstract— The study of soils and characterization of its attributes are continually evolving, however, for the condition of wetlands, such information is still scarce and poorly distributed. Thus, the objective of this work was to characterize spectrally the soils of a wetland area. On the study area were collected georeferenced soil samples and sent for chemical and physical analysis routine and then subjected to spectral evaluation. Were identified seven soil classes with hydromorphic characteristics in their spectral curves? The information contained in these curves then led the development of equations for soil attributes. Sand was the physical attribute of a better correlation with laboratory data and Cationic Exchange Capacity (CEC), the chemical attributes that showed better results.
2014 ALA Annual Presentation FINAL- CARTOGRAPHIC RESOURCES AND RDA 6-25-2014Paige Andrew
RDA introduces several changes for cataloging cartographic resources from AACR2 rules and practices. Key changes include using plain language over abbreviations, recording specific content, media, and carrier types in new 33X fields, and representing scale and other data elements as supplied rather than transcribed information. Relationship designators are now used to clarify roles like cartographer. The core elements remain similar with a focus on title, statement of responsibility, scale, publication information, and extent.
This document summarizes a methodology for reservoir characterization that involves determining the reservoir's architecture, fluid flow trends, and growth potential. It also describes two approaches for hydraulic flow unit determination and its application for predicting petrophysical properties. The approaches involve clustering analysis, relative quality indices, and normalized porosity to predict hydraulic flow units and construct capillary pressure curves for property estimation. Accurate reservoir characterization is important to reduce drilling costs and increase oil recovery.
1) Quadrants 34, 35, and 36 in the Northern North Sea contain a large gas province with good exploitation potential based on analysis of existing well and seismic data from the area.
2) Seismic inversion and calibration against key wells revealed multiple large potential gas traps in both the Lower Cretaceous and Upper Jurassic formations defined by gas-bearing and water-bearing sand intervals.
3) Acoustic impedance data identified two potential high-porosity sand channels trending NW-SE that could contain several trillion cubic feet of gas, demonstrating the hydrocarbon potential remaining to be fully unlocked in the area through reexamination of the extensive existing dataset.
Petroleum geology is the study of the origin, occurrence, movement, accumulation, and exploration of hydrocarbon fuels such as oil. It involves analyzing sedimentary basins to understand the source rocks, reservoirs, seals, traps, timing, maturation and migration of hydrocarbons. The major subdisciplines include source rock analysis, basin analysis, exploration, appraisal, production, and reservoir analysis. During exploration, seismic studies and mapping of oil seeps are used to find potential hydrocarbon occurrences, while the appraisal stage delineates the extent of any discoveries.
GSOC17 Introduction, Product specifications, Existing SOC maps and methodologiesFAO
The document provides information on developing national soil organic carbon (SOC) maps according to Global Soil Partnership specifications. It outlines the methodological considerations for a country-driven approach, including compiling national SOC measurements, developing SOC soil grids using digital soil mapping, and delivering 1km version 0 SOC maps. Detailed specifications are provided for sharing national SOC data and auxiliary information. The document also discusses capacity planning and sharing examples from other national SOC inventories to support the creation of a cookbook for developing SOC maps.
This document discusses methods for estimating hydrocarbon volumes in oil and gas accumulations, including deterministic and probabilistic volumetric estimation methods. Deterministic methods average reservoir property data from wells, cores, and seismic to estimate field-wide properties, while probabilistic methods use statistics and analog data to predict trends away from sample points. Accurate reserve estimates are important for evaluating an oil and gas company's value and longer-term prospects. The document provides terminology and formulas for calculating metrics like STOIIP and GIIP using data on reservoir area, thickness, porosity, water saturation, and gas formation volume factor.
