岩性油气藏 ›› 2021, Vol. 33 ›› Issue (1): 121–130.doi: 10.12108/yxyqc.20210112

• 油气地质 • 上一篇    下一篇

鄂尔多斯盆地东北缘神府区块上古生界致密砂岩成藏特征

高计县1, 孙文举1, 吴鹏1, 段长江2   

  1. 1. 中联煤层气有限责任公司, 北京 100016;
    2. 中海油能源发展股份有限公司工程技术分公司, 天津 300457
  • 收稿日期:2020-08-06 修回日期:2020-09-16 出版日期:2021-02-01 发布日期:2021-01-25
  • 作者简介:高计县(1984-),男,博士,高级工程师,主要从事非常规油气勘探开发方面的研究工作。地址:(100016)北京市朝阳区酒仙桥路乙21号。Email:gaojx8@cnooc.com.cn。
  • 基金资助:
    国家科技重大专项“临兴—神府地区煤系地层煤层气、致密气、页岩气合采示范工程”（编号：2016ZX05066）和中海石油（中国）有限公司重点科技项目“鄂尔多斯盆地东缘致密气成藏机理与控制因素分析”（编号：CNOOC-KJ135ZDXMLTD14）联合资助

Accumulation characteristics of Upper Paleozoic tight sandstone in Shenfu block,northeastern margin of Ordos Basin

GAO Jixian1, SUN Wenju1, WU Peng1, DUAN Changjiang2   

  1. 1. China United Coalbed Methane Corp. Ltd., Beijing 100016, China;
    2. Engineering Technology Branch, CNOOC Energy Development Co., Ltd., Tianjin 300457, China
  • Received:2020-08-06 Revised:2020-09-16 Online:2021-02-01 Published:2021-01-25

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摘要： 为进一步拓展鄂尔多斯盆地东缘致密气勘探前景，在区域烃源岩、储层、盖层和运移输导体系分析基础上，结合流体包裹体测试，开展了神府区块石炭系—二叠系（C—P）致密气成藏条件研究。结果表明：主力煤层厚度较大且分布稳定，较大的生烃强度构成成藏的基本条件；储层整体呈现低孔低渗特征，以残余粒间孔和粒内溶孔为主要储集空间；C—P内部广泛发育的泥岩具备良好的封盖能力；流体包裹体均一温度指示1期持续性成藏；可划分出源内、近源和远源等3种储盖组合模式。不同层位源储配置的差异控制着不同成藏模式的形成。该研究成果进一步拓展了鄂尔多斯盆地油气勘探开发前景，为研究区及类似致密气田勘探提供了理论基础。

关键词: 致密砂岩, 成藏规律, 主控因素, 上古生界, 鄂尔多斯盆地东北缘

Abstract: In order to further expand the exploration degree of tight gas in the eastern margin of Ordos Basin, based on the analysis of regional source rock,reservoir,caprock and hydrocarbon transport system,combined with fluid inclusion test,the tight gas accumulation conditions of Carboniferous-Permian in Shenfu block were studied. The results show that the main coal seams are thick and stable,and the better hydrocarbon generation intensity constitutes the basic conditions for accumulation. The reservoir is characterized by low porosity and low permeability, with residual intergranular pores and intragranular dissolved pores as the main reservoir space. The mudstone widely developed in Carboniferous-Permian has good sealing capacity. The homogenization temperature of fluid inclusions indicates the first stage of continuous reservoir formation,and three reservoir-cap assemblage models,namely,within source,near source and far source,can be divided. The difference of source reser-voir configuration in different layers controls the formation of different accumulation models. The related achievements and understanding further expand the prospect of petroleum exploration and development in Ordos Basin,and provide a theoretical basis for oil and gas exploration in the study area and similar tight gas fields.

Key words: tight sandstone reservoir, accumulation law, controlling factor, Upper Paleozoic, northeastern margin of Ordos Basin

中图分类号: 

  • TE122.3+1
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