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Geologic structure controls on initial productions of lower Silurian Longmaxi shale in south China

文献类型：期刊论文

作者Feng, Weiping1,2; Wang, Feiyu1,2; Guan, Jing2; Zhoe, Jianxun1,2; Wei, Fubin3; Dong, Wenjie4; Xu, Yafei2
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2018-03-01
卷号91页码:163-178
关键词Shale gas Longmaxi formation Free gas Total porosity Gas saturation
ISSN号0264-8172
DOI10.1016/j.marpetgeo.2018.01.001
文献子类Article
英文摘要The Lower Silurian Longmaxi shale is the most important marine shale gas play in South China. Several hundred wells have been drilled to date, of which more than 150 wells have obtained high initial production (IP). Outside of the Sichuan Basin, however, wells drilled in the Lower Silurian Longmaxi shale do not reach flow rates that are commercial. Developing an understanding of the key factors controlling the IPs of Longmaxi shale is important in screening shale-resource plays. In this study, the TOC, thermal maturity, porosity, and gas saturation data obtained from Longmaxi shale of southeastern Chongqing area outside Sichuan Basin have been compared with that of Sichuan Basin. The results of this study show that the shales encountered display similar properties including TOC (> 2%), thermal maturity (2.5-3.5% EqRo), and total porosity (3-6%). A good correlation between IPs and pressure coefficient suggest that the free gas content of gas shale controls on IPs. Porosity and gas saturation of gas shale are the main factors to control its free gas volume. The gas saturations in Longmaxi shale from high initial production wells in Sichuan Basin mainly range between 50 and 90%, however, that of shale in the southeastern Chongqing area are decreased to 10-30%. This is the directly reason for low IPs of wells. The contrasting gas saturation of Longmaxi shale between Sichuan Basin and the adjacent fold-thrust belts are interpreted to reflect, in part, differences in sealed condition of fluid system. Intensive tectonic movements caused the exhumation, faulting and fracturing, that reduced or destroyed the sealed ability of shale fluid system, which are the major factors for enhancing water saturation, decreasing fluid pressure and IPs. Finally, the study proposes several most favorable zones for Longmaxi shale gas exploration and development.
WOS关键词EASTERN SICHUAN BASIN ; GAS SYSTEMS ; BARNETT SHALE ; MARINE SHALE ; EVOLUTION ; BLOCK ; THERMOCHRONOLOGY ; EXPLORATION ; ADSORPTION ; RESERVOIRS
WOS研究方向Geology
语种英语
WOS记录号WOS:000430886900011
出版者ELSEVIER SCI LTD
资助机构National key Basic Research Program of China (973 Program)(2012CB214705) ; National key Basic Research Program of China (973 Program)(2012CB214705) ; National Science and Technology Major Project(2016ZX05007001) ; National Science and Technology Major Project(2016ZX05007001) ; National key Basic Research Program of China (973 Program)(2012CB214705) ; National key Basic Research Program of China (973 Program)(2012CB214705) ; National Science and Technology Major Project(2016ZX05007001) ; National Science and Technology Major Project(2016ZX05007001) ; National key Basic Research Program of China (973 Program)(2012CB214705) ; National key Basic Research Program of China (973 Program)(2012CB214705) ; National Science and Technology Major Project(2016ZX05007001) ; National Science and Technology Major Project(2016ZX05007001) ; National key Basic Research Program of China (973 Program)(2012CB214705) ; National key Basic Research Program of China (973 Program)(2012CB214705) ; National Science and Technology Major Project(2016ZX05007001) ; National Science and Technology Major Project(2016ZX05007001)
源URL[http://ir.iggcas.ac.cn/handle/132A11/88296]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Wang, Feiyu
作者单位1.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China
2.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China
3.Explorat Co, Chengdu 610041, Sichuan, Peoples R China
4.Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Feng, Weiping,Wang, Feiyu,Guan, Jing,et al. Geologic structure controls on initial productions of lower Silurian Longmaxi shale in south China[J]. MARINE AND PETROLEUM GEOLOGY,2018,91:163-178.
APA Feng, Weiping.,Wang, Feiyu.,Guan, Jing.,Zhoe, Jianxun.,Wei, Fubin.,...&Xu, Yafei.(2018).Geologic structure controls on initial productions of lower Silurian Longmaxi shale in south China.MARINE AND PETROLEUM GEOLOGY,91,163-178.
MLA Feng, Weiping,et al."Geologic structure controls on initial productions of lower Silurian Longmaxi shale in south China".MARINE AND PETROLEUM GEOLOGY 91(2018):163-178.

入库方式： OAI收割

来源：地质与地球物理研究所

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