Arc Surveying & Mapping was contracted to survey the Cypress Creek Drainage Basin in Memphis, Tennessee as part of a project to map drainage basins and create a GIS database. The project involved surveying over 4,500 acres that contained over 2,000 drainage structures and 4 miles of canals. Arc Surveying & Mapping used robotic total stations and RTK GPS to locate and measure over 2,000 structures and perform cross sections every 500 feet along canals and ditches. They also surveyed bridges and worked on the project for over 4 months collecting data to contribute to the drainage basin mapping.
This presentation was presented during the Workshop on Soil Cabon Mapping of the Global Soil Partnership (GSP) that took place at FAO headquarters 23 November 2016. The presentation was made by Neil McKenzie from the Commonwealth Scientific and Industrial Research Organisation, Australia
Basin modeling of the Permian Basin in West Texas provides insight into undiscovered hydrocarbon resources through integration of subsurface data. High resolution 3D modeling of local geology yields improved regional understanding of fluid migration pathways. Integrating legacy well data and published structure maps digitally into basin models aids in characterization of tight reservoir systems and identification of previously unseen hydrocarbon traps.
Michael Frankovitch has over 30 years of experience as a geologist, working on projects in South Africa, Canada, Libya, and other countries. He is currently a Principal Geologist at PetroSA in Cape Town, where he manages projects, updates geological models, and assesses new prospects. Previously he held senior geology roles with several oil and gas companies, gaining experience in reservoir characterization, drilling programs, production growth, and business development. He has strong technical skills in mapping, seismic interpretation, reservoir modeling, and risk assessment.
Hydrocarbon potential of the Borno Basin through Electrofacies and depositional environment analysis was carried out from well log and seismic reflection data to reassess the potential of the Basin thereby justifying the huge financial commitment of the Government. The reflection configuration pattern from the seismic reflection lines is characterized by variation from parallel, continuous and strong amplitude to sub parallel, chaotic discontinuous and low amplitude which indicate a variation from a low energy basinal setting of uniform rate of continental deposition to high energy environment of monolithologic deposits. Furthermore, the derivable log signatures shows a variation from serrated mud/sand to serrated blocky to serrated funnel and bell shapes with depth. This imply a stable massive mud/sand rich basinwide environment to an upward regressive sequence of bar deposit followed by a deltaic estuarine clastic sediment to gradual upward transgressive decrease in grain size to a fluvial point bar deposit. These environments identified from the research are known to be hydrocarbon province.
This document discusses using geochemical data to generate exploration targets on a low budget. It provides average costs for different types of geochemical surveys and regulatory minimum expenditures. It also describes how statistical analysis of geochemical data can be used to reduce noise, identify element associations and contamination factors, extract regional geology factors, and vector towards mineralization, outlined with two case studies analyzing lake sediment and moss data.
GSA 2015 - Computer Based Facies Simulations in Orebodies: Benefits, Drawback...Mike Bingle-Davis
Many computer program packages are available to utilize in geostatistical interpretation. These include VULCAN, PETRA, GEOGRAPHIX, and in the case of this example I will be using SGEMS - a freeware program. Kriging : Derives the best linear estimate of the variable over a given surface. Smoothing properties of interpolation algorithms replace local detail and replace with a good average. Geologists and reservoir engineers / mining conditions require finer scaled details of reservoir heterogeneity – Kriging is the average of numerous realizations, we may want to see these iterations to determine best fit scenarios
A Fresh Look at Marine Magnetic Anomalies, One of the Key Datasets in the Dev...The Rothwell Group, L.P.
A Fresh Look at Marine Magnetic Anomalies, One of the Key Datasets in the Development of Plate Tectonics by Ian Norton - 2014 PaleoGIS & PaleoClimate Users Conference
12 reedlunn reinvestigation into closure predictions sand2016 8559leann_mays
Room D was an underground experiment at Waste Isolation Pilot Plant between 1984-1991 that measured rock salt creep around an excavated room. Early simulations underpredicted vertical closure of the room by 4.5x, requiring adjustments to model parameters. Recent interest in Room D has led to updating simulations using today's standards and recalibrating the constitutive model against new salt creep laboratory experiments. The updated model still underpredicts vertical closure, but by a reduced amount of 3.1x. Potential improvements to the model are discussed.
