accumulation conditions and exploration potential of wufeng-longmaxi formations shale gas in wuxi area, northeastern sichuan basin, china

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ID: 215717
2017
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Abstract
Wufeng-Longmaxi Formations shale gas is a new exploration field in Wuxi area, Sichuan Basin, China. Some geological parameters related to shale gas evaluation of the new exploration wells in Wuxi area have been studied, including shale reservoir, gas-bearing, geochemical and paleontological characteristics. The study suggests that the original shale gas generation conditions of the area were good, but later this area went through serious and multi-phase tectonic damage. The major evidences include that: the δ13C2 value of shale gas is obviously higher than that in areas with the same maturity, indicating the shale gas is mainly late kerogen cracking gas and high hydrocarbon expulsion efficiency; the porosity of shale in Wuxi area is very low because of strong tectonic movements and lack of retained oil in the shale; some shale cores near faults even show very weak metamorphic characteristics with intense cleavage, and the epidermis of graptolite fossils was pyrolyzed. The comprehensive study shows shale gas in Wuxi area has prospective resources, but the possibility to get scale commercial production in recent time is very low.
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Authors ;Wei Wu;Xuewen Shi;Jia Liu;Du Li;Jun Xie;Shengxian Zhao;Chunhai Ji;Ying Hu;Yanbo Guo
Journal future internet
Year 2017
DOI
10.1016/j.jnggs.2017.12.004
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