The Experts below are selected from a list of 1023 Experts worldwide ranked by ideXlab platform
John M Shaw - One of the best experts on this subject based on the ideXlab platform.
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fate of organic liquid crystal domains during Steam assisted gravity drainage Cyclic Steam Stimulation production of heavy oils and bitumen
Energy & Fuels, 2017Co-Authors: Mildred Becerra, John M ShawAbstract:The fate and impacts of hydrocarbon-based amphotropic liquid-crystal-rich domains (a recently identified material class found in hydrocarbon resources) during production transport and refining are unknown. New materials and process knowledge on this topic will contribute to parsing impacts currently attributed to asphaltenes or other crude oil fractions. In this qualitative work, the fate of liquid-crystal-rich domains in Steam-assisted gravity drainage (SAGD) and Cyclic Steam Stimulation (CSS) production environments is surveyed, using a combined laboratory and field study. In the laboratory, a fraction of liquid-crystal-rich domains present in Athabasca bitumen is shown to transfer to the water-rich phase under simulated SAGD and CSS conditions and transfer mechanisms are discussed. In the field study, liquid-crystal-rich domain transfer from Peace River and Athabasca bitumen to process water during SAGD production is demonstrated. Transferred liquid-crystal-rich domains are subsequently captured in sur...
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Fate of Organic Liquid-Crystal Domains during Steam-Assisted Gravity Drainage/Cyclic Steam Stimulation Production of Heavy Oils and Bitumen
Energy & Fuels, 2017Co-Authors: Mildred Becerra, John M ShawAbstract:The fate and impacts of hydrocarbon-based amphotropic liquid-crystal-rich domains (a recently identified material class found in hydrocarbon resources) during production transport and refining are unknown. New materials and process knowledge on this topic will contribute to parsing impacts currently attributed to asphaltenes or other crude oil fractions. In this qualitative work, the fate of liquid-crystal-rich domains in Steam-assisted gravity drainage (SAGD) and Cyclic Steam Stimulation (CSS) production environments is surveyed, using a combined laboratory and field study. In the laboratory, a fraction of liquid-crystal-rich domains present in Athabasca bitumen is shown to transfer to the water-rich phase under simulated SAGD and CSS conditions and transfer mechanisms are discussed. In the field study, liquid-crystal-rich domain transfer from Peace River and Athabasca bitumen to process water during SAGD production is demonstrated. Transferred liquid-crystal-rich domains are subsequently captured in sur...
Yanyong Wang - One of the best experts on this subject based on the ideXlab platform.
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experimental investigation and field pilot testing of air assisted Cyclic Steam Stimulation technique for enhanced heavy oil recovery
International Journal of Oil Gas and Coal Technology, 2019Co-Authors: Yanyong Wang, Liang Zhang, Junyu Deng, Zhiwu Gong, Changhao HuAbstract:Air assisted Cyclic Steam Stimulation (AACSS) process is a novel technique for enhanced heavy oil recovery, which is efficient and economically attractive compared with other non-condensable gases and solvents injection-based techniques. In this study, the performance of AACSS process for an ultra heavy oil reservoir was investigated via laboratory experiments and field data analysis. The results indicate that air injection based on Steam Stimulation can effectively increase oil recovery in comparison with the conventional Cyclic Steam Stimulation (CSS) process. The injected air can significantly increase and maintain the reservoir pressure, and reduce oil viscosity via flue gas dissolution and the thermal effect of low temperature oxidation (LTO) of the crude oil. The field pilot testing results of the AACSS technique in Liaohe Oilfield (Northeast China) demonstrate that AACSS can significantly increase oil production, prolong the effective production period of time, reduce water cut and the Steam to oil ratio. A scoping economic study shows that the AACSS process can be more economically attractive than CSS process in terms of net present value. The AACSS technique has been effectively applied in mature heavy oil reservoirs developed by the conventional CSS, and it is also a feasible option to deep and offshore heavy oil reservoirs. [Received: January 6, 2017; Accepted: August 10, 2017]
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mechanistic simulation study of air injection assisted Cyclic Steam Stimulation through horizontal wells for ultra heavy oil reservoirs
Journal of Petroleum Science and Engineering, 2019Co-Authors: Yanyong Wang, Liang ZhangAbstract:Abstract Air injection assisted Cyclic Steam Stimulation (CSS) through horizontal wells is a new technique for the exploitation of ultra heavy oil reservoirs, which has an advantage over other gas or solvent injection processes from the economic point of view. Different from in-situ combustion (ISC) process, the dominating chemical reactions occurring underground in air injection assisted CSS process are low temperature oxidation (LTO) reactions, and owing to the complicated LTO reaction mechanism, this process is still not clearly understood. Therefore, an indepth learning of this process will be of great benefit to its field application and specific project design. In this study, a comprehensive numerical simulation model was established, which accounted for the LTO reactions of different oil components in terms of SARA fractions, as well as permeability reduction induced by coke deposition. A series of simulations were then performed to explore the production performance and elucidate the impacts of various factors. The simulation results demonstrate that air injection assisted CSS using horizontal wells can enhance ultra heavy oil recovery and reduce cSOR in comparison with Steam injection alone, which can be attributed to the synergistic effect of Steam and air coinjection. Injection of air along with Steam can have the same effect as the initial solution gas in reservoir, and the potential of air injection assisted CSS to enhance oil recovery will be more pronounced in oil layers with lean solution gas. In addition, normal air injection can be a viable choice considering the free availability of air, and injection of oxygen-reduced air can become a good option for ultra heavy oils featured with poor LTO reactivity for the sake of safe production.
