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

doi:10.1016/j.marpetgeo.2018.01.001

CORC > 地质与地球物理研究所 > 中国科学院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

	Geologic structure controls on initial productions of lower Silurian Longmaxi shale in south China
	Feng, Weiping 1,2; Wang, Feiyu 1,2; Guan, Jing 2; Zhoe, Jianxun 1,2; Wei, Fubin 3; Dong, Wenjie 4; Xu, Yafei 2
刊名	MARINE AND PETROLEUM GEOLOGY
	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
DOI	10.1016/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
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000430886900011
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)
内容类型	期刊论文
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.