The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform
Peixue Jiang - One of the best experts on this subject based on the ideXlab platform.
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numerical investigation of fluid flow and heat transfer in a doublet enhanced geothermal system with co2 as the working fluid co2 egs
Energy, 2014Co-Authors: Ruina Xu, Peixue JiangAbstract:Enhanced geothermal system with CO2 instead of water as the working fluid (CO2–EGS ) has attracted much interest due to the additional benefit of CO2 geological storage during the power generation process. This paper describes numerical analyses of a doublet CO2–EGS system, focusing on the influence of the CO2 injection rate, the permeability of induced fractures near the Wellbores, the injection/production Well Perforation placement, the working fluid, and the heat transfer between the Wellbores and the surrounding reservoir. The larger permeability in the induced fractures around the Wellbores allows the fluid to more easily flow through the reservoir up to a critical fracture permeability, with further increases of the fracture permeability further reducing the pressure loss a little but the cost is not worth the added benefit. Induced fractures around the Wellbores result in little difference among different Wellbores Perforation locations in the reservoir. Increased CO2 injection rates reduce the heat transfer between the Wellbores and the surrounding reservoir so that this heat transfer can be neglected at large mass flow rates. With CO2 as the working fluid, the CO2 temperature decreases significantly going up the production Well. This paper presents some important implications for CO2–EGS system for further numerical studies as Well as for practical projects.
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numerical investigation of the influence of vertical permeability heterogeneity in stratified formation and of injection production Well Perforation placement on co2 geological storage with enhanced ch4 recovery
Applied Energy, 2013Co-Authors: Feng Luo, Peixue JiangAbstract:Depleted natural gas fields provide promising CO2 storage sites with the additional benefit of enhancing natural gas recovery. This paper performs numerical investigations of CO2 storage with enhanced CH4 recovery (CSEGR) in large stratified reservoirs with neglecting the absence of aqueous phase in the reservoir, focusing on the influence of the reservoir vertical permeability heterogeneity and injection/production Well Perforation placement. The reservoir vertical permeability heterogeneity accelerates the CO2 transport in the reservoir resulting in less CO2 storage than in a homogeneous reservoir during the EGR process, with this unwelcome effect increasing as the reservoir vertical heterogeneity increases. The effects of the injection and production Well Perforation placement on the CSEGR performance are investigated for two reservoirs with different ratios of horizontal to vertical permeabilities. Placing both the injection and production Well Perforation in the lowest permeability layer gives the best CO2 storage for both modeled layered reservoirs. However, the Well Perforation placements for the best CH4 recovery differ for the two reservoirs. In addition, the CO2 storage, CH4 recovery, injection power and cost of modifying the Well Perforations also affect the determination of the optimal Well Perforation placements with the best Well Perforation placements for the overall performance also differ for the two layered reservoirs.
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numerical study of the influence of injection production Well Perforation location on co2 egs system
Energy Procedia, 2013Co-Authors: Feng Luo, Peixue JiangAbstract:The novel concept of enhanced geothermal system with CO2 instead of water as working fluid (CO2-EGS) has attracted wide attention due to additional benefit of CO2 geological storage during the power generation process. In this research, numerical investigation on a doublet CO2-EGS system is performed, focusing on the influence of the injection/production Well Perforation location in the targeted geothermal reservoir. Three different reservoir inlet and outlet boundary conditions are used in simulations since the Well constrains are different in reality. The results show that CO2-EGS system performance of power generation and power cost vary greatly among cases of different Wells Perforation locations, and the optimum options under different boundary conditions are also different.
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Numerical investigation of the influence of vertical permeability heterogeneity in stratified formation and of injection/production Well Perforation placement on CO2 geological storage with enhanced CH4 recovery
Applied Energy, 2013Co-Authors: Feng Luo, Peixue JiangAbstract:Depleted natural gas fields provide promising CO2 storage sites with the additional benefit of enhancing natural gas recovery. This paper performs numerical investigations of CO2 storage with enhanced CH4 recovery (CSEGR) in large stratified reservoirs with neglecting the absence of aqueous phase in the reservoir, focusing on the influence of the reservoir vertical permeability heterogeneity and injection/production Well Perforation placement. The reservoir vertical permeability heterogeneity accelerates the CO2 transport in the reservoir resulting in less CO2 storage than in a homogeneous reservoir during the EGR process, with this unwelcome effect increasing as the reservoir vertical heterogeneity increases. The effects of the injection and production Well Perforation placement on the CSEGR performance are investigated for two reservoirs with different ratios of horizontal to vertical permeabilities. Placing both the injection and production Well Perforation in the lowest permeability layer gives the best CO2 storage for both modeled layered reservoirs. However, the Well Perforation placements for the best CH4 recovery differ for the two reservoirs. In addition, the CO2 storage, CH4 recovery, injection power and cost of modifying the Well Perforations also affect the determination of the optimal Well Perforation placements with the best Well Perforation placements for the overall performance also differ for the two layered reservoirs.
