提升航空器运行效率,获取航空运输利益最大化,是中国民航一直以来追求的目标。研究表明,EoR进近(Established on RNP AR)在提升近距平行跑道运行效率方面具有不可替代的优势,因此受到业界广泛关注。将EoR进近与排序策略结合,以航班延误...提升航空器运行效率,获取航空运输利益最大化,是中国民航一直以来追求的目标。研究表明,EoR进近(Established on RNP AR)在提升近距平行跑道运行效率方面具有不可替代的优势,因此受到业界广泛关注。将EoR进近与排序策略结合,以航班延误时间最小为目标函数,建立基于EoR的排序模型。对比分析基于EoR的独立运行与相关运行对航班延误时间的影响。针对大规模航班排序计算时解空间较大且要求时效性的特点,提出一种基于S形函数的自适应粒子群优化算法(S-shaped function based adaptive particle swarm optimization,SA-PSO)对模型进行求解。以昆明长水国际机场终端区为例进行实例验证,尾流安全间隔上,采用中国民航航空器尾流重新分类(RECAT-CN)运行标准。结果表明:EoR独立运行较相关运行减少总延误约38%、EoR独立运行模式下,本文算法较先到先服务(first come first served,FCFS)算法减少总延误约15.3%。展开更多
Carbon capture,utilization,and storage(CCUS)represents a critical technological pathway for global car-bon emission reduction.CCUS-enhanced oil recovery(EOR)technology is the most feasible CCUS technol-ogy demonstrati...Carbon capture,utilization,and storage(CCUS)represents a critical technological pathway for global car-bon emission reduction.CCUS-enhanced oil recovery(EOR)technology is the most feasible CCUS technol-ogy demonstrating dual benefits of enhanced energy production and carbon reduction.This study comprehensively described the key influencing factors governing CO_(2)-EOR and geological storage and systematically analyzed reservoir properties,fluid characteristics,and operational parameters.The mech-anisms of these parameters on EOR versus CO_(2) storage performance were investigated throughout CCUS-EOR processes.This paper proposes a coupled two-stage CCUS-EOR process:CO_(2)-EOR storage stage and long-term CO_(2) storage stage after the CO_(2) injection phase is completed.In each stage,the main control factors impacting the CO_(2)-EOR and storage stages are screened and coupled with rigorous technical anal-ysis.The key factors here are reservoir properties,fluid characteristics,and operational parameter.A novel CCUS-EOR synergistic method was proposed to optimize the lifecycle performance of dual objective of EOR and storage.Furthermore,based on multi-objective optimization,considering the lifecycle,a multi-scale techno-economic evaluation method was proposed to fully assess the CCUS-EOR project per-formance.Finally,a set of recommendations for advancing CCUS-EOR technologies by deploying multi-factor/multi-field coupling methodologies,novel green intelligent injection materials,and artificial intel-ligence/machine learning technologies were visited.展开更多
The sandy conglomerate reservoir is tight and exhibits strong heterogeneity,rendering conventional water flooding and gas drive methods inefficient and challenging for the effective development.CO_(2) water alternatin...The sandy conglomerate reservoir is tight and exhibits strong heterogeneity,rendering conventional water flooding and gas drive methods inefficient and challenging for the effective development.CO_(2) water alternating gas(CO_(2)-WAG)injection as an effective enhanced oil recovery(EOR)method has been applied in heterogeneous reservoirs.Simultaneously,it facilitates carbon sequestration,contributing to the green and low-carbon transformation of energy.However,the EOR mechanisms and influencing factors are still unclear for the development of heterogeneous sandy conglomerate reservoirs.In this paper,we conducted core flooding experiments combined nuclear magnetic resonance(NMR)technology to investigate EOR mechanisms of the CO_(2)-WAG injection on the multiscale(reservoir,layer,and pore).The study compared multiscale oil recovery in sandy conglomerate reservoirs under both miscible and immiscible conditions,while also analyzing the effects of water-gas ratio and injection rate.In the immiscible state,the CO_(2)-WAG displacement achieves an oil recovery of approximately 22.95%,representing a 7.82%increase compared to CO_(2) flooding.This method effectively inhibits CO_(2) breakthrough in high-permeability layers while enhancing the oil recovery in medium-and low-permeability layers.Furthermore,CO_(2)-WAG displacement improves the microscopic oil displacement efficiency within mesopores and micropores.As the water-gas ratio increases,the total oil recovery rises,with enhanced oil recovery in low-permeability layers and micropores.Moreover,a gradual increase in injection rate leads to a decrease in total oil recovery,but it leads to an increase in oil recovery from low-permeability sandy conglomerate layers and micropores.In the miscible state,the displacement efficiency of CO_(2)-WAG is significantly enhanced,the total oil recovery three times higher than that in the immiscible state.In particular,the oil recovery from low permeability layers and micropores has further improved.Additionally,experimental results indicate that parameters such as water-gas ratio and injection rate do not significantly affect the oil recovery of CO_(2)-WAG miscible displacement.Therefore,maintaining the reservoir pressure above the minimum miscible pressure is the key to maximizing ultimate recovery factor in these reservoirs.展开更多