A Weight Coefficients Method for Geostatistical Three-Dimensional Modeling - ...CrimsonPublishersRDMS
A Weight Coefficients Method for Geostatistical Three-Dimensional Modeling by Zhang Jinliang* in Crimson Publishers: Peer Reviewed Material Science Journals
This letter summarizes projects performed by Apex Spectral Technology using 2D and 3D seismic data offshore Guyana. Apex's ADF dispersion imaging process correctly imaged the Liza discovery well and predicted the Turbot discovery well would be successful, while indicating the Skipjack well would be dry. ADF processing of the entire Canje Block 3D seismic data reveals potential hydrocarbon anomalies in the Maastrichtian interval and deeper targets that have not yet been drilled, but indicate many new large discoveries. Having a tool that has successfully predicted previous wells increases the value of JHI's asset in the Canje Block.
1. The document discusses a bilateral meeting between Ireland and the UK on modeling and mapping critical loads for acidity and nutrient nitrogen.
2. It provides background on Ireland's previous work mapping critical loads between 1996-1999 and a 2009 update. It aims to initiate discussion on methodologies and compare national critical load databases.
3. The outcomes would involve comparing differences between the Irish and UK critical load databases and determining what a comparison would involve and associated timelines.
Structure-metric method FOR PREDICTIVE ESTIMATION of NATURAL RESOURCESKaterinaKaritskaya
Research Company offers performing forecast and estimation of presence of hydrocarbon fields by structurometric method. Structurometric method requires no field trips and provides significant time saving. Forecasts developed by structurometric method, in comparison with conventional exploration activities 3 times are more exact, by 1-2 orders more efficient, environment remains undisturbed.
Root-mean-square errors of definition of deposit depths and thickness of oil and gas formation according to numerous test wells do not exceed 4-5 % (at depths up to 4000 m.). There can be discovered productive formations at depths of 7 km and more, and also on a shelf at sea depth up to 450 m.
This method can be used rather productively by investors with the purpose of predictive estimations of resources of licensed sites and areas offered for right of land tenure.
This study estimates river discharge using MODIS satellite images. Due to the coarse spatial resolution of MODIS, reflectance values are extracted from a pixel near the river mouth rather than directly over the measurement point. Regression analysis is performed between reflectance and in situ discharge measurements taken on the same days from the Naka and Monobe Rivers in Japan in 2004. Results show the method can effectively estimate discharge in narrow rivers from MODIS data, with root mean square errors of 213 and 199 m3/s for the two rivers. Monthly and annual averages are also estimated with reasonable accuracy.
Diffuse reflectance spectroscopy to estimate soil attributes of Brazilian wet...Agriculture Journal IJOEAR
Abstract— The study of soils and characterization of its attributes are continually evolving, however, for the condition of wetlands, such information is still scarce and poorly distributed. Thus, the objective of this work was to characterize spectrally the soils of a wetland area. On the study area were collected georeferenced soil samples and sent for chemical and physical analysis routine and then subjected to spectral evaluation. Were identified seven soil classes with hydromorphic characteristics in their spectral curves? The information contained in these curves then led the development of equations for soil attributes. Sand was the physical attribute of a better correlation with laboratory data and Cationic Exchange Capacity (CEC), the chemical attributes that showed better results.
2014 ALA Annual Presentation FINAL- CARTOGRAPHIC RESOURCES AND RDA 6-25-2014Paige Andrew
RDA introduces several changes for cataloging cartographic resources from AACR2 rules and practices. Key changes include using plain language over abbreviations, recording specific content, media, and carrier types in new 33X fields, and representing scale and other data elements as supplied rather than transcribed information. Relationship designators are now used to clarify roles like cartographer. The core elements remain similar with a focus on title, statement of responsibility, scale, publication information, and extent.
