The Numerical Offshore Tank - TPN was idealized to work through a cooperative approach. In its new infrastructure, TPN has a high performance cluster of 50 TeraFLOPS, which runs an integrated and multitask set of analytical models and numerical tools for a wide diversity of operational conditions of new offshore and naval architecture projects. In addition, TPN has an hydrodynamic basin, with active wave absorption, specifically dedicated to generate experimental results for comparison purpose and, in specific cases, for validation of design hypothesis and, eventually, new analytical models.
This document describes HarshLab, a unique offshore laboratory located off the coast of Spain for testing components in harsh offshore environments. A novel offshore laboratory was designed and constructed in two stages: HarshLab1.0, which was deployed in July 2018 to test components, and HarshLab2.0, an upgraded version planned for 2019 with fully functional equipment and modules. The laboratory offers testing of samples and components in atmospheric, splash, and immersion zones to evaluate performance in real offshore conditions over time.
2018 - CFD simulation of fluid dynamic and biokinetic processes within activa...WALEBUBLÉ
This document describes a CFD simulation of fluid dynamics and biokinetic processes within an activated sludge reactor (ASR) operating under intermittent aeration. The CFD model considers fluid dynamics, oxygen transfer, and biological processes described by Activated Sludge Model No. 1 (ASM1). The model is used to evaluate two different aeration system configurations for an ASR in terms of their ability to satisfy effluent requirements with minimum energy consumption. Results show that modifying the air diffuser layout can improve energy consumption by 2.8%, and reducing the air flow rate per diffuser improves energy consumption by 14.5%. The model provides insight into aeration inefficiencies within ASRs.
This document summarizes the Qatar Carbonates and Carbon Storage Research Centre (QCCSRC). The QCCSRC conducts multidisciplinary carbon storage research projects funded by industry through a $70 million, 10-year program involving over 70 researchers. The research includes reservoir condition experiments to study fluid-fluid and fluid-rock interactions. It also includes the first 3D micro CT images of residual supercritical CO2 in carbonate rock. The goal is to build predictive models for carbon sequestration through improved understanding of processes in carbonate reservoirs and seals.
POSEIDON is an innovative technology for reservoir management, surveillance, and locating remaining oil. It provides concise remaining oil maps within weeks without full reservoir simulation, enabling identification of opportunities like idle well reactivation. The approach uses a novel production inversion technique called ROCM to explicitly solve for saturation fields and match production data, being over 1000x faster than traditional simulation. It generates synthetic logs for producing and non-producing wells to accurately estimate fluid contacts.
The document discusses ADNOC's main challenges with current simulation modeling workflows. It identifies issues with static models including fluids modeling and water saturation modeling. It also notes problems with dynamic models like transition zones between history and prediction modes. The document proposes improvements to modeling water saturation using new pressure capillary curves that better match well logs and improve history matching. It shows an example where the new curves enhanced gas-oil ratio and water cut matches after only 2 weeks of implementation. The conclusions state that addressing technical challenges requires integrated workflows and more resolution in models to better capture reservoir behaviors.
This document discusses the use of LNAPL transmissivity (Tn) in remediation design, progress evaluation, and determining endpoints. Tn is presented as an improved metric for quantifying mobile LNAPL impacts that can be determined through various field methods and recovery data analysis. The document outlines how Tn can be applied within the TRRP-32 framework, including using Tn values to select remediation technologies, calibrate models, evaluate operational performance, and determine when technical impracticability of hydraulic recovery has been reached. Threshold values of 0.3-0.8 ft2/day for Tn are presented as potential decision points for changing remediation approaches.
This is the presentation held at the NUGENIA 2017 Forum on March 29th, 2017 in Amsterdam about the CORTEX project (CORe monitoring Techniques and EXperimental validation and demonstration)
This document discusses reservoir evaluation techniques. It begins by defining reservoir evaluation as utilizing geological, geophysical, and engineering methods to understand downhole formation properties for better decision making. Key goals are estimating hydrocarbon volumes, assessing recoverable reserves, and prioritizing development. Important parameters in formation evaluation are identified as fluid composition, water saturation, size, volume, permeability, and porosity. The document also outlines technical challenges, the role of wireline logs, and the importance of reservoir evaluation for productivity and economic impact.
This document describes HarshLab, a unique offshore laboratory located off the coast of Spain for testing components in harsh offshore environments. A novel offshore laboratory was designed and constructed in two stages: HarshLab1.0, which was deployed in July 2018 to test components, and HarshLab2.0, an upgraded version planned for 2019 with fully functional equipment and modules. The laboratory offers testing of samples and components in atmospheric, splash, and immersion zones to evaluate performance in real offshore conditions over time.
2018 - CFD simulation of fluid dynamic and biokinetic processes within activa...WALEBUBLÉ
This document describes a CFD simulation of fluid dynamics and biokinetic processes within an activated sludge reactor (ASR) operating under intermittent aeration. The CFD model considers fluid dynamics, oxygen transfer, and biological processes described by Activated Sludge Model No. 1 (ASM1). The model is used to evaluate two different aeration system configurations for an ASR in terms of their ability to satisfy effluent requirements with minimum energy consumption. Results show that modifying the air diffuser layout can improve energy consumption by 2.8%, and reducing the air flow rate per diffuser improves energy consumption by 14.5%. The model provides insight into aeration inefficiencies within ASRs.
This document summarizes the Qatar Carbonates and Carbon Storage Research Centre (QCCSRC). The QCCSRC conducts multidisciplinary carbon storage research projects funded by industry through a $70 million, 10-year program involving over 70 researchers. The research includes reservoir condition experiments to study fluid-fluid and fluid-rock interactions. It also includes the first 3D micro CT images of residual supercritical CO2 in carbonate rock. The goal is to build predictive models for carbon sequestration through improved understanding of processes in carbonate reservoirs and seals.
POSEIDON is an innovative technology for reservoir management, surveillance, and locating remaining oil. It provides concise remaining oil maps within weeks without full reservoir simulation, enabling identification of opportunities like idle well reactivation. The approach uses a novel production inversion technique called ROCM to explicitly solve for saturation fields and match production data, being over 1000x faster than traditional simulation. It generates synthetic logs for producing and non-producing wells to accurately estimate fluid contacts.
The document discusses ADNOC's main challenges with current simulation modeling workflows. It identifies issues with static models including fluids modeling and water saturation modeling. It also notes problems with dynamic models like transition zones between history and prediction modes. The document proposes improvements to modeling water saturation using new pressure capillary curves that better match well logs and improve history matching. It shows an example where the new curves enhanced gas-oil ratio and water cut matches after only 2 weeks of implementation. The conclusions state that addressing technical challenges requires integrated workflows and more resolution in models to better capture reservoir behaviors.
This document discusses the use of LNAPL transmissivity (Tn) in remediation design, progress evaluation, and determining endpoints. Tn is presented as an improved metric for quantifying mobile LNAPL impacts that can be determined through various field methods and recovery data analysis. The document outlines how Tn can be applied within the TRRP-32 framework, including using Tn values to select remediation technologies, calibrate models, evaluate operational performance, and determine when technical impracticability of hydraulic recovery has been reached. Threshold values of 0.3-0.8 ft2/day for Tn are presented as potential decision points for changing remediation approaches.
