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Geological characteristics and development potential of transitional shale gas in the east margin of the Ordos Basin,NW China

引用

Petroleum Exploration and Development 2020年第3期47卷 471-482页

作者： KUANG Lichun DONG Dazhong HE Wenyuan WEN Shengming SUN Shasha LI Shuxin QIU Zhen LIAO Xinwei LI Yong WU Jin ZHANG Leifu SHI Zhensheng GUO Wen ZHANG Surong Science and Technology Management Department of China National Petroleum Corporation Beijing 100007China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China China Petroleum Consulting Center Beijing 100724China PetroChina Coalbed Methane Company Limited Beijing 100028China China University of Petroleum Beijing 102249China China University of Mining and Technology Beijing 100083China

The shales in the 2nd Member of shanxi formation in the east margin of the Ordos Basin were deposited in a marine-nonmarine transitional environment during the *** on the recent breakthroughs in the shale gas exploration and theoretical understandings on the shale gas of the study area,with a comparison to marine shale gas in the Sichuan Basin and marine-nonmarine transitional shale gas in the U.S.,this study presents the geological characteristics and development potential of marine-nonmarine transitional gas in the study *** geological features are identified in the 2nd Member of the shanxi formation in the study area has:(1)stable sedimentary environment is conductive to deposition of widely distributed organic shale;(2)well-developed micro-and nanoscale pore and fracture systems,providing good storage capacity;(3)high content of brittle minerals such as quartz,leading to effectively reservoir fracturing;and(4)moderate reservoir pressure and relatively high gas content,allowing efficient development of shale *** 2nd Member of shanxi formation in the east margin of Ordos Basin is rich in shale gas *** favorable zones,Yulin-Linxian,Shiloubei-Daning-Jixian,and Hancheng-Huangling are developed,with a total area of 1.28×104 km2 and resources between 1.8×1012 and 2.9×1012m3,indicating a huge exploration *** of the 2nd Member of shanxi formation in vertical wells show that the favorable intervals have stable gas production and high reserves controlled by single well,good recoverability and *** shale interval has sufficient energy,stable production capacity,and good development prospects,as evidenced by systematic well *** east margin of the Ordos Basin has several shale intervals in the shanxi and Taiyuan formations,and several coal seams interbedded,so collaborative production of different types of natural gas in different intervals can be *** study results can provide reference for shale gas ex

关键词： shale gas marine-nonmarine transitional shale favorable area collaborative production permian shanxi formation Ordos Basin

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