Carbon dioxide-enhanced oil recovery(CO_(2)-EOR)and storage is recognized as an economically feasible technique if used in suitable reservoirs.The type or form and capacity of this CO_(2) sequestration technique is sy...Carbon dioxide-enhanced oil recovery(CO_(2)-EOR)and storage is recognized as an economically feasible technique if used in suitable reservoirs.The type or form and capacity of this CO_(2) sequestration technique is synergistically affected by heat,flow,stress,and chemical reactions.Aimed at addressing the technological issues in applying CO_(2)-EOR and storage in a high water-cut reservoir in Xinjiang,China,this paper proposes a thermo-hydro-mechanical-chemical coupling method during CO_(2) flooding.The potential of CO_(2) sequestration and EOR in the target reservoir is discussed in combination with the surrogate optimization method.This method works better as it considers the evolution of structural trapping,capillary trapping,solubility trapping,and mineral trapping during CO_(2) injection as well as the influence the physical field has on the sequestration capacity for different forms of CO_(2) sequestration.The main mechanisms of CO_(2) sequestration in the high water-cut reservoir is structural trapping,followed by capillary trapping.Solubility trapping and mineral trapping have less contribution to the total sequestration capacity of CO_(2).After optimization,the cumulative oil production was 2.36×10^(6)m^(3),an increase of 0.25×10^(6)m3or 11.9%compared to the pre-optimization value.The CO_(2) sequestration capacity after optimization was 1.39×10^(6)t,which is an increase of 0.23×10^(6)t compared to values obtained before optimization;this effectively increases the area affected by CO_(2) by 24.4%.Of the four trapping mechanisms,capillary trapping and structural trapping showed a high increase of 32.5%and17.28%,respectively,while solubility trapping and mineral trapping only led to an increase of 5.1%and0.43%,respectively.This research could provide theoretical support for fully utilizing the potential of CO_(2)-EOR and sequestration technology.展开更多
This study documents pioneering results in marginal wells in Texas,where the application of RDV-00■restored production through delayed protonic activation catalyzed by reservoir energy.The product,based on RDV■(Vaso...This study documents pioneering results in marginal wells in Texas,where the application of RDV-00■restored production through delayed protonic activation catalyzed by reservoir energy.The product,based on RDV■(Vasoactive Dynamic Reactor)technology,operates via:Controlled protonation of molecular structures;Release of energetic carbocations;Autonomous transformation without external inputs.(a)Case 1(Well#E2-Starr County):Certified as“dry”by RRC(2022)after 48 months at 0 BPD;8 months post-injection of 5 gal RDV-00■(Fluid column:37 bbl;Wellhead pressure:80 psi(vs.0 psi initially)).(b)Case 2(Well#P1-Luling Field):Historical stripper well(0.25-0.5 BPD);23 months of immobilization with 15 gal RDV-00■;Critical results:(1)Initial production:42 BPD(8,400%above baseline);(2)Shut-in wellhead pressure:40 psi(neighboring wells=0-3 psi);(3)Current behavior:Continuous recharge from reservoir(well shut-in due to lack of storage).(c)Technically Significant Observations:(1)First case of self-sustaining reactivation in depleted wells;(2)Mechanism validated by Autonomous pressure generation(0→40-80 psi),and Continuous flow without additional stimulation;(3)No documented precedents in SPE/OnePetro literature to our knowledge.展开更多
文摘提升航空器运行效率,获取航空运输利益最大化,是中国民航一直以来追求的目标。研究表明,EoR进近(Established on RNP AR)在提升近距平行跑道运行效率方面具有不可替代的优势,因此受到业界广泛关注。将EoR进近与排序策略结合,以航班延误时间最小为目标函数,建立基于EoR的排序模型。对比分析基于EoR的独立运行与相关运行对航班延误时间的影响。针对大规模航班排序计算时解空间较大且要求时效性的特点,提出一种基于S形函数的自适应粒子群优化算法(S-shaped function based adaptive particle swarm optimization,SA-PSO)对模型进行求解。以昆明长水国际机场终端区为例进行实例验证,尾流安全间隔上,采用中国民航航空器尾流重新分类(RECAT-CN)运行标准。结果表明:EoR独立运行较相关运行减少总延误约38%、EoR独立运行模式下,本文算法较先到先服务(first come first served,FCFS)算法减少总延误约15.3%。