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numerical study of air assisted Cyclic Steam Stimulation process for heavy oil reservoirs recovery performance and energy efficiency analysis
Fuel, 2018Co-Authors: Yanyong Wang, Liang Zhang, Xiyi PengAbstract:Abstract Cyclic Steam Stimulation (CSS) has been widely applied as an effective technique for heavy oil reservoirs, but it is increasingly concerned in recent years for its limited oil recovery performance, low energy efficiency, high water consumption and great environmental footprints due to greenhouse gas emissions. The hybrid injection of air and Steam in terms of low temperature oxidation (LTO) is an innovative technique for the development of heavy oil reservoirs, which can be operated based on the conventional well configuration and was firstly proposed as an enhanced oil recovery (EOR) process for mature heavy oil reservoirs encountered with low reservoir pressure, poor Steam sweep efficiency and high water cut. In this study, numerical simulation study is conducted to evaluate the potentials of air assisted Cyclic Steam Stimulation (AACSS) process as an alternative to CSS technique for heavy oil reservoirs. Effects of oil viscosity, LTO reaction and operated air to Steam ratio on the well performance are examined for typical heavy oils. The results indicate that AACSS process can effectively improve oil recovery, enhance the energy efficiency and reduce CO2 emissions in comparison with CSS alone, which can be attributed to the thermal effect due to oil oxidation, reservoir repressurization and gas driving offered by air injection, and the AACSS process can be more economically and environmentally attractive than CSS alone. The production performance of AACSS process for ultra heavy oil reservoirs can be more pronounced in comparison with that of ordinary heavy oils, and the LTO characteristics of different oils and the feasible air to Steam ratio are reservoir specific for field operation.
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an innovative air assisted Cyclic Steam Stimulation technique for enhanced heavy oil recovery
Journal of Petroleum Science and Engineering, 2017Co-Authors: Yanyong Wang, Liang Zhang, Junyu Deng, Yuting Wang, Changhao HuAbstract:Abstract Air assisted Cyclic Steam Stimulation (AACSS) is an innovative technique for enhanced heavy oil recovery, in which air is injected along with Steam injection during a conventional CSS process. It can be applied for heavy or ultra heavy oil reservoirs in the late stage of CSS process to increase the performance of Steam injection and mitigate the problems of low reservoir pressure, poor Steam sweep efficiency and high water cut. In this study, the application of the AACSS technique in a typical ultra heavy oil reservoir of Liaohe oilfield (China) was described and its field performances were analyzed along with a numerical reservoir simulation study to reveal its mechanism. The field data shows that the AACSS can significantly increase oil production, reduce water cut and prolong the effective production period. A reaction model for the oxidation of heavy oil components with oxygen in the temperature range of 50–300 °C was established, based on the experimental results of thermogravimetric analysis (TGA), to simulate the conversion of air into flue gas and its thermal effect. The performance of AACSS was investigated and the contribution of thermal effect induced by LTO reactions was analyzed through numerical simulation. The simulation results indicate that air injection can improve oil recovery on the basis of CSS, in which over 11% of the incremental oil production can be attributed to the thermal effect, and the rest is accounted for a complex effect of flue gas driving.
Liang Zhang - One of the best experts on this subject based on the ideXlab platform.
