A New Insight into Shale-Gas Accumulation Conditions and Favorable Areas of the Xinkailing Formation in the Wuning Area, North-West Jiangxi, China

Shangru Li, Li Zeng, Zhongpeng Wang, Jinchuan Zhang and Dong Ma
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Shangru Li: Jiangxi Geo-Engineering (Group) Corporation, Nanchang 330001, China
Li Zeng: Jiangxi Geo-Engineering (Group) Corporation, Nanchang 330001, China
Zhongpeng Wang: Jiangxi Geo-Engineering (Group) Corporation, Nanchang 330001, China
Jinchuan Zhang: School of Energy Resources, China University of Geosciences, Beijing 100089, China
Dong Ma: School of Petroleum Engineering, Yangtze Univeristy, Wuhan 430100, China

Energies, 2017, vol. 11, issue 1, 1-17

Abstract: In north-west Jiangxi, China, most shale-gas exploration has been focused on the Lower Cambrian Hetang and Guanyintang formations, whereas the Upper Ordovician Xinkailing formation shale has been ignored for years due to heavy weathering. This study systematically analyzed gas source conditions, reservoir conditions and gas-bearing ability in order to reveal the shale-gas accumulation conditions of the Xinkailing formation. The results show that the Xinkailing formation is characterized by thick deposition of black shale (10–80 m), high organic content (with total organic carbon between 1.18% and 3.11%, on average greater than 2%), relatively moderate thermal evolution (with vitrinite reflectance between 2.83% and 3.21%), high brittle-mineral content (greater than 40%), abundant nanopores and micro-fractures, very good adsorption ability (adsorption content between 2.12 m 3 /t and 3.47 m 3 /t, on average about 2.50 m 3 /t), and strong sealing ability in the underlying and overlying layers, all of which favor the generation and accumulation of shale gas. The Wuning-Lixi and Jinkou-Zhelin areas of the Xinkailing formation were selected as the most realistic and favorable targets for shale-gas exploration and exploitation. In conclusion, the Wuning area has great potential and can provide a breakthrough in shale gas with further investigation.

Keywords: north-west Jiangxi; Wuning area; Xinkailing formation shale; gas-generating conditions; reservoir conditions; gas-bearing potential; favorable area (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
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