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Numerical Study of the Influence of Injection/Production Well Perforation Location On Co2-EGS System
Energy Procedia, 2013Co-Authors: Feng Luo, Peixue JiangAbstract:The novel concept of enhanced geothermal system with CO2 instead of water as working fluid (CO2-EGS) has attracted wide attention due to additional benefit of CO2 geological storage during the power generation process. In this research, numerical investigation on a doublet CO2-EGS system is performed, focusing on the influence of the injection/production Well Perforation location in the targeted geothermal reservoir. Three different reservoir inlet and outlet boundary conditions are used in simulations since the Well constrains are different in reality. The results show that CO2-EGS system performance of power generation and power cost vary greatly among cases of different Wells Perforation locations, and the optimum options under different boundary conditions are also different.
Feng Luo - One of the best experts on this subject based on the ideXlab platform.
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numerical investigation of the influence of vertical permeability heterogeneity in stratified formation and of injection production Well Perforation placement on co2 geological storage with enhanced ch4 recovery
Applied Energy, 2013Co-Authors: Feng Luo, Peixue JiangAbstract:Depleted natural gas fields provide promising CO2 storage sites with the additional benefit of enhancing natural gas recovery. This paper performs numerical investigations of CO2 storage with enhanced CH4 recovery (CSEGR) in large stratified reservoirs with neglecting the absence of aqueous phase in the reservoir, focusing on the influence of the reservoir vertical permeability heterogeneity and injection/production Well Perforation placement. The reservoir vertical permeability heterogeneity accelerates the CO2 transport in the reservoir resulting in less CO2 storage than in a homogeneous reservoir during the EGR process, with this unwelcome effect increasing as the reservoir vertical heterogeneity increases. The effects of the injection and production Well Perforation placement on the CSEGR performance are investigated for two reservoirs with different ratios of horizontal to vertical permeabilities. Placing both the injection and production Well Perforation in the lowest permeability layer gives the best CO2 storage for both modeled layered reservoirs. However, the Well Perforation placements for the best CH4 recovery differ for the two reservoirs. In addition, the CO2 storage, CH4 recovery, injection power and cost of modifying the Well Perforations also affect the determination of the optimal Well Perforation placements with the best Well Perforation placements for the overall performance also differ for the two layered reservoirs.
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numerical study of the influence of injection production Well Perforation location on co2 egs system
Energy Procedia, 2013Co-Authors: Feng Luo, Peixue JiangAbstract:The novel concept of enhanced geothermal system with CO2 instead of water as working fluid (CO2-EGS) has attracted wide attention due to additional benefit of CO2 geological storage during the power generation process. In this research, numerical investigation on a doublet CO2-EGS system is performed, focusing on the influence of the injection/production Well Perforation location in the targeted geothermal reservoir. Three different reservoir inlet and outlet boundary conditions are used in simulations since the Well constrains are different in reality. The results show that CO2-EGS system performance of power generation and power cost vary greatly among cases of different Wells Perforation locations, and the optimum options under different boundary conditions are also different.
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Numerical investigation of the influence of vertical permeability heterogeneity in stratified formation and of injection/production Well Perforation placement on CO2 geological storage with enhanced CH4 recovery
Applied Energy, 2013Co-Authors: Feng Luo, Peixue JiangAbstract:Depleted natural gas fields provide promising CO2 storage sites with the additional benefit of enhancing natural gas recovery. This paper performs numerical investigations of CO2 storage with enhanced CH4 recovery (CSEGR) in large stratified reservoirs with neglecting the absence of aqueous phase in the reservoir, focusing on the influence of the reservoir vertical permeability heterogeneity and injection/production Well Perforation placement. The reservoir vertical permeability heterogeneity accelerates the CO2 transport in the reservoir resulting in less CO2 storage than in a homogeneous reservoir during the EGR process, with this unwelcome effect increasing as the reservoir vertical heterogeneity increases. The effects of the injection and production Well Perforation placement on the CSEGR performance are investigated for two reservoirs with different ratios of horizontal to vertical permeabilities. Placing both the injection and production Well Perforation in the lowest permeability layer gives the best CO2 storage for both modeled layered reservoirs. However, the Well Perforation placements for the best CH4 recovery differ for the two reservoirs. In addition, the CO2 storage, CH4 recovery, injection power and cost of modifying the Well Perforations also affect the determination of the optimal Well Perforation placements with the best Well Perforation placements for the overall performance also differ for the two layered reservoirs.