This document summarizes a methodology for reservoir characterization that involves determining the reservoir's architecture, fluid flow trends, and growth potential. It also describes two approaches for hydraulic flow unit determination and its application for predicting petrophysical properties. The approaches involve clustering analysis, relative quality indices, and normalized porosity to predict hydraulic flow units and construct capillary pressure curves for property estimation. Accurate reservoir characterization is important to reduce drilling costs and increase oil recovery.
1) Quadrants 34, 35, and 36 in the Northern North Sea contain a large gas province with good exploitation potential based on analysis of existing well and seismic data from the area.
2) Seismic inversion and calibration against key wells revealed multiple large potential gas traps in both the Lower Cretaceous and Upper Jurassic formations defined by gas-bearing and water-bearing sand intervals.
3) Acoustic impedance data identified two potential high-porosity sand channels trending NW-SE that could contain several trillion cubic feet of gas, demonstrating the hydrocarbon potential remaining to be fully unlocked in the area through reexamination of the extensive existing dataset.
Petroleum geology is the study of the origin, occurrence, movement, accumulation, and exploration of hydrocarbon fuels such as oil. It involves analyzing sedimentary basins to understand the source rocks, reservoirs, seals, traps, timing, maturation and migration of hydrocarbons. The major subdisciplines include source rock analysis, basin analysis, exploration, appraisal, production, and reservoir analysis. During exploration, seismic studies and mapping of oil seeps are used to find potential hydrocarbon occurrences, while the appraisal stage delineates the extent of any discoveries.
GSOC17 Introduction, Product specifications, Existing SOC maps and methodologiesFAO
The document provides information on developing national soil organic carbon (SOC) maps according to Global Soil Partnership specifications. It outlines the methodological considerations for a country-driven approach, including compiling national SOC measurements, developing SOC soil grids using digital soil mapping, and delivering 1km version 0 SOC maps. Detailed specifications are provided for sharing national SOC data and auxiliary information. The document also discusses capacity planning and sharing examples from other national SOC inventories to support the creation of a cookbook for developing SOC maps.
This document discusses methods for estimating hydrocarbon volumes in oil and gas accumulations, including deterministic and probabilistic volumetric estimation methods. Deterministic methods average reservoir property data from wells, cores, and seismic to estimate field-wide properties, while probabilistic methods use statistics and analog data to predict trends away from sample points. Accurate reserve estimates are important for evaluating an oil and gas company's value and longer-term prospects. The document provides terminology and formulas for calculating metrics like STOIIP and GIIP using data on reservoir area, thickness, porosity, water saturation, and gas formation volume factor.
Arc Surveying & Mapping was contracted to survey the Cypress Creek Drainage Basin in Memphis, Tennessee as part of a project to map drainage basins and create a GIS database. The project involved surveying over 4,500 acres that contained over 2,000 drainage structures and 4 miles of canals. Arc Surveying & Mapping used robotic total stations and RTK GPS to locate and measure over 2,000 structures and perform cross sections every 500 feet along canals and ditches. They also surveyed bridges and worked on the project for over 4 months collecting data to contribute to the drainage basin mapping.
This presentation was presented during the Workshop on Soil Cabon Mapping of the Global Soil Partnership (GSP) that took place at FAO headquarters 23 November 2016. The presentation was made by Neil McKenzie from the Commonwealth Scientific and Industrial Research Organisation, Australia
Basin modeling of the Permian Basin in West Texas provides insight into undiscovered hydrocarbon resources through integration of subsurface data. High resolution 3D modeling of local geology yields improved regional understanding of fluid migration pathways. Integrating legacy well data and published structure maps digitally into basin models aids in characterization of tight reservoir systems and identification of previously unseen hydrocarbon traps.
