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Evaluation of gas production from multiple coal seams: A simulation study and economics 被引量:1
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作者 Yanting Wu Zhejun Pan +2 位作者 Dingyu Zhang zhaohui lu luke D. Connell 《International Journal of Mining Science and Technology》 EI CSCD 2018年第3期359-371,共13页
Gas production from multiple coal seams has become common practice in many coal basins around the world. Although gas production rates are typically enhanced, the economic viability of such practice is not well studie... Gas production from multiple coal seams has become common practice in many coal basins around the world. Although gas production rates are typically enhanced, the economic viability of such practice is not well studied. In order to investigate the technical and economic feasibility of multiple coal seams production, reservoir simulation integrated with economics modelling was performed to study the effect of important reservoir properties of the secondary coal seam on production and economic performance using both vertical and horizontal wells. The results demonstrated that multiple seam gas production of using both vertical and horizontal wells have competitive advantage over single layer production under most scenarios. Gas content and permeability of the secondary coal seam are the most important reservoir properties that have impact on the economic feasibility of multiple seam gas production. The comparison of vertical well and horizontal well performance showed that horizontal well is more economically attractive for both single well and gas field. Moreover, wellhead price is the most sensitive to the economic performance, followed by operating costs and government subsidy. Although the results of reservoir simulation combined with economic analysis are subject to assumptions, multiple seam gas production is more likely to maintain profitability compared with single layer production. 展开更多
关键词 经济性能 生产率 煤气 多重 模拟 气体生产 评估 经济可行性
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Low-field NMR application in the characterization of CO_(2)geological storage and utilization related to shale gas reservoirs:a brief review
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作者 zhaohui lu Ke LI +2 位作者 Xingbing LIU Peng ZHAO Jun LIU 《Frontiers of Earth Science》 SCIE CSCD 2023年第3期739-751,共13页
CO_(2)geological storage and utilization(CGSU)is considered a far-reaching technique to meet the demand of increasing energy supply and decreasing CO_(2)emissions.For CGSUs related to shale gas reservoirs,experimental... CO_(2)geological storage and utilization(CGSU)is considered a far-reaching technique to meet the demand of increasing energy supply and decreasing CO_(2)emissions.For CGSUs related to shale gas reservoirs,experimental investigations have attracted variable methodologies,among which low-field NMR(LF-NMR)is a promising method and is playing an increasingly key role in reservoir characterization.Herein,the application of this nondestructive,sensitive,and quick LF-NMR technique in characterizing CGSU behavior in shale gas reservoirs is reviewed.First,the basic principle of LF-NMR for 1H-fluid detection is introduced,which is the theoretical foundation of the reviewed achievements in this paper.Then,the reviewed works are related to the LF-NMR-based measurements of CH_(4)adsorption capacity and the CO_(2)-CH_(4)interaction in shale,as well as the performance on CO_(2)sequestration and simultaneous enhanced gas recovery from shale.Basically,the reviewed achievements have exhibited a large potential for LF-NMR application in CGSUs related to shale gas reservoirs,although some limitations and deficiencies still need to be improved.Accordingly,some suggestions are proposed for a more responsible development of the LF-NMR technique.Hopefully,this review is helpful in promoting the expanding application of the LF-NMR technique in CGSU implementation in shale gas reservoirs. 展开更多
关键词 CO_(2)/CH_(4)competitive adsorption shale gas reservoir CO_(2)geological storage gas recovery enhancement low-field NMR
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Brief overview and perspective on Advances in CO_(2)Geological Storage and Utilization(CGSU)
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作者 Jun LIU Yanbin YAO +2 位作者 Peng ZHAO zhaohui lu Yunzhong JIA 《Frontiers of Earth Science》 SCIE CSCD 2023年第3期643-645,共3页
1 Introduction All over the world,with the intense longing for carbon emission reduction and the demand for clean energy(Feng et al.,2020;Iddphonce et al.,2020;Zhao et al.,2022),a promising and far-reaching technology... 