基金the financial support from the National Key Research and Development Program of China(2022YFE0206700)the Science Foundation of China University of Petroleum,Beijing(2462021YJRC012).
文摘Carbon capture,utilization,and storage(CCUS)represents a critical technological pathway for global car-bon emission reduction.CCUS-enhanced oil recovery(EOR)technology is the most feasible CCUS technol-ogy demonstrating dual benefits of enhanced energy production and carbon reduction.This study comprehensively described the key influencing factors governing CO_(2)-EOR and geological storage and systematically analyzed reservoir properties,fluid characteristics,and operational parameters.The mech-anisms of these parameters on EOR versus CO_(2) storage performance were investigated throughout CCUS-EOR processes.This paper proposes a coupled two-stage CCUS-EOR process:CO_(2)-EOR storage stage and long-term CO_(2) storage stage after the CO_(2) injection phase is completed.In each stage,the main control factors impacting the CO_(2)-EOR and storage stages are screened and coupled with rigorous technical anal-ysis.The key factors here are reservoir properties,fluid characteristics,and operational parameter.A novel CCUS-EOR synergistic method was proposed to optimize the lifecycle performance of dual objective of EOR and storage.Furthermore,based on multi-objective optimization,considering the lifecycle,a multi-scale techno-economic evaluation method was proposed to fully assess the CCUS-EOR project per-formance.Finally,a set of recommendations for advancing CCUS-EOR technologies by deploying multi-factor/multi-field coupling methodologies,novel green intelligent injection materials,and artificial intel-ligence/machine learning technologies were visited.
基金supported by the National Natural Science Foundation of China(No.52204065,No.52374063)the Independent Innovation Research Project of China University of Petroleum(No.24CX06017A)Shandong Provincial Natural Science Foundation,China(No.ZR2024QE075,No.ZR2023ME049)。
文摘The sandy conglomerate reservoir is tight and exhibits strong heterogeneity,rendering conventional water flooding and gas drive methods inefficient and challenging for the effective development.CO_(2) water alternating gas(CO_(2)-WAG)injection as an effective enhanced oil recovery(EOR)method has been applied in heterogeneous reservoirs.Simultaneously,it facilitates carbon sequestration,contributing to the green and low-carbon transformation of energy.However,the EOR mechanisms and influencing factors are still unclear for the development of heterogeneous sandy conglomerate reservoirs.In this paper,we conducted core flooding experiments combined nuclear magnetic resonance(NMR)technology to investigate EOR mechanisms of the CO_(2)-WAG injection on the multiscale(reservoir,layer,and pore).The study compared multiscale oil recovery in sandy conglomerate reservoirs under both miscible and immiscible conditions,while also analyzing the effects of water-gas ratio and injection rate.In the immiscible state,the CO_(2)-WAG displacement achieves an oil recovery of approximately 22.95%,representing a 7.82%increase compared to CO_(2) flooding.This method effectively inhibits CO_(2) breakthrough in high-permeability layers while enhancing the oil recovery in medium-and low-permeability layers.Furthermore,CO_(2)-WAG displacement improves the microscopic oil displacement efficiency within mesopores and micropores.As the water-gas ratio increases,the total oil recovery rises,with enhanced oil recovery in low-permeability layers and micropores.Moreover,a gradual increase in injection rate leads to a decrease in total oil recovery,but it leads to an increase in oil recovery from low-permeability sandy conglomerate layers and micropores.In the miscible state,the displacement efficiency of CO_(2)-WAG is significantly enhanced,the total oil recovery three times higher than that in the immiscible state.In particular,the oil recovery from low permeability layers and micropores has further improved.Additionally,experimental results indicate that parameters such as water-gas ratio and injection rate do not significantly affect the oil recovery of CO_(2)-WAG miscible displacement.Therefore,maintaining the reservoir pressure above the minimum miscible pressure is the key to maximizing ultimate recovery factor in these reservoirs.