Michael Frankovitch has over 30 years of experience as a geologist, working on projects in South Africa, Canada, Libya, and other countries. He is currently a Principal Geologist at PetroSA in Cape Town, where he manages projects, updates geological models, and assesses new prospects. Previously he held senior geology roles with several oil and gas companies, gaining experience in reservoir characterization, drilling programs, production growth, and business development. He has strong technical skills in mapping, seismic interpretation, reservoir modeling, and risk assessment.
Hydrocarbon potential of the Borno Basin through Electrofacies and depositional environment analysis was carried out from well log and seismic reflection data to reassess the potential of the Basin thereby justifying the huge financial commitment of the Government. The reflection configuration pattern from the seismic reflection lines is characterized by variation from parallel, continuous and strong amplitude to sub parallel, chaotic discontinuous and low amplitude which indicate a variation from a low energy basinal setting of uniform rate of continental deposition to high energy environment of monolithologic deposits. Furthermore, the derivable log signatures shows a variation from serrated mud/sand to serrated blocky to serrated funnel and bell shapes with depth. This imply a stable massive mud/sand rich basinwide environment to an upward regressive sequence of bar deposit followed by a deltaic estuarine clastic sediment to gradual upward transgressive decrease in grain size to a fluvial point bar deposit. These environments identified from the research are known to be hydrocarbon province.
This document discusses using geochemical data to generate exploration targets on a low budget. It provides average costs for different types of geochemical surveys and regulatory minimum expenditures. It also describes how statistical analysis of geochemical data can be used to reduce noise, identify element associations and contamination factors, extract regional geology factors, and vector towards mineralization, outlined with two case studies analyzing lake sediment and moss data.
Mobile Metal Ion (MMI) soil geochemistry surveys have been conducted over a large magnetic anomaly in the Ramot Menashe area, known as the Galed Anomaly. Analysis of soil samples from four MMI surveys found anomalous concentrations of metals that are indicators of mafic and ultramafic rocks. Kimberlite indicator minerals have also been found in the area, including garnet compositions that provide evidence of possible kimberlites. Together, the geophysical data, geochemistry, and indicator mineral evidence suggest the presence of kimberlitic or mafic rocks at depth, making the Galed Anomaly a priority target for diamond exploration.
Quantitative lithology an application for open and cased hamrhaggag
1) The document presents a new quantitative lithology interpretation method based on elemental concentrations from gamma ray spectroscopy logs.
2) It finds strong linear relationships between total clay concentration and the elemental concentrations of aluminum, silicon, calcium, and iron in core samples.
3) The method uses concentrations of silicon, calcium and iron to estimate clay content as accurately as using aluminum concentration, which is difficult to measure via logging. Example clay estimates are provided and show good agreement with core data.
Os três “q´s” da formação universitária de jovens no Brasil: Para o quê? Quem...ufrj
Quem ensina, quem estuda, para o quê? Sem ter a clareza sobre essas três dimensões em um processo educativo corre-se o risco de não entender o que está ocorrendo com a formação universitária dos jovens no Brasil. Mais de vinte anos após a lei de diretrizes e bases do ensino superior (LDB) e dez anos do Programa de Reestruturação da Universidade (REUNI) já se pode ter uma ideia da trajetória da universidade brasileira. No caso esta análise vai se concentrar nas universidades públicas federais em face da dimensão e da diversidade de instituições de ensino superior (IES) no Brasil, mas a mesma abordagem pode ser utilizada para IES privadas e ou não universitárias. A análise parte do efeito da LDB sobre a organização do ensino superior e de sua potencialização pelo REUNI num processo que permanece até os dias atuais e se projeta para o futuro à margem da opinião e participação da sociedade real brasileira.
1) O artigo discute os três "Qs" da formação universitária no Brasil: para quê, quem ensina e quem estuda.
2) A Lei de Diretrizes e Bases estabeleceu muitas finalidades ambiciosas para as universidades, mas falhou em definir claramente o perfil das instituições. Isso levou a um excesso de atividades e objetivos nas universidades.
