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Application of integrated formation evaluation and three-dimensional modeling in shale gas prospect identification

Journal of Geological Research 2019年第3期1卷 28-39页

作者： Jin Gao Zhe Cao Guangdi Liu Longmei Zhao Lijun Du Yuhua Kong College of Geosciences China University of PetroleumBeijing102249China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China China United Coalbed Methane National Engineering Research Center Corporation Limited Beijing100095China Fuyu Oil Production Plant in Jilin Oilfield Company PetroChinaSongyuan138000China PetroChina Xinjiang Oilfield Company Karamay834000China

Identifying the shale gas prospect is crucial for gas extraction from such *** Basin(in Northwest China)is widely considered to have high potential as a shale gas resource,and the Jurassic,the most significant gas source strata,is considered as prospective for shale gas exploration and *** study evaluated the Lower Jurassic badaowan formation shale gas potential combined with geochemical,geological,and well logging data,and built a three-dimensional(3D)model to exhibit favorable shale gas *** addition,methane sorption capacity was tested for verifying the *** badaowan shale had an average total organic carbon(TOC)content of 1.30 wt.%and vitrinite reflectance(Ro)ranging from 0.47%to 0.81%with dominated type III organic matter(OM).X-ray diffraction(XRD)analyses showed that mineral composition of badaowan shale was fairly homogeneous and dominated by clay and brittle minerals.67 wells were used to identify prospective shale intervals and to delineate the area of ***,three badaowan shale gas prospects in the Junggar Basin were identified:the northwestern margin prospect,eastern Central Depression prospect and Wulungu Depression *** middle interval of the northwestern margin prospect was considered to be the most favorable exploration target benefitted by wide distribution and high lateral ***,methane sorption capacity of the badaowan shale was comparable to that of the typical gas shales with similar TOC content,showing a feasible gas potential.

关键词： Shale gas Prospect Prospective interval badaowan formation Junggar Basin

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