This is the presentation held at the NUGENIA 2017 Forum on March 29th, 2017 in Amsterdam about the CORTEX project (CORe monitoring Techniques and EXperimental validation and demonstration)
This document discusses reservoir evaluation techniques. It begins by defining reservoir evaluation as utilizing geological, geophysical, and engineering methods to understand downhole formation properties for better decision making. Key goals are estimating hydrocarbon volumes, assessing recoverable reserves, and prioritizing development. Important parameters in formation evaluation are identified as fluid composition, water saturation, size, volume, permeability, and porosity. The document also outlines technical challenges, the role of wireline logs, and the importance of reservoir evaluation for productivity and economic impact.
A team at PDVSA assembled to develop multilateral well technology in Venezuela. They screened reservoirs to identify candidates where multilateral wells could increase production and economics. A key focus was incorporating real-time downhole sensor data into reservoir models to continuously update and improve characterization. This allows technical and economic decisions to be readily made regarding massive implementation of multilateral wells in Venezuela across a wide range of reservoir types.
The document provides an overview of reservoir engineering functions and concepts. It discusses (1) estimating oil and gas reserves using volumetric and material balance methods, (2) development planning including static and dynamic reservoir modeling, and (3) production optimization such as history matching and primary/secondary/tertiary recovery. It also covers reservoir rock and fluid properties measurement including porosity, permeability, and relative permeability from core analysis. Reservoir traps are categorized as structural, stratigraphic, and combination types.
The Maritime Technological Centre (CTN) is a private technology transfer center located in Murcia, Spain. It has various laboratories, meeting rooms, and over 1,300 technical references. CTN is committed to the maritime sector and provides multidisciplinary expertise and specialized technological solutions. Its services include R&D, innovation, technology transfer, and project management. CTN works with companies and collaborates with various maritime organizations.
Well test analysis has been used for many years to assess well condition and obtain reservoir parameters. With the introduction of pressure-derivative analysis and the development of complex interpretation models that are able to account for detailed geological features, well test analysis has become a very powerful tool for reservoir characterization.
The document summarizes benchmark simulations of fluid flow in simple geometries conducted using OpenFOAM and ANSYS Fluent. Square channel and pipe flows were simulated under both laminar and turbulent conditions. Mesh refinement studies and the impact of cell aspect ratio were evaluated. Results for velocity profiles, friction factors and development lengths calculated using OpenFOAM were compared to analytical solutions and experimental data, finding good agreement within 1% error. Future work will include thermal simulations and additional geometries.
Overview of Reservoir Simulation by Prem Dayal Saini
Reservoir simulation is the study of how fluids flow in a hydrocarbon reservoir when put under production conditions. The purpose is usually to predict the behavior of a reservoir to different production scenarios, or to increase the understanding of its geological properties by comparing known behavior to a simulation using different geological representations.
La ricerca e l’innovazione tecnologica per il Servizio Idrico IntegratoServizi a rete
The document summarizes research projects conducted by SMAT Research Center in Turin, Italy. It describes the center's facilities and partnerships. It then provides brief summaries of multiple research projects, including estimating the vulnerability of groundwater resources to climate change, testing hydrodynamic cavitation for drinking water disinfection, modeling wastewater treatment plants, and developing biomethane production and an early warning water monitoring system.
This document is a graduation project presented by Carlos Gustavo Boisson Bastos to obtain a Naval Engineer degree. The project aims to use computational fluid dynamics (CFD) modeling to predict hydrodynamic loads on a floating production storage and offloading (FPSO) unit from sea currents. The CFD results will be validated by comparing them to experimental data obtained from a scale model study, with both models using the same scale ratio to avoid differences from scale effects. The advisor is Alexandre Teixeira de Pinho Alho.
This dissertation investigates introducing a center bow to the research vessel Princess Royal to improve its seakeeping characteristics and reduce wet deck slamming in head seas. The student uses computational fluid dynamics software Shipflow 6.0 to simulate the original vessel and a new model with a center bow. First, the optimal longitudinal position of the center bow is determined. Then, the heave and pitch response amplitude operators of the two models are compared across different incoming wave conditions at a cruise speed of 15 knots. Based on the simulation results, the effects on slamming pressure are also analyzed. The goal is to evaluate whether a center bow can reduce heaving and pitching motions and wet deck slamming when sailing in rough seas.
This white paper proposes a subsea separation system using cyclonic technology to improve the economic viability of developing tight, low reserve gas fields in the Southern North Sea. Computational fluid dynamics was used to verify that a cyclone unit could effectively separate solids from well fluids on the seabed. An accumulator would collect solid particles for removal by ROV, while a pipeline would transport separated gas to an offshore platform. Economic modeling indicated the proposed subsea system could reduce costs compared to conventional approaches, making marginal fields commercially feasible.
This thesis focuses on developing static and dynamic reservoir models and predicting properties for a deepwater carbonate reservoir during the early exploration phase when limited data is available. Core, log, and well test data are integrated and used to characterize the reservoir into hydraulic flow units (HFU). Five HFU are identified and upscaled to populate the static model. Well test analysis estimates permeability-thickness product and permeability with less than 20% error. Dynamic simulations of four static models match well test pressure responses and predict a numerical productivity index within 5% of measured. Simulations of the entire oil zone indicate potential recovery of 25% of original oil in place.
Masters Thesis - Exploration Phase_Deepwater Reservoir Data IntegrationAlan Mössinger
This thesis focuses on developing static and dynamic reservoir models and predicting properties for a deepwater carbonate reservoir during the early exploration phase when limited data is available. Core, log, and well test data are integrated and used to characterize the reservoir into hydraulic flow units (HFU). Five HFU are identified and upscaled to populate the static model. Well test analysis estimates permeability-thickness product and permeability with less than 20% error. Dynamic simulations of four static models match well test pressure responses and predict a numerical productivity index within 5% of measured. Simulations of the entire oil zone indicate potential recovery of 25% of original oil in place.
Pressure Loss Optimization of a Sprinkler ValveOmar Wannous
This document summarizes a bachelor's thesis on optimizing pressure loss in a sprinkler valve. The thesis involved researching fluid mechanics principles, high pressure water mist systems, and classification standards. It then conducted an extensive feasibility study and CFD simulations on the valve's design. This uncovered deviations from theoretical predictions due to simplifying assumptions. Several potential redesigned concepts were simulated, with the best concept upgraded and field tested. The final optimized design achieved the project's goal of reducing pressure loss through the valve, improving water mist system functionality for land and marine applications.
This is an in-depth course that is designed to provide the participants with a solid understanding of reservoir engineering and associated modern theories in order to manage and maximize hydrocarbon recovery. Hands-on examples and exercises are used throughout the course to help participants with understanding key performance concepts. Participants are encouraged to bring their own laptop computer to class.