文摘Carbon dioxide-enhanced oil recovery(CO_(2)-EOR)and storage is recognized as an economically feasible technique if used in suitable reservoirs.The type or form and capacity of this CO_(2) sequestration technique is synergistically affected by heat,flow,stress,and chemical reactions.Aimed at addressing the technological issues in applying CO_(2)-EOR and storage in a high water-cut reservoir in Xinjiang,China,this paper proposes a thermo-hydro-mechanical-chemical coupling method during CO_(2) flooding.The potential of CO_(2) sequestration and EOR in the target reservoir is discussed in combination with the surrogate optimization method.This method works better as it considers the evolution of structural trapping,capillary trapping,solubility trapping,and mineral trapping during CO_(2) injection as well as the influence the physical field has on the sequestration capacity for different forms of CO_(2) sequestration.The main mechanisms of CO_(2) sequestration in the high water-cut reservoir is structural trapping,followed by capillary trapping.Solubility trapping and mineral trapping have less contribution to the total sequestration capacity of CO_(2).After optimization,the cumulative oil production was 2.36×10^(6)m^(3),an increase of 0.25×10^(6)m3or 11.9%compared to the pre-optimization value.The CO_(2) sequestration capacity after optimization was 1.39×10^(6)t,which is an increase of 0.23×10^(6)t compared to values obtained before optimization;this effectively increases the area affected by CO_(2) by 24.4%.Of the four trapping mechanisms,capillary trapping and structural trapping showed a high increase of 32.5%and17.28%,respectively,while solubility trapping and mineral trapping only led to an increase of 5.1%and0.43%,respectively.This research could provide theoretical support for fully utilizing the potential of CO_(2)-EOR and sequestration technology.
文摘This study documents pioneering results in marginal wells in Texas,where the application of RDV-00■restored production through delayed protonic activation catalyzed by reservoir energy.The product,based on RDV■(Vasoactive Dynamic Reactor)technology,operates via:Controlled protonation of molecular structures;Release of energetic carbocations;Autonomous transformation without external inputs.(a)Case 1(Well#E2-Starr County):Certified as“dry”by RRC(2022)after 48 months at 0 BPD;8 months post-injection of 5 gal RDV-00■(Fluid column:37 bbl;Wellhead pressure:80 psi(vs.0 psi initially)).(b)Case 2(Well#P1-Luling Field):Historical stripper well(0.25-0.5 BPD);23 months of immobilization with 15 gal RDV-00■;Critical results:(1)Initial production:42 BPD(8,400%above baseline);(2)Shut-in wellhead pressure:40 psi(neighboring wells=0-3 psi);(3)Current behavior:Continuous recharge from reservoir(well shut-in due to lack of storage).(c)Technically Significant Observations:(1)First case of self-sustaining reactivation in depleted wells;(2)Mechanism validated by Autonomous pressure generation(0→40-80 psi),and Continuous flow without additional stimulation;(3)No documented precedents in SPE/OnePetro literature to our knowledge.