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Numerical Study of the Influence of Injection/Production Well Perforation Location On Co2-EGS System
Energy Procedia, 2013Co-Authors: Feng Luo, Peixue JiangAbstract:The novel concept of enhanced geothermal system with CO2 instead of water as working fluid (CO2-EGS) has attracted wide attention due to additional benefit of CO2 geological storage during the power generation process. In this research, numerical investigation on a doublet CO2-EGS system is performed, focusing on the influence of the injection/production Well Perforation location in the targeted geothermal reservoir. Three different reservoir inlet and outlet boundary conditions are used in simulations since the Well constrains are different in reality. The results show that CO2-EGS system performance of power generation and power cost vary greatly among cases of different Wells Perforation locations, and the optimum options under different boundary conditions are also different.
Hao Wang - One of the best experts on this subject based on the ideXlab platform.
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study of downhole shock loads for ultra deep Well Perforation and optimization measures
Energies, 2019Co-Authors: Qiao Deng, Hui Zhang, Xuejun Hou, Hao WangAbstract:Ultra-deep Well Perforation is an important direction for the development of unconventional oil and gas resources, the security with shock loads is a difficult technical problem. Firstly, the theoretical analysis of perforated string is carried out, the dynamics models of which are established in the directions of axial, radial and circumferential. Secondly, the process of perforating with hundreds of bullets is simulated by using the software of LS-DYNA (ANSYS, Inc, Pennsylvania, USA). The propagation attenuation model of shock loads is established, and a calculation model to predict shock loads at different positions of the tubing interval has been fitted by considering multiple factors. The dynamic response of perforated string is studied, and the vulnerable parts of which are found out. Thirdly, the optimization measures are put forward for ultra-deep Well Perforation by the design of shock adsorption and safety distance of the packer. Finally, the field case of an ultra-deep Well shows that the research method in this paper is practical, and the optimization measures are reasonable and effective. This study can provide important guidance to reduce shock damage and improve security for ultra-deep Well Perforation.
Qiao Deng - One of the best experts on this subject based on the ideXlab platform.
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study of downhole shock loads for ultra deep Well Perforation and optimization measures
Energies, 2019Co-Authors: Qiao Deng, Hui Zhang, Xuejun Hou, Hao WangAbstract:Ultra-deep Well Perforation is an important direction for the development of unconventional oil and gas resources, the security with shock loads is a difficult technical problem. Firstly, the theoretical analysis of perforated string is carried out, the dynamics models of which are established in the directions of axial, radial and circumferential. Secondly, the process of perforating with hundreds of bullets is simulated by using the software of LS-DYNA (ANSYS, Inc, Pennsylvania, USA). The propagation attenuation model of shock loads is established, and a calculation model to predict shock loads at different positions of the tubing interval has been fitted by considering multiple factors. The dynamic response of perforated string is studied, and the vulnerable parts of which are found out. Thirdly, the optimization measures are put forward for ultra-deep Well Perforation by the design of shock adsorption and safety distance of the packer. Finally, the field case of an ultra-deep Well shows that the research method in this paper is practical, and the optimization measures are reasonable and effective. This study can provide important guidance to reduce shock damage and improve security for ultra-deep Well Perforation.
Hui Zhang - One of the best experts on this subject based on the ideXlab platform.
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study of downhole shock loads for ultra deep Well Perforation and optimization measures
Energies, 2019Co-Authors: Qiao Deng, Hui Zhang, Xuejun Hou, Hao WangAbstract:Ultra-deep Well Perforation is an important direction for the development of unconventional oil and gas resources, the security with shock loads is a difficult technical problem. Firstly, the theoretical analysis of perforated string is carried out, the dynamics models of which are established in the directions of axial, radial and circumferential. Secondly, the process of perforating with hundreds of bullets is simulated by using the software of LS-DYNA (ANSYS, Inc, Pennsylvania, USA). The propagation attenuation model of shock loads is established, and a calculation model to predict shock loads at different positions of the tubing interval has been fitted by considering multiple factors. The dynamic response of perforated string is studied, and the vulnerable parts of which are found out. Thirdly, the optimization measures are put forward for ultra-deep Well Perforation by the design of shock adsorption and safety distance of the packer. Finally, the field case of an ultra-deep Well shows that the research method in this paper is practical, and the optimization measures are reasonable and effective. This study can provide important guidance to reduce shock damage and improve security for ultra-deep Well Perforation.