Chinese shipbuilding solutions are helping shipowners reduce emissions and improve energy efficiency according to Bureau Veritas. Recent ships built in China to BV class point the way toward using LNG as fuel to meet the IMO's Tier III regulations. Examples highlighted include multi-gas carriers built by SinoPacific Group with tri-fuel engines that can use methane or ethane, and chemical tankers built by Avic Dingheng Shipbuilding with LNG fuel systems achieving Tier III compliance. Bureau Veritas is strengthening cooperation with Chinese shipbuilders through its research center in Shanghai to support innovative projects in gas transportation and other sectors.
Oil Rigs on the Moon: Aerospace and Offshore SynergiesReaching-Ultra
Author: Everett Chase | Interactive Site: www.Reaching-Ultra.com
To many observers the synergy between NASA and the offshore industry via Raytheon and Petrofac—to provide offshore training at NASA’s National Buoyancy Laboratory (NBL)—may seem as an undertaking with minimal overlap, due to the inherited features of each discipline. However, it has been more than 25 years since the following observation was made on these two disciplines (1): “There are more similarities between subsea oil drilling and aerospace projects than differences.” Because of this, offshore technology has been utilized and applied on NASA's projects, so it should be of no surprise of the offshore industry’s use of NASA’s NBL.
Our staff members at Reaching Ultra (RU) have had the opportunity of experiencing—first hand—the meshing of these two disciplines, by way of a member of our staff who attended a meeting held at the laboratory’s meeting/conference room, and by other members of our staff who re-certified their water survival and Helicopter Underwater Escape Training (HUET) at this facility. The result: giving RU a thorough experience of the multidimensional facility that caters to the offshore and aerospace industry.
This document summarizes a recommended practice for subsea leak detection systems promulgated by Det Norske Veritas in 2010 following the Deepwater Horizon event. It provides background on DNV and describes a hierarchy of offshore codes and standards. The document then reviews various subsea leak detection technologies and principles, including fiber-optic methods, and discusses designing leak detection systems, technology selection, and integrating sensors into subsea structures. Field experience with subsea leaks is also summarized, noting most leaks are small and detection of oil leaks remains challenging.
New Approach to Design Capillary Pressure Curves, which Would Improve Simulat...Faisal Al-Jenaibi
This presentation is discussing New Approach to Design Capillary Pressure Curves, which Would Improve Simulation Models Initialization and shorten History Match time consumed.
This document discusses lessons learned from recent deepwater riser projects and how risers can become more standardized industrial products. It describes an industrialization process for risers involving a technical hierarchy to systematically organize components. This allows for detailed failure mode and effects analysis (FMECA) and structured engineering. An example FMECA is provided for a hybrid riser tower (HRT) system. The analysis identified 2 high risks related to connections at the top and bottom of the HRT, in line with reliability data. Overall the FMECA found 194 medium risks and 437 low risks. The document advocates standardizing key riser design aspects like materials to improve cost effectiveness while meeting functional requirements.
Case study-lessons-learnt-methodology-and-plan-researchrs6491
This document provides background on a case study of the Rotterdam CCS Network Project. The case study aims to discover lessons for supporting future CCS projects globally and improving the Rotterdam project. CCS projects face challenges integrating diverse technologies across industrial sectors with different conventions. CCS network projects involving multiple CO2 sources and storage offer opportunities through economies of scale and accelerated deployment by integrating facilities. The Rotterdam project involves cooperation between parties to develop feasibility studies for CO2 capture and a transportation and storage network.
Experiments regarding vortex-induced vibration on floating circular cylinders with low aspect ratio were carried out in a recirculation water channel. The floating circular cylinders were elastic supported by a set of linear springs to provide low structural damping on the system. Eight different aspect ratios were tested, namely 0.2, 0.3, 0.4, 0.5, 0.75, 1.0, 1.5 and 2.0. These aspect ratios were selected to cover the aspect ratio range of the main offshore circular platforms, such as spar and monocolumn. The aims were understanding the VIM of such platforms; due to this, the cylinders were floating, or . The range of Reynolds number covered 2,800 < Re < 55,400. The amplitude results showed a decrease in amplitude with decreasing aspect ratio in both directions. The frequency results confirm a different behavior for cylinders with ; in these cases, the cylinder free-end effects were predominant. The resonant behavior was no longer observed for . The decrease in Strouhal number with decreasing aspect ratio is also verified. All the results presented here complement the work presented previously for stationary circular cylinder with low aspect ratio presented by Gonçalves et al. (2013), Experimental Study on Flow around Circular Cylinders with Low Aspect Ratio, OMAE2013-10454.
VIV em cilindros com baixarazão de aspecto e pequena razão de massaRodolfo Gonçalves
Este documento apresenta os resultados de uma investigação experimental sobre o fenômeno de vibração induzida por corrente (VIV) em cilindros com pequena razão de aspecto (L/D<3) e baixa razão de massa (m*<3). Os resultados mostram que as amplitudes de oscilação diminuem com a redução de L/D e m*, e que o número de Strouhal também diminui com L/D. Medições de PIV revelaram diferenças na esteira de vórtices para diferentes L/D.
A team at PDVSA assembled to develop multilateral well technology in Venezuela. They screened reservoirs to identify candidates where multilateral wells could increase production and economics. A key focus was incorporating real-time downhole sensor data into reservoir models to continuously update and improve characterization. This allows technical and economic decisions to be readily made regarding massive implementation of multilateral wells in Venezuela across a wide range of reservoir types.
The document provides an overview of reservoir engineering functions and concepts. It discusses (1) estimating oil and gas reserves using volumetric and material balance methods, (2) development planning including static and dynamic reservoir modeling, and (3) production optimization such as history matching and primary/secondary/tertiary recovery. It also covers reservoir rock and fluid properties measurement including porosity, permeability, and relative permeability from core analysis. Reservoir traps are categorized as structural, stratigraphic, and combination types.
The Maritime Technological Centre (CTN) is a private technology transfer center located in Murcia, Spain. It has various laboratories, meeting rooms, and over 1,300 technical references. CTN is committed to the maritime sector and provides multidisciplinary expertise and specialized technological solutions. Its services include R&D, innovation, technology transfer, and project management. CTN works with companies and collaborates with various maritime organizations.
Well test analysis has been used for many years to assess well condition and obtain reservoir parameters. With the introduction of pressure-derivative analysis and the development of complex interpretation models that are able to account for detailed geological features, well test analysis has become a very powerful tool for reservoir characterization.
The document summarizes benchmark simulations of fluid flow in simple geometries conducted using OpenFOAM and ANSYS Fluent. Square channel and pipe flows were simulated under both laminar and turbulent conditions. Mesh refinement studies and the impact of cell aspect ratio were evaluated. Results for velocity profiles, friction factors and development lengths calculated using OpenFOAM were compared to analytical solutions and experimental data, finding good agreement within 1% error. Future work will include thermal simulations and additional geometries.
Overview of Reservoir Simulation by Prem Dayal Saini
Reservoir simulation is the study of how fluids flow in a hydrocarbon reservoir when put under production conditions. The purpose is usually to predict the behavior of a reservoir to different production scenarios, or to increase the understanding of its geological properties by comparing known behavior to a simulation using different geological representations.
