Analysis of geological background and development situation of typical oil/gas-bearing shales in China and America
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    Abstract:

    In order to gain a further understanding of shale gas/oil resource,and to learn from successful overseas development experience,the geological characteristics of shale in Ohio,Marcellus,Barnett,Wolfcamp in North America and the shale in Longmaxi and Shahejie in China were compared in detail. The similarities and differences of typical shales in organic geochemistry and reservoir characteristics in both China and America were deeply clarified,at the same time,the development trends of oil and gas resources in China and the United States were also presented,and the referential values were given. The results show that the oil/gas-bearing shales developed successfully are characterized by simple structure,thick layer,small thickness change,moderate TOC content and organic maturity,rich typeⅡkerogen,rich brittle mineral content and overpressure. North American shale oil developers use large amount of fracturing fluid,large amount of sand, short fracture cluster distance and stage distance to improve the fracturing technique,and use multi-well pad mode to reduce the land occupancy area,and apply the“chain”fracturing to reduce the overall engineering time. By using the big data to analyses the influence weight of different production parameters on oil or gas output,the production increases with the well configured parameters. The development experiences of shale oil or gas that China can learn from U.S. include combining transport pipelines,introducing private capital,and rewarding innovation.

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ZHANG Aobo, TANG Dazhen, TAO Shu, XU Hao, WANG Haihua, ZHUANG Yongtao. Analysis of geological background and development situation of typical oil/gas-bearing shales in China and America[J]. Petroleum Geology and Recovery Efficiency,2019,26(1):37~45

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  • Received:
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  • Online: April 02,2019
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