1 Introduction All over the world,with the intense longing for carbon emission reduction and the demand for clean energy(Feng et al.,2020;Iddphonce et al.,2020;Zhao et al.,2022),a promising and far-reaching technology called CO_(2) geological storage and utilization(CGSU)has attracted increasing attention(Iddphonce et al.,2020;Ma et al.,2020).This CGSU technique enjoys huge potential and broad prospect,because it usually enables dual rewarding consequences–to sequester CO_(2) and to acquire energy from geological formations,such as geothermal rock,oil and gas reservoirs(Iddphonce et al.,2020;Klewiah et al.,2020;Liu et al.,2020).In fact,the CGSU has been followed by interest of scientists all around world since geological storage was first proposed in the 1970s as a way to dispose of the CO_(2).Meanwhile,the CGSU technique is not mature enough and usually involves a complicated THMC coupled process,making it necessary to deploy more insightful investigations to boost the development of CGUS technique in a robust,safe and cost-effective manner(Liu et al.,2021b;Zhao et al.,2021;Liu et al.,2023).Basically,this theme is expected to enhance the knowledge about the crucial role of CGSU in achieving the carbon emission reduction–an issue concerned to the world(Liu et al.,2021a;Xie et al.,2021;Zhao et al.,2021;Zhao et al.,2022).Therefore,this special issue is organized and tends to present newest achievements regarding the CGSU,such as the theory expansion,economic analysis,experimental investigation and numerical simulation. 展开更多
关键词 formations RESERVOIRS ROCK
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能量应激介导的铁死亡在肿瘤中的研究进展
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作者 马恒 莫胜崴 +4 位作者 张越 陈先龙 于双妮 卢朝辉 陈杰 《中华病理学杂志》 CAS CSCD 北大核心 2022年第6期576-580,共5页
铁死亡是一种铁离子依赖的非凋亡的新的细胞死亡形式, 主要表现为外源性或内源性氧化还原失衡导致的细胞膜脂质过氧化。肿瘤细胞的存活依赖于能量物质的供给, 营养物质剥夺会诱发能量应激介导的代谢紊乱, 进而触发铁死亡。本文从营养物... 铁死亡是一种铁离子依赖的非凋亡的新的细胞死亡形式, 主要表现为外源性或内源性氧化还原失衡导致的细胞膜脂质过氧化。肿瘤细胞的存活依赖于能量物质的供给, 营养物质剥夺会诱发能量应激介导的代谢紊乱, 进而触发铁死亡。本文从营养物质剥夺、营养转运体抑制和内源性铁死亡防御系统3个方面在肿瘤铁死亡中的研究进展作一综述, 为靶向能量代谢途径诱导肿瘤铁死亡提供理论基础。 展开更多
关键词 能量物质 铁死亡 防御系统 氧化还原 能量代谢 应激 代谢紊乱 转运体
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Reversible adhesion surface coating proppant 被引量:3
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作者 Quan Xu Fan Fan +5 位作者 zhaohui lu Mao Sheng Shouceng Tian Ye Zhang Linhua Pan Yang Zhou 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第1期553-556,共4页
Proppant is a key material in the hydraulic fracturing process,which has been widely used in unconventional oil exploitation.Normal proppants are easy to sedimentate and accumulate at the entrance of shale fracture,wh... Proppant is a key material in the hydraulic fracturing process,which has been widely used in unconventional oil exploitation.Normal proppants are easy to sedimentate and accumulate at the entrance of shale fracture,which will block the diversion of water,oil and gas.Coated proppants(CPs) are fabricated by coating resin on normal ceramic proppants through a simple method,which is dramatically enhanced the supporting properties in shale fracture and easy to scale up.Compared with uncoated ceramic proppants,the self-suspension ability of CPs is ~11 times higher,which are able to migrate and distribute farther and deeper inside the fracture.At the same time,Coating enhanced the 23.7% of adhesive force in maximum,which makes the CPs easier to adhere on the fracture surface to supportthe shale fracture.Besides,the liquid conductivity of CPs is 60% higher than uncoated ceramic proppants at13.6 MPa pressure.This method is expected to fabricated varieties of proppantsfor shale fracture supporting to improve the exploration of unconventional oil and gas resources. 展开更多
关键词 Self-suspension COATING Proppants Hydraulic fracturing process Liquid conductivity
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Numerical modeling of the dynamic variation in multiphase CH_(4) during CO_(2) enhanced gas recovery from depleted shale reservoirs 被引量:1
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作者 Lijun CHENG Ye ZHANG +3 位作者 Jun LIU zhaohui lu Chunlin ZENG Peng ZHAO 《Frontiers of Earth Science》 SCIE CSCD 2021年第4期790-802,共13页
Regarding CO_(2)enhanced shale gas recovery,this work focuses on changes in the multiphase(free/adsorbed)CH_(4)in the process of CO_(2)enhanced shale gas recovery,by utilizing a rigorous numerical model with real geol... Regarding CO_(2)enhanced shale gas recovery,this work focuses on changes in the multiphase(free/adsorbed)CH_(4)in the process of CO_(2)enhanced shale gas recovery,by utilizing a rigorous numerical model with real geological parameters.This work studies nine injection well(IW)and CH_(4)production well(PW)combinations of CO_(2)to determine the influence of IW and PW locations on the dynamic interaction of multiphase CH_(4)during 10000 d of CO_(2)injection.The results indicate that the content of both the adsorbed CH_(4)and free CH_(4)is strongly variable before(and during)the CO_(2)-CH_(4)displacement.In addition,during the simulation process,the proportion of the adsorbed CH_(4)among all extracted CH_(4)phases dynamically increases first and then tends to stabilize at 70%-80%.Moreover,the IW-PWs combinations signifi-cantly affect the outcomes of CO_(2)enhanced shale gas recovery-for both the proportion of adsorbed/free CH_(4)and the recovery efficiency.A longer IW-PW distance enables more adsorbed CH_(4)to be recovered but results in a lower efficiency of shale gas recovery.Basically,a shorter IW-PWs distance helps recover CH_(4)via CO_(2)injection if the IW targets the bottom layer of the Wufeng-Longmaxi shale formation.This numerical work expands the knowl-edge of CO_(2)enhanced gas recovery from depleted shale reservoirs. 展开更多
关键词 CO_(2)-CH_(4)displacement free gas Longmaxi shale CH_(4)desorption numerical simulation
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