La ricerca e l’innovazione tecnologica per il Servizio Idrico IntegratoServizi a rete
The document summarizes research projects conducted by SMAT Research Center in Turin, Italy. It describes the center's facilities and partnerships. It then provides brief summaries of multiple research projects, including estimating the vulnerability of groundwater resources to climate change, testing hydrodynamic cavitation for drinking water disinfection, modeling wastewater treatment plants, and developing biomethane production and an early warning water monitoring system.
This document is a graduation project presented by Carlos Gustavo Boisson Bastos to obtain a Naval Engineer degree. The project aims to use computational fluid dynamics (CFD) modeling to predict hydrodynamic loads on a floating production storage and offloading (FPSO) unit from sea currents. The CFD results will be validated by comparing them to experimental data obtained from a scale model study, with both models using the same scale ratio to avoid differences from scale effects. The advisor is Alexandre Teixeira de Pinho Alho.
This dissertation investigates introducing a center bow to the research vessel Princess Royal to improve its seakeeping characteristics and reduce wet deck slamming in head seas. The student uses computational fluid dynamics software Shipflow 6.0 to simulate the original vessel and a new model with a center bow. First, the optimal longitudinal position of the center bow is determined. Then, the heave and pitch response amplitude operators of the two models are compared across different incoming wave conditions at a cruise speed of 15 knots. Based on the simulation results, the effects on slamming pressure are also analyzed. The goal is to evaluate whether a center bow can reduce heaving and pitching motions and wet deck slamming when sailing in rough seas.
This white paper proposes a subsea separation system using cyclonic technology to improve the economic viability of developing tight, low reserve gas fields in the Southern North Sea. Computational fluid dynamics was used to verify that a cyclone unit could effectively separate solids from well fluids on the seabed. An accumulator would collect solid particles for removal by ROV, while a pipeline would transport separated gas to an offshore platform. Economic modeling indicated the proposed subsea system could reduce costs compared to conventional approaches, making marginal fields commercially feasible.
This thesis focuses on developing static and dynamic reservoir models and predicting properties for a deepwater carbonate reservoir during the early exploration phase when limited data is available. Core, log, and well test data are integrated and used to characterize the reservoir into hydraulic flow units (HFU). Five HFU are identified and upscaled to populate the static model. Well test analysis estimates permeability-thickness product and permeability with less than 20% error. Dynamic simulations of four static models match well test pressure responses and predict a numerical productivity index within 5% of measured. Simulations of the entire oil zone indicate potential recovery of 25% of original oil in place.
Masters Thesis - Exploration Phase_Deepwater Reservoir Data IntegrationAlan Mössinger
This thesis focuses on developing static and dynamic reservoir models and predicting properties for a deepwater carbonate reservoir during the early exploration phase when limited data is available. Core, log, and well test data are integrated and used to characterize the reservoir into hydraulic flow units (HFU). Five HFU are identified and upscaled to populate the static model. Well test analysis estimates permeability-thickness product and permeability with less than 20% error. Dynamic simulations of four static models match well test pressure responses and predict a numerical productivity index within 5% of measured. Simulations of the entire oil zone indicate potential recovery of 25% of original oil in place.
Pressure Loss Optimization of a Sprinkler ValveOmar Wannous
This document summarizes a bachelor's thesis on optimizing pressure loss in a sprinkler valve. The thesis involved researching fluid mechanics principles, high pressure water mist systems, and classification standards. It then conducted an extensive feasibility study and CFD simulations on the valve's design. This uncovered deviations from theoretical predictions due to simplifying assumptions. Several potential redesigned concepts were simulated, with the best concept upgraded and field tested. The final optimized design achieved the project's goal of reducing pressure loss through the valve, improving water mist system functionality for land and marine applications.
This is an in-depth course that is designed to provide the participants with a solid understanding of reservoir engineering and associated modern theories in order to manage and maximize hydrocarbon recovery. Hands-on examples and exercises are used throughout the course to help participants with understanding key performance concepts. Participants are encouraged to bring their own laptop computer to class.
Chinese shipbuilding solutions are helping shipowners reduce emissions and improve energy efficiency according to Bureau Veritas. Recent ships built in China to BV class point the way toward using LNG as fuel to meet the IMO's Tier III regulations. Examples highlighted include multi-gas carriers built by SinoPacific Group with tri-fuel engines that can use methane or ethane, and chemical tankers built by Avic Dingheng Shipbuilding with LNG fuel systems achieving Tier III compliance. Bureau Veritas is strengthening cooperation with Chinese shipbuilders through its research center in Shanghai to support innovative projects in gas transportation and other sectors.
Oil Rigs on the Moon: Aerospace and Offshore SynergiesReaching-Ultra
Author: Everett Chase | Interactive Site: www.Reaching-Ultra.com
To many observers the synergy between NASA and the offshore industry via Raytheon and Petrofac—to provide offshore training at NASA’s National Buoyancy Laboratory (NBL)—may seem as an undertaking with minimal overlap, due to the inherited features of each discipline. However, it has been more than 25 years since the following observation was made on these two disciplines (1): “There are more similarities between subsea oil drilling and aerospace projects than differences.” Because of this, offshore technology has been utilized and applied on NASA's projects, so it should be of no surprise of the offshore industry’s use of NASA’s NBL.
Our staff members at Reaching Ultra (RU) have had the opportunity of experiencing—first hand—the meshing of these two disciplines, by way of a member of our staff who attended a meeting held at the laboratory’s meeting/conference room, and by other members of our staff who re-certified their water survival and Helicopter Underwater Escape Training (HUET) at this facility. The result: giving RU a thorough experience of the multidimensional facility that caters to the offshore and aerospace industry.
This document summarizes a recommended practice for subsea leak detection systems promulgated by Det Norske Veritas in 2010 following the Deepwater Horizon event. It provides background on DNV and describes a hierarchy of offshore codes and standards. The document then reviews various subsea leak detection technologies and principles, including fiber-optic methods, and discusses designing leak detection systems, technology selection, and integrating sensors into subsea structures. Field experience with subsea leaks is also summarized, noting most leaks are small and detection of oil leaks remains challenging.
New Approach to Design Capillary Pressure Curves, which Would Improve Simulat...Faisal Al-Jenaibi
This presentation is discussing New Approach to Design Capillary Pressure Curves, which Would Improve Simulation Models Initialization and shorten History Match time consumed.
This document discusses lessons learned from recent deepwater riser projects and how risers can become more standardized industrial products. It describes an industrialization process for risers involving a technical hierarchy to systematically organize components. This allows for detailed failure mode and effects analysis (FMECA) and structured engineering. An example FMECA is provided for a hybrid riser tower (HRT) system. The analysis identified 2 high risks related to connections at the top and bottom of the HRT, in line with reliability data. Overall the FMECA found 194 medium risks and 437 low risks. The document advocates standardizing key riser design aspects like materials to improve cost effectiveness while meeting functional requirements.
Case study-lessons-learnt-methodology-and-plan-researchrs6491
This document provides background on a case study of the Rotterdam CCS Network Project. The case study aims to discover lessons for supporting future CCS projects globally and improving the Rotterdam project. CCS projects face challenges integrating diverse technologies across industrial sectors with different conventions. CCS network projects involving multiple CO2 sources and storage offer opportunities through economies of scale and accelerated deployment by integrating facilities. The Rotterdam project involves cooperation between parties to develop feasibility studies for CO2 capture and a transportation and storage network.