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experimental investigation and field pilot testing of air assisted Cyclic Steam Stimulation technique for enhanced heavy oil recovery
International Journal of Oil Gas and Coal Technology, 2019Co-Authors: Yanyong Wang, Liang Zhang, Junyu Deng, Zhiwu Gong, Changhao HuAbstract:Air assisted Cyclic Steam Stimulation (AACSS) process is a novel technique for enhanced heavy oil recovery, which is efficient and economically attractive compared with other non-condensable gases and solvents injection-based techniques. In this study, the performance of AACSS process for an ultra heavy oil reservoir was investigated via laboratory experiments and field data analysis. The results indicate that air injection based on Steam Stimulation can effectively increase oil recovery in comparison with the conventional Cyclic Steam Stimulation (CSS) process. The injected air can significantly increase and maintain the reservoir pressure, and reduce oil viscosity via flue gas dissolution and the thermal effect of low temperature oxidation (LTO) of the crude oil. The field pilot testing results of the AACSS technique in Liaohe Oilfield (Northeast China) demonstrate that AACSS can significantly increase oil production, prolong the effective production period of time, reduce water cut and the Steam to oil ratio. A scoping economic study shows that the AACSS process can be more economically attractive than CSS process in terms of net present value. The AACSS technique has been effectively applied in mature heavy oil reservoirs developed by the conventional CSS, and it is also a feasible option to deep and offshore heavy oil reservoirs. [Received: January 6, 2017; Accepted: August 10, 2017]
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mechanistic simulation study of air injection assisted Cyclic Steam Stimulation through horizontal wells for ultra heavy oil reservoirs
Journal of Petroleum Science and Engineering, 2019Co-Authors: Yanyong Wang, Liang ZhangAbstract:Abstract Air injection assisted Cyclic Steam Stimulation (CSS) through horizontal wells is a new technique for the exploitation of ultra heavy oil reservoirs, which has an advantage over other gas or solvent injection processes from the economic point of view. Different from in-situ combustion (ISC) process, the dominating chemical reactions occurring underground in air injection assisted CSS process are low temperature oxidation (LTO) reactions, and owing to the complicated LTO reaction mechanism, this process is still not clearly understood. Therefore, an indepth learning of this process will be of great benefit to its field application and specific project design. In this study, a comprehensive numerical simulation model was established, which accounted for the LTO reactions of different oil components in terms of SARA fractions, as well as permeability reduction induced by coke deposition. A series of simulations were then performed to explore the production performance and elucidate the impacts of various factors. The simulation results demonstrate that air injection assisted CSS using horizontal wells can enhance ultra heavy oil recovery and reduce cSOR in comparison with Steam injection alone, which can be attributed to the synergistic effect of Steam and air coinjection. Injection of air along with Steam can have the same effect as the initial solution gas in reservoir, and the potential of air injection assisted CSS to enhance oil recovery will be more pronounced in oil layers with lean solution gas. In addition, normal air injection can be a viable choice considering the free availability of air, and injection of oxygen-reduced air can become a good option for ultra heavy oils featured with poor LTO reactivity for the sake of safe production.
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numerical study of air assisted Cyclic Steam Stimulation process for heavy oil reservoirs recovery performance and energy efficiency analysis
Fuel, 2018Co-Authors: Yanyong Wang, Liang Zhang, Xiyi PengAbstract:Abstract Cyclic Steam Stimulation (CSS) has been widely applied as an effective technique for heavy oil reservoirs, but it is increasingly concerned in recent years for its limited oil recovery performance, low energy efficiency, high water consumption and great environmental footprints due to greenhouse gas emissions. The hybrid injection of air and Steam in terms of low temperature oxidation (LTO) is an innovative technique for the development of heavy oil reservoirs, which can be operated based on the conventional well configuration and was firstly proposed as an enhanced oil recovery (EOR) process for mature heavy oil reservoirs encountered with low reservoir pressure, poor Steam sweep efficiency and high water cut. In this study, numerical simulation study is conducted to evaluate the potentials of air assisted Cyclic Steam Stimulation (AACSS) process as an alternative to CSS technique for heavy oil reservoirs. Effects of oil viscosity, LTO reaction and operated air to Steam ratio on the well performance are examined for typical heavy oils. The results indicate that AACSS process can effectively improve oil recovery, enhance the energy efficiency and reduce CO2 emissions in comparison with CSS alone, which can be attributed to the thermal effect due to oil oxidation, reservoir repressurization and gas driving offered by air injection, and the AACSS process can be more economically and environmentally attractive than CSS alone. The production performance of AACSS process for ultra heavy oil reservoirs can be more pronounced in comparison with that of ordinary heavy oils, and the LTO characteristics of different oils and the feasible air to Steam ratio are reservoir specific for field operation.