3) O corpo docente é formado principalmente por pesquisadores formados no Brasil, levando a uma ênfase excessiva na pesquisa em detrimento da aplic
Financiar periódicos abertos ou bases abertas de periódicosufrj
O documento discute a história e expansão dos periódicos científicos, desde sua publicação inicial por sociedades científicas até a tomada por editoras comerciais. Também aborda os impactos da revolução digital, incluindo a emergência de periódicos on-line abertos e fechados e bases de dados de periódicos. Por fim, destaca os desafios atuais de garantir a qualidade dos periódicos científicos.
O documento discute estudos de caso sobre dengue utilizando mineração de dados. A dengue é uma doença transmitida por mosquitos que afeta milhões no Brasil. Os estudos de caso descrevem modelos para classificar perfis de pacientes e prever o risco de infecção por dengue usando dados clínicos coletados. A mineração de dados pode otimizar as decisões de saúde pública ao identificar grupos de alto risco.
Este documento apresenta os conceitos de descoberta de conhecimento em bancos de dados e mineração de dados, incluindo as etapas do processo e várias técnicas comuns como classificação, regressão, árvores de decisão e redes neurais. Também discute tópicos como pré-processamento e validação de dados, bancos de dados para mineração e o uso de mineração para aplicações como marketing.
Maratona de negocios cp br7 apresentação do projeto obsuniufrj
O documento descreve um projeto para o Observatório da Universidade (OBSUNI) que tem como objetivo desenvolver conteúdo reflexivo sobre políticas de educação superior de forma colaborativa. O projeto pretende promover debates e divulgar notícias, textos e eventos sobre o ensino superior. Atualmente o projeto possui um blog, canal de vídeo e rádio na internet, mas visa expandir para uma plataforma integrada com maior alcance.
El documento presenta una introducción al tema de la minería de datos, incluyendo enlaces a un blog y libro sobre el tema, así como múltiples referencias a estudios de caso relacionados con la minería de datos.
Este documento presenta una introducción a la minería de datos. Explica métodos para modelado de datos como clasificación, regresión y agrupamiento, así como validación de modelos mediante métricas como la precisión de clasificación. El documento también incluye enlaces a recursos adicionales sobre minería de datos.
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1. Mapping gold pathfinder metal ratios –
A methodological approach based on
compositional analysis of spatially
distributed multivariate data
Braga,L.P.1, Porto,C.1, Silva,F.2 and Borba,R.1
1Federal University of Rio de Janeiro
2Federal Rural University of Rio de Janeiro
Rio de Janeiro, RJ, Brazil
2. Geochemical exploration in deeply weathered
terrains is often hampered by a strong
modification of primary geochemical signals at
surface, making it difficult to locate potential
targets using geochemical results of soil samples.
3. This problem is particularly relevant in the
Amapari region, Amapá state, Brazil, where
10,235 soil samples were collected in an
extensive grid covering ~ 500 km2, whose
samples were analysed by ICP-MS after an
Aqua Regia digest producing results for 51
elements.
4.
5.
6. The methodology applied in this work is
directed at mapping potential targets for Au
mineralization using compositional kriging of
ratios of Au pathfinder metals
7. The samples were classified according to distinct
groups: training, composed of mineralized
samples over a known deposit area (B) and non-
mineralized samples from a background area (A);
validation, composed of another set of
mineralized samples over the same known deposit
area (B) and non-mineralized samples from the
same background area (A)
8. Training will be used to generate a model and
Validation to evaluate its performance with
samples not used in the modelling steps. The
criteria to validate the model uses the area
location (A or B) where the sample falls and its
metal content
10. From the 51 initial elements, (Au) was eliminated and
19 others as well as like B, Ba, Ca,Cd, Ce, Co, Mg, Mn,
Na, P, Re, Sb, Se, Sn, Sr, Ta, Te, Y, Zn based on
exploratory analysis. For example, Boron (B) has
almost every sample below detection limit (bdl).