Similar to Numerical Offshore Tank - Description (20)
Experiments regarding vortex-induced vibration on floating circular cylinders with low aspect ratio were carried out in a recirculation water channel. The floating circular cylinders were elastic supported by a set of linear springs to provide low structural damping on the system. Eight different aspect ratios were tested, namely 0.2, 0.3, 0.4, 0.5, 0.75, 1.0, 1.5 and 2.0. These aspect ratios were selected to cover the aspect ratio range of the main offshore circular platforms, such as spar and monocolumn. The aims were understanding the VIM of such platforms; due to this, the cylinders were floating, or . The range of Reynolds number covered 2,800 < Re < 55,400. The amplitude results showed a decrease in amplitude with decreasing aspect ratio in both directions. The frequency results confirm a different behavior for cylinders with ; in these cases, the cylinder free-end effects were predominant. The resonant behavior was no longer observed for . The decrease in Strouhal number with decreasing aspect ratio is also verified. All the results presented here complement the work presented previously for stationary circular cylinder with low aspect ratio presented by Gonçalves et al. (2013), Experimental Study on Flow around Circular Cylinders with Low Aspect Ratio, OMAE2013-10454.
VIV em cilindros com baixarazão de aspecto e pequena razão de massaRodolfo Gonçalves
Este documento apresenta os resultados de uma investigação experimental sobre o fenômeno de vibração induzida por corrente (VIV) em cilindros com pequena razão de aspecto (L/D<3) e baixa razão de massa (m*<3). Os resultados mostram que as amplitudes de oscilação diminuem com a redução de L/D e m*, e que o número de Strouhal também diminui com L/D. Medições de PIV revelaram diferenças na esteira de vórtices para diferentes L/D.
Estudo Experimental do Movimento Induzido por Vórtices (VIM) em Plataforma Se...Rodolfo Gonçalves
Este documento resume um estudo experimental sobre o movimento induzido por vórtices (VIM) em uma plataforma semi-submersível (SS). O objetivo do estudo foi identificar a ocorrência ou não de VIM em SS sob diversas condições de aproamento, presença de ondas e nível de amortecimento. O estudo variou parâmetros como aproamento, amortecimento e calado e analisou os resultados de movimento transversal, no plano XY e de yaw. Os resultados preliminares mostraram que o VIM ocorre principalmente entre 5 < V
Vibrações Induzidas pela Emissão de Vórtices em Cilindros com Baixa Razão de ...Rodolfo Gonçalves
Este documento apresenta uma tese de doutorado sobre vibrações induzidas por vórtices em cilindros com baixa razão de aspecto. O objetivo da tese é entender os fundamentos fluidodinâmicos responsáveis pelo fenômeno estudando cilindros estacionários e oscilantes com razão de aspecto entre 0,1 e 2,0 através de ensaios e visualizações do escoamento. Os resultados são comparados com a literatura para cilindros de alta razão de aspecto e relacionados ao problema de vibrações em plata
OMAE2013-10454: Experimental Study on Flow Around Circular Cylinders with Low...Rodolfo Gonçalves
Experiments were carried out in a recirculating water channel regarding the flow around stationary circular cylinders with low aspect ratio piercing the water free surface. Eight different aspect ratios were tested, namely L/D= 0.1, 0.2, 0.3, 0.5, 0.75, 1.0, 1.5 and 2.0; this range corresponds to aspect ratio related to circular offshore systems, such as spar and monocolumn platforms. Force was measured using a six degree-of-freedom load cell and Strouhal number is inferred through the transverse force fluctuation frequency. The range of Reynolds number covers 10,000 < Re < 50,000. PIV measurements were performed in some aspect ratio cases, namely 0.3, 0.5, 1.0 and 2.0 for Reynolds number equal to 43,000. The results showed a decrease in drag force coefficients with decreasing aspect ratio, as well as a decrease in Strouhal number with decreasing aspect ratio. The PIV showed the existence of an arch-type vortex originated in the cylinder free end.
ISOPE2012-TPC145: Vortex-Induced Yaw Motion (VIY) of a Large-Volume Semi-Subm...Rodolfo Gonçalves
Vortex-Induced Yaw Motion (VIY) was studied experimentally on a large-volume semi-submersible platform considering four different current incidence angles, 0, 15, 30 and 45 degrees. The results showed a synchronization range of reduced velocities from 6 up to 8, this one defined by means of the yaw natural motion period in still water. The maximum angular amplitude of yaw was approximately 5 degrees, verified for the 0 degree incidence. This periodic yaw motion of large amplitudes, together with the well known translational motions, named Vortex-Induced Motion (VIM), may contribute negatively to the fatigue life of mooring lines and risers; therefore, this new modality of yaw synchronization should be taken into account during the design of semi-submersible platforms. Furthermore, the effects of the lower draft condition and damping on this new type of synchronization were addressed, showing they are important for the model tests because they contribute to decreasing the yaw amplitudes.
TPN is a research laboratory specialized in linking academic knowledge and ships and offshore industry needs.
Numerical and experimental work developed by over 40 people and spin-off companies in:
•Model testing.
•Ships and offshore hydrodynamics and stability.
•Risers and mooring.
•Manoeuvring and DP.
•Offshore operations and installations.
•Development of in-house analysis software.
•3D visualization.
•Simulations.
OMAE2009-79380: Mitigation of Vortex-Induced Motions of a Monocolumn PlatformRodolfo Gonçalves
A great deal of works has been developed on the Spar VIM issue. There are, however, very few published works concerning VIM of monocolumn platforms, partly due to the fact that the concept is fairly recent and the first unit was only installed last year. In this context, the present paper presents a meticulous study on VIM for this type of platform concept. Model test experiments were performed to check the influence of many factors on VIM, such as different headings, wave/current coexistence, different drafts, suppression elements, and the presence of risers. The results of the experiments presented here are inline and cross-flow motion amplitudes, ratios of actual oscillation and natural periods, and motions in the XY plane. This is, therefore, a very extensive and important data set for comparisons and validations of theoretical and numerical models for VIM prediction.
OMAE2009-79378: Vortex-Induced Motion of a Monocolumn Platform: New Analysis ...Rodolfo Gonçalves
This presentation presents a new analysis and a comparison of results obtained from Vortex-Induced Motion (VIM) model tests of the MonoGoM platform, a floating unit designed for the Gulf of Mexico. The choice of scale between the model and the platform in which the tests took place was a very important issue that took into account the basin dimensions and mooring design. The tests were performed in three different basins: the IPT Towing Tank in Brazil (September 2005), the NMRI Model Ship Experimental Towing Tank in Japan (March 2007) and the NMRI Experimental Tank in Japan (June 2008. The objective of this work is to discuss the most relevant issues regarding the concept, execution and procedures to analyze comparatively the results obtained from model tests. The approach employed in the tests was designed to build a reliable data set for comparison with theoretical and numerical models for VIM prediction, especially that of Monocolumn platforms.