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an innovative air assisted Cyclic Steam Stimulation technique for enhanced heavy oil recovery
Journal of Petroleum Science and Engineering, 2017Co-Authors: Yanyong Wang, Liang Zhang, Junyu Deng, Yuting Wang, Changhao HuAbstract:Abstract Air assisted Cyclic Steam Stimulation (AACSS) is an innovative technique for enhanced heavy oil recovery, in which air is injected along with Steam injection during a conventional CSS process. It can be applied for heavy or ultra heavy oil reservoirs in the late stage of CSS process to increase the performance of Steam injection and mitigate the problems of low reservoir pressure, poor Steam sweep efficiency and high water cut. In this study, the application of the AACSS technique in a typical ultra heavy oil reservoir of Liaohe oilfield (China) was described and its field performances were analyzed along with a numerical reservoir simulation study to reveal its mechanism. The field data shows that the AACSS can significantly increase oil production, reduce water cut and prolong the effective production period. A reaction model for the oxidation of heavy oil components with oxygen in the temperature range of 50–300 °C was established, based on the experimental results of thermogravimetric analysis (TGA), to simulate the conversion of air into flue gas and its thermal effect. The performance of AACSS was investigated and the contribution of thermal effect induced by LTO reactions was analyzed through numerical simulation. The simulation results indicate that air injection can improve oil recovery on the basis of CSS, in which over 11% of the incremental oil production can be attributed to the thermal effect, and the rest is accounted for a complex effect of flue gas driving.
Mildred Becerra - One of the best experts on this subject based on the ideXlab platform.
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fate of organic liquid crystal domains during Steam assisted gravity drainage Cyclic Steam Stimulation production of heavy oils and bitumen
Energy & Fuels, 2017Co-Authors: Mildred Becerra, John M ShawAbstract:The fate and impacts of hydrocarbon-based amphotropic liquid-crystal-rich domains (a recently identified material class found in hydrocarbon resources) during production transport and refining are unknown. New materials and process knowledge on this topic will contribute to parsing impacts currently attributed to asphaltenes or other crude oil fractions. In this qualitative work, the fate of liquid-crystal-rich domains in Steam-assisted gravity drainage (SAGD) and Cyclic Steam Stimulation (CSS) production environments is surveyed, using a combined laboratory and field study. In the laboratory, a fraction of liquid-crystal-rich domains present in Athabasca bitumen is shown to transfer to the water-rich phase under simulated SAGD and CSS conditions and transfer mechanisms are discussed. In the field study, liquid-crystal-rich domain transfer from Peace River and Athabasca bitumen to process water during SAGD production is demonstrated. Transferred liquid-crystal-rich domains are subsequently captured in sur...
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Fate of Organic Liquid-Crystal Domains during Steam-Assisted Gravity Drainage/Cyclic Steam Stimulation Production of Heavy Oils and Bitumen
Energy & Fuels, 2017Co-Authors: Mildred Becerra, John M ShawAbstract:The fate and impacts of hydrocarbon-based amphotropic liquid-crystal-rich domains (a recently identified material class found in hydrocarbon resources) during production transport and refining are unknown. New materials and process knowledge on this topic will contribute to parsing impacts currently attributed to asphaltenes or other crude oil fractions. In this qualitative work, the fate of liquid-crystal-rich domains in Steam-assisted gravity drainage (SAGD) and Cyclic Steam Stimulation (CSS) production environments is surveyed, using a combined laboratory and field study. In the laboratory, a fraction of liquid-crystal-rich domains present in Athabasca bitumen is shown to transfer to the water-rich phase under simulated SAGD and CSS conditions and transfer mechanisms are discussed. In the field study, liquid-crystal-rich domain transfer from Peace River and Athabasca bitumen to process water during SAGD production is demonstrated. Transferred liquid-crystal-rich domains are subsequently captured in sur...
Xiansong Zhang - One of the best experts on this subject based on the ideXlab platform.
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hybrid optimization technique for Cyclic Steam Stimulation by horizontal wells in heavy oil reservoir
Computers & Chemical Engineering, 2016Co-Authors: Kang Zhou, Hui Zhao, Xiaodong Kang, Shutao Wang, Xiansong ZhangAbstract:Abstract With the rapid depletion of conventional oil resource, economical and efficient exploitation of heavy oil reservoirs is one of the most effective ways to meet future energy demand. This paper establishes an efficient parametric optimization method for Cyclic Steam Stimulation (CSS) by horizontal wells in heavy oil reservoirs. The net present value (NPV) of a CSS project is maximized by optimizing operational parameters using a new hybrid optimization technique. This hybrid technique is developed by integrating uniform design (UD) into the initialization process of conventional particle swarm optimization (PSO). Case study reveals that initializing PSO with UD can improve the quality of initial particles in conventional PSO and thus speed up its convergence rate. Simulation results indicate that parametric optimization using the hybrid technique is able to obtain the best CSS development strategy for heavy oil reservoirs on both technical and economic sides.