Another example is phosphorus (P) which was
excluded for showing similar behaviour in both areas
A and B.
11. In addition to pure statistical reasons, geological analysis
was taken into account, eliminating five more metals –
(Be, Cs, K, Li and Rb) because they were associated to
granitoids and not to gold.
Drainage
Bif= bandded iron formation
Gn= gneiss
Gr= grantie
Grdt= granodiorite
-----
UM= ultramafic rocks
VNO= Vila Nova metavolcanic sequence
12. The Compositional Analysis approach was
adopted due to the nature of the data. Data was
treated with "compositions", an R-package for the
analysis of compositional and positive data using
different approaches, written by K. Gerald Van den
Boogart, Raimon Tolosana-Delgado and Matevz
Bren (version 1.40-1).
13. In the training phase of the model metals
associated with the Au mineralization were
identified using Compositional Principal
Components.
14. Based on these plots a Compositional
Discriminant Function was developed to
identify the origin of each sample (A or B) for
the selected metals. .
15. The second set, validation, is composed of
mineralized samples over the same known deposit
area (B) and non-mineralized samples from the
same background area (A). A satisfactory test with
the same discriminant function obtained from the
training sample was performed.
16. The confusion matrix shown below contains
information about actual and predicted
classifications done by the Compositional
Discriminant Function. It allows it to evaluate the
accuracy of the classification done.
Actual
Predicted
False Negative
False Positive
17. The third set to be tested (C), prospection, is
composed of samples from the rest of the area
covered by the grid but where Au mineralization has
not been recognized. However, the results were not
meaningful and another approach was assumed.
C
18. A compositional kriging interpolation was used to
build a map with the prospection samples where
only geochemical results were available. The first
step was to obtain models of Compositional Crossed
Variogram with the metals selected in the previous
phase. Below the adjusted model for the As-Hf-Tl
subcomposition.
19. As compositional kriging cant be calculated directly on the
subcompostions, several ratios(balances) between metals
were tried before the balance Tl/Hf was chosen for the
trainning area (A+B). Certainly, the result is not categorically
represented as in the discriminant function approach. The
value is a signal that points to areas more or less mineralized
(green: poor mineralization up to white: high mineralization).
B
A
B
A
20. The adjusted variogram model (A+B) was then applied
to the kriging of the third sample (C). The balloons (left)
and the stars (right) point to effective minning activity.
21. This result is geologically and experimentally
coherent. First, the distributions of Hf and Tl in the
region show that area A has much more Hf than
area B and that Tl is present in area B but not in A.
This behaviour was observed after the present
balance kriging map was produced.
22. Second, a mining company has been working
in this area and is effectively mining gold in
the areas inside the signal map obtained from
the balance Tl/Hf.
Trainning A+B
Prospection C
(without A+B data)
23. Summing up
We propose a methodology for mapping gold
pathfinder metal ratios as a tool to reinforce
geochemical signals. The basic steps are:
1. Exploratory analysis of the data
2. Calculation of compositions
3. Principal Component Analysis
4. Selection of subcompositions
5. Modeling the logratio variogram(trainning)
6. Selection of Balances(trainning and validation)
7. Mapping the interpolation of composition
represented by a chosen balance(prospection)
24. References
Pawowlsky,-Glahn, V., Egozcue, J.J., Tolosana-
Delgado,R. (2015)Modelling and analysis of
compositional data: Wiley
Boogaart, K.G. Tolosana-Delgado, R. (2013) Analyzing
Compositional Data with R: Springer
Melo, L.V. de, Villas, R.N., Soares, J.S., Faraco, M.T.L.
(2003) Geological setting and mineralizing fluids of the
Amapari gold deposit, Amapá State, Brazil: BRGM-
France3.