OMAE2009-79431: A Phenomenological Model for Vortex-Induced Motions of the Mo...Rodolfo Gonçalves
Vortex-Induced Motions (VIM) of floating structures is a very relevant subject for the design of mooring and riser systems. In the design phase, Spar VIM behavior as well as Semi Submersible and Tension Leg Platform (TLP) flow-induced motions are studied and evaluated. This paper discusses flow-induced behavior on the Monocolumn concept by presenting a phenomenological model and comparing its results with a set of experiments that took place in the IPT Towing Tank - Brazil (September 2008). The experimental results have shown some fundamental differences from previous VIM tests on other units such as Spars. This numerical model attempts to identify these disparities in order to better understand the mechanics of this phenomenon.
The model is based on a time-domain, two degree-of-freedom structural model coupled with a van der Pol type wake oscillator. The comparison was performed in order to calibrate the model, to study and better understand the tests results, and finally to identify important aspects to investigate in further experiments.
OMAE2011-4910: Experimental Study on Vortex-Induced Motions (VIM) of a Large-...Rodolfo Gonçalves
A great deal of work has been developed on the spar and monocolumn vortex-induced motion (VIM) issue. However, there are very few published works concerning VIM of semi-submersible platforms, partly due to the fact that VIM studies for this type of platform recently became interesting particularly due to the increasing semi-submersible dimensions (columns diameter and height. In this context, a meticulous experimental study on VIM for this type of platform concept is presented here. Model test experiments were performed to check the influence of many factors on VIM, such as different headings and hull appendages. The results comply with in-line, cross-flow and yaw motion amplitudes, as well as with combined motions in the XY plane.
OMAE2011-4910: Experimental Study on Vortex-Induced Motions (VIM) of a Large-...
Numerical Offshore Tank - Description
1. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
TPN - Tanque de Provas Numérico: Uma Infra-Estrutura Inovadora
para Os Novos Desafios da Produção Brasileira
Os atuais desafios impostos pela produção offshore no Brasil têm demandado o
desenvolvimento de ferramentas de projeto e análise cada vez mais precisas e robustas no que
tange à abordagem dos problemas inerentes às atividades desta natureza.
São comuns pesquisas que contam com uma abordagem analítico-numérica,
concomitante a uma abordagem experimental responsável pela geração de resultados para
confrontação e calibração.
O TPN, neste contexto, é uma iniciativa brasileira inovadora caracterizada por uma
infra-estrutura aparelhada com dois elementos principais: um cluster para simulações
numéricas com sala de projeção 3D e um tanque físico especificamente construído para
calibração dos coeficientes hidrodinâmicos de uso no simulador.
Em linhas gerais, o cluster para simulações numéricas é dotado de um conjunto de
processadores trabalhando em paralelo, compondo uma capacidade de 50 teraflops. A
visualização das simulações, por sua vez, conta com um ambiente de realidade virtual, no qual
o expectador tem a possibilidade de interagir com os resultados e, até mesmo, experimentar
parte dos comportamentos dinâmicos dos sistemas em estudo através de um hexapod.
O tanque físico, denominado Calibrador Hidrodinâmico, é uma infra-estrutura
experimental voltada ao estudo de modelos em escala reduzida, cuja característica principal é
a geração de ondas multidirecionais e concomitante absorção das mesmas.
Em resumo, com estas inovações o TPN se habilita como uma infra-estrutura alinhada
às demandas atuais, servindo não só aos novos desenvolvimentos do cenário de produção
nacional de petróleo offshore, como também à formação de recursos humanos
especificamente voltados à atuação no segmento científico-tecnológico brasileiro.
Palavras-chave: Tanque de provas numeric (TPN); cluster de alta performance; de provas
com absorção ativa de ondas; multidisciplinaridade; novas pesquisas e desenvolvimento.
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2. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
TPN – Numerical Offshore tank: an Innovative Infrastructure to the
New Brazilian Production Challenges
Abstract
It is quite evident that the new researches and developments in offshore oil production
have became considerably more complex as a consequence of the recent growing in the
demand and, therefore, the necessity of exploration in ultra deep water. Higher number of
operational conditions has being analyzed, taking into account simultaneous phenomena,
many of them in high level of complexity. In order to provide solutions and answers for many
of the problems involved in such scenario, a multidisciplinary approach, combining analytical
models, numerical tools and experimental activities, has being quite convenient and,
sometimes, the only prospective alternative. According to this philosophy, the Numerical
Offshore Tank - TPN was idealized to work through a cooperative approach. In its new
infrastructure, TPN has a high performance cluster of 50 TeraFLOPS, which runs an
integrated and multitask set of analytical models and numerical tools for a wide diversity of
operational conditions of new offshore and naval architecture projects. In addition, TPN has
an hydrodynamic basin, with active wave absorption, specifically dedicated to generate
experimental results for comparison purpose and, in specific cases, for validation of design
hypothesis and, eventually, new analytical models. This paper presents the main
characteristics of the new TPN, emphasizing capacities and, at the same time, discussing its
limitations. Further researches and developments are prospected based on this new facility, as
well as on the experience accumulated during the last years.
Keywords: Numerical Offshore Tank; high performance cluster; hydrodynamic basin with
active wave absorption; multidisciplinary approach; new researches and developments.
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3. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
1. Introduction
Brazil is currently one of the world leaders in deep and ultra deep water oil and natural
gas exploration as a result of extensive technological research program and strong
investments in exploration technologies.
Among others, the main particularity of the Brazilian oil and gas resources is its
location, along the coast in water depths up to three thousand meters deep. This makes
exploration more difficult and requires the development of new technologies, demanding the
increase of initial investments.
The exploration is performed making use of different types of anchored floating
production units, typically FPSOs or semi-submersibles. The risers and mooring system are
essential elements to extract oil from reservoir and connecting the floating platform to the sea
bed. The risers are pipes allowing the oil outflow from the reservoir and, depending on the
prevailing conditions, are of the rigid or flexible types. Conversely, the mooring lines are
responsible for holding the floating structure in a specific position and can be made of chain,
polyester and other synthetic ropes or a combination of these and are connected to the sea bed
by using anchors.
According to this scenario, there is also the need for special care on validation of the
production units before any start of operation begins. In general, the design requires extensive
small-scale tests at the laboratory. Through wave makers, fans and other systems, the model
tests in basins are able to reproduce the main environmental conditions that the production
units will be subjected to, such as winds, waves and currents, as well as to reproduce the
dynamics of mooring lines and risers.
One of the main challenges in model tests is the selection of the scale. The correct
choice of the model scale is important to represent, in reduced dimensions, the real
phenomena in study, details for this procedure can be found for example in Chakrabarti, S.K.
(1994). The combination of the ultra deep water and the large dimensions of the production
units make strongly difficult to select the model scale in order to represent all the behavior of
these complex systems. For example, in the typical tests basins, it is difficult to represent
correctly the mooring lines and riser system together with the floating unit. Moreover, a large
range of operational conditions must be analyzed experimentally, which involves long time
and expressive amount of capital.
In order to solve these problems, the TPN was created. The Numerical Offshore Tank or
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4. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
TPN is a computational hydrodynamic laboratory for design and analysis on offshore systems,
ships and barges developed for the design and analysis of ships and floating structures
involving the joint efforts of a multidisciplinary expertise team and close partnership among
different universities, research institutes and Petrobras.
Due to the extreme complexity of representing the actual physical phenomena and the
requirement of being able to analyze a particular case in a reasonable and feasible time frame,
the simulator, with an exceptionally large computational power, was inaugurated in February
2002.
To meet the new challenges of high productivity, stringent standards and top quality
research, the TPN carried out a complete modernization of its physical and technological
infra-structure, including the long awaited construction of a dedicated facility, see Figure 1.
Located aside the Department of Naval Architecture and Oceanic Engineering of the Escola
Politécnica, at the University of São Paulo – USP, the new TPN’s lab facility considering:
• A time-domain multi-body dynamic analysis software and a 3D visualization
room for pos-processed analysis;
• A computer cluster composed by high performance processors, enabling parallel
computing to solve the numerical simulations;
• A hydrodynamic basin, the test facility with active wave generation/absorption.
Figure 1: The actual TPN counts with a new cluster and 3D visualization room, as well as a dedicated
hydrodynamic basin for calibration of the numerical simulator.
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5. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
2. The Numerical Offshore Tank Activities
The Numerical Offshore Tank was developed to provide an innovative technological
testing facility and to revolutionize the floating structure research field. It was a unique
technological laboratory in the international scientific community.
By means of its researcher center, during the past few years TPN has been involved
with many important studies, among them:
• Various up and running PETROBRAS units have undergone TPN testing,
including P18 and P43, which were the first units to serve as simulator
calibrators;
• Platforms P51 and P52 have also been analyzed by the TPN. Other units such as
P19 still require evaluation in specific operation regimes;
• In 2002, the docking simulation of the Brazilian Navy’s Aircraft carrier Nae São
Paulo was carried out. Because of the small size of the dry dock, there were
serious lateral constraints for the docking operation which required a meticulous
modeling of every single detail of the dry dock, aircraft carrier and surroundings
before the actual full scale operation could take place. The undertaken study was
indispensable for the successful conclusion of the operation;
• Another case study was the Load-Out of the Brazilian Navy’s Timbira
submarine. Structural calculations were conducted for the ramp and the barge
that would transport the submarine. A specific software was created to simulate
the barge ballasting operation and a video, demonstrating the whole operation,
was produced;
• On top of Petrobras’ complete production units, various non-conventional
analyses were performed by TPN. One example was the movement of shuttle
tank near a new PLEM – Pipe Line End Manifold. The concern was that during
offloading operations the ship could crash into the PLEM. The simulation of the
operation was made in the numeric simulator and the result was viewed in
TPNView;
• Another simulation analyzed a sub surface buoy, joining two types of units: a
semi-submersible and a FPSO type vessel. The dynamic stability was verified,
as were tensions in moorings and risers. Damaged conditions were analyzed in
the buoy’s cables and the moorings of the floating unit;
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6. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
• The design of new offshore systems, including detailed seakeeping and stability
analyses:
o MonoGoM, see Costa, A.P. et al. (2005);
o FPSO-BR, see Cueva, D. et al. (2005);
o MonoBR with dry tree capability, see Gonçalves, R.T. et al.(2008) and
Matsumoto, F.T. et al. (2008);
o FPSO-TLWP, see Malta, E.B. et al. (2009) and Rampazzo, F.P. et al.
(2009);
• The design and analyses of mooring and risers system, see Rampazzo, F.P.,
Masetti, I.Q. & Nishimoto, K. (2008);
• Experimental and phenomenological results for fluid-structure interaction:
o Vortex-Induced Vibrations (VIV) in risers, see Rosetti, G.F., Nishimoto,
K. & Wilde, J. (2009);
o Vortex-Induced Motions (VIM) in monocolumn platforms, see
Gonçalves, R.T. et al. (2009) and Fujarra, A.L.C. et al. (2009);
• Moving particle semi-implicit method (MPS), see Maeda, H. et al. (2004) and
Tsukamoto, M.M., Cheng, L.Y. & Nishimoto, K. (2009).
Figure 2 presents some examples of the new design developed in TPN, particularly the
MonoBR and FPSO-BR.
Figure 2: Examples of new designs developed at TPN.
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7. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
3. The Computer Cluster
The modernization efforts included the implementation of a new cluster comprised of a
large number of parallel processing units reaching a 50 TeraFLOPS capacity and, therefore,
allowing high speed numerical simulations and integration with similar clusters available at
Petrobras research centers.
To complement this capacity, a viewing room equipped with leading edge virtual reality
equipment is available, enabling a clearer understanding of the analysis results and deeper
immersion on the research findings. It features a high definition projection system and a six
degree-of-freedom seating capability. Some pictures took before the operational condition are
presented in Figure 3.
Figure 3: Illustration of the new cluster and 3D visualization room.
The numerical simulator developed by TPN is a computer based program capable of
representing full scale conditions with the advantage of not being restricted by the geometric
and physical constraints restrictions model test basins. Its capabilities include the detailed
representation of the floating system motion dynamics, the evaluation of different mooring
and rises arrangements and large spectra of environmental conditions.
Its basic architecture consists of a pre-processor (scientific software), parallelized
processor (core) and post processor (visualization software).
In order to provide a compatible and systematic entry procedure for the extremely large
amount of geometric, physical and environmental data, the TPN team carried out the
development and implementation of the pre-processing program PREA3D which is capable of
guaranteeing the coherence among the data as well as in speeding up the input process.
The software’s core is based on mathematical models that represent the system
dynamics equations and, integrated along time steps, allows the actual motion of the floating
system to be simulated. To evaluate the various external loadings acting on the floating unit,
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8. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
the numerical software makes use of a group of auxiliary hydrodynamic and structural codes.
Among them, the software WAMIT obtains the hydrodynamic coefficients of the wave
dynamic response, ANFLEX and PREADYN are responsible for the line dynamics
calculation and SLOSHING estimates the effect of the liquid movement in ballast or oil tanks.
The simulator’s generated information includes such a large amount of data that it is
quite impossible to analyze them by conventional means. As a consequence, the software
TPNView was developed with resources not only for providing a fundamental tool for
integrated data analysis but also for creating a new scientific virtual reality environment.
The software combines a 3D visualization of the actual motions of the floating system,
of the risers and mooring lines and of the environment waves as well as dynamic analysis
tools such as graphs, histograms and statistics.
4. The Hydrodynamic Basin
As part of the new TPN’s lab facility, the hydrodynamic basin with active absorber has
the main objective of generating a large experimental data base, such as motions,
hydrodynamic forces and coefficients. This data base will be applied for checking and
improving the theoretical models, enabling the simulator to represent as accurate as possible
the full scale dynamic behavior of the analyzed systems. One example is the study of the
second-order motions for large structures; see Simos, A.L. et al. (2008).
The hydrodynamic basin consists of a 14m x 14m rectangular wave tank with depth of
4m with an all around multi-directional wave absorption and generation system based on 148
flap-type wave makers. A graphical illustration of the facility, a picture before commissioning
and the main dimensions are presented in Figure 4.
The system was designed to generate waves in frequency ranging from 0.25 to 3.00Hz
and maximum wave height of 0.40m (considering the limits of the mechanical system and the
theoretical wave breaking limit of 14% in steepness). Details about the control system of the
flaps and dimensions one can be found in de Mello, P.C. et al. (2007).
Wave generation limits can be visualized in Figure 5, by means of the intersection
between limit areas according to the wave steepness, tank height, flap stroke and screw
velocity. In the same figure it is possible to see the typical centenarian spectrum of some
offshore basins under exploration around the world, particularly: Golf of Mexico (USA),
Campos Basin (Brazil) and Tupi Basin (Brazil) for reference scale model equal to 1:100.
Pág: 8 de 8
9. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
Figure 5 shows that the new TPN’s hydrodynamic basin was appropriated design for
generating wave excitation of the most important scenarios of offshore oil production.
Figure 4: Graphical views and picture before commissioning of the new wave basin.
Limite de Curso
Limite de Declividade
Onda máxima
0.5
Limite de Velocidade do atuador
Centenária GoM
0.4 Centenária BC
Centenária Tupi
H (m)
0.3
0.2
0.1
0
0.5 1 1.5 2 2.5 3
freq (Hz)
Figure 5: Wave height versus frequency limits forthe new hydrodynamic basin.
The instrumentation used in the hydrodynamic basin is the most modern in monitoring
technology. The motion can be registered through six degree-of-freedom video monitoring
and also by conventional methods using accelerometers, rate-gyros (for velocity) and degree
Pág: 9 de 9
10. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
sensors.
For free surface monitoring ultrasonic wave probe were specifically developed for the
TPN’s hydrodynamic basin; details about this can be found in de Mello, P.C. et al. (2007).
The advantage of this apparatus in comparison with the conventional capacitive probe is the
facility of calibration that implies a reduced time in the tests.
Due to its faster operation and lower cost compare to similar facilities, it is important to
emphasize that one of the complementary objectives of the TPN’s hydrodynamic basin will be
to develop human resources specifically trained to work in the experimental research for naval
and ocean developments.
5. Conclusion
This paper presented the new TPN’s lab facility composed by: a 50 TeraFLOPS cluster
and a 3D visualization room, which will increase enormously its simulation capacity, and a
hydrodynamic basin for small-scale tests aiming to achieve paradigms for theoretical models
calibration.
Compared to the similar facilities in Brazil, the new TPN’s hydrodynamic basin has a
unique characteristic which means the concomitant generation and absorption of waves. This
peculiar aspect gives to this new basin the capacity to perform long time experiments,
appropriated for studying non-linear phenomena.
The TPN is an innovative and integrated system that brings high technology to naval
and ocean engineering, and thus becomes a fundamental tool for the recent developments.
Together with the principal Brazilian research institutes and Petrobras, TPN works to
ensure that Brazil continues to be efficiently exploring oil in deeper waters, as well as
developing technologies in the state of art.
References
Chakrabarti, S.K. (1994). Offshore Structure Modeling. Advanced Series on Ocean
Engineering.
Costa, A.P., Masetti, I.Q., Cueva, M., Nishimoto, K., Machado, G. & Corte, A. (2005).
Development of a Mono-Column Type Unit for Harsh Environment. Proceedings of the
11th International Congress of the International Maritime Association of the Mediterranean
– IMAM, Lisbon, Portugal.
Pág: 10 de 10
11. Santos Offshore Conference 2009
21 a 23 de Outubro de 2009 - Mendes Convention Center - Santos - São Paulo - Brasil
Cueva, D., Campos, F., Donato, M., Ferrari, J.A., Torres, F. & Nishimoto, N. (2005).
Dimensional Study for Brazilian FPSO. Proceedings of the 24th International Conference
on Offshore Mechanics and Artic Engineering. OMAE2005-67333.
Fujarra, A. L., Gonçalves, R. T., Faria, F., Nishimoto, K., Cueva, M., & Siqueira, E. F.
(2009). Mitigation of Vortex-Induced Motions of a Monocolumn Platform. Proceedings of
the 28th International Conference on Ocean, Offshore and Arctic Engineering.
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Gonçalves, R.T., Matsumoto, F.T., Medeiros, H.F., Brinati, H.L., Nishimoto, K. & Masetti,
I.Q. (2008). Conceptual Design of Floating Production and Storage with Dry Tree
Capability. Proceedings of the 27th International Conference on Offshore Mechanics and
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Gonçalves, R. T., Fujarra, A. L., Rosetti, G. F., Nishimoto, K., Cueva, M., & Siqueira, E. F.
(2009). Vortex-Induced Motion of a Monocolumn Platform: New Analysis and
Comparative Study. Proceedings of the 28th International Conference on Ocean, Offshore
and Artic Engineering. OMAE2009-79378.
Maeda, H., Nishimoto, K., Masuda, K., Asanuma, T., Tsukamoto, M.M. & Ikoma, T. (2004).
Numerical Analysis for Hydrodynamic Motions of Floating Structures Using MPS Method.
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Malta, E.B., Rampazzo, F.P., Cruz, R.E., Oliveira, A.L. & Nishimoto, K. (2009). FPSO and
TLWP Interacting at a Reduced Distance for Dry Tree Completion System. Proceedings of
the 28th International Conference on Ocean, Offshore and Artic Engineering. OMAE2009-
79098.
Matsumoto, F.T., Gonçalves, R.T., Malta, E.B., Medeiros, H.F., Nishimoto, K. & Masetti,
I.Q. (2008). The Influence at Vertical First Order Motions Using a Appendages in a
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de Mello, P.C., Carneiro, M.L., Casetta, L., Simos, A.N., Adamowski, J.C. & Nishimoto, K.
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12. Santos Offshore Conference 2009
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Numerical Offshore Tank for Ultra Deep Water Oil Production Systems. Proceedings of
the 22nd International Conference on Offshore Mechanics and Arctic Engineering.
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Rampazzo, F.P., Masetti, I.Q. & Nishimoto, K. (2008). The Mooring System Design
MONOBR Platform for Harsh Environmental Conditions (GoM). 20th Ocean Engineering
Symposium, Tokio, Japan.
Rampazzo, F.P., Malta, E.B., Watai, R.A., Cruz, R.E. & Nishimoto, K. (2009). Design of an
Innovative FPSO-TLWP Coupled System Based on the Numerical Offshore Tank (TPN)
Methodology. Proceedings of the 10th International Marine Design Conference – IMDC,
Trondheim, Norway.
Rosetti, G. F., Nishimoto, K. & Jaap de Wilde. (2009). Vortex-Induced Vibrations on Flexible
Cylindrical Structures Coupled with Non-Linear Oscillators. Proceedings of the 28th
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Simos, A.L., Sparano, J.V., Aranha, J.A.P. & Matos, V.L.F. (2008). 2nd Order
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Tsukamoto, M.M., Cheng, L.Y. & Nishimoto, K. (2009). Numerical Study of the Motions in
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