天然气地球科学

• 天然气勘探 • 上一篇    下一篇

利用高密度电阻率法预测第四系浅层生物气——以江苏省南通地区为例

滕龙,殷启春,方朝刚,郑红军,沈雪华,朱红兵,陈基炜   

  1. 1.中国科学技术大学地球和空间科学学院,安徽 合肥 230026;
    2.中国地质调查局南京地质调查中心,江苏 南京 210016
  • 收稿日期:2017-10-18 修回日期:2018-03-29 出版日期:2018-05-10 发布日期:2018-05-10
  • 作者简介:滕龙(1980-),男,贵州铜仁人,高级工程师,博士,主要从事非常规地球物理方法研究.E-mail:42105150@qq.com.
  • 基金资助:

    中国地质调查局调查工作项目(编号:DD20160180;资[2014]03-029-005)联合资助.

The feasibilities to explore biogenic gas in the quaternary stratawith electrical resistivity imaging:A case study of Nantong area of Jiangsu Province,China

Teng Long,Yin Qi-chun,Fang Chao-gang,Zheng Hong-jun,Shen Xue-hua,Zhu Hong-bing,Chen Ji-wei   

  1. 1.School of Earth and Space Science,University of Science and Technology of China,Hefei 230026,China;
    2.Nanjing Center,China Geological Survey,Nanjing 210016,China
  • Received:2017-10-18 Revised:2018-03-29 Online:2018-05-10 Published:2018-05-10

摘要:

采用高密度电阻率法以改善浅层生物气的地球物理勘探效率,并以江苏省南通市海门—启东地区浅层生物气的探测结果为例,论述了高密度电阻率法在第四系岩性和层序结构划分、储层识别和气层预测等方面为应用。结果表明:以实测岩土物性为基础,利用高密度电阻率法的二维反演视电阻率断面图,结合已知钻孔和静力触探信息可以较为详细地划分出南通地区第四系内150m以浅的地层结构。同时可以利用地层的电性特征识别研究区第四系浅层生物气储层并预测含气层:当砂体含气时,表现为高阻;当砂体无气而充水时,则为低阻。

关键词: 高密度电阻率, 第四系, 生物气, 南通

Abstract:

Electrical resistivity imaging (ERI) is an effective tool to prospect biogenic gas in shallow layer.In this paper,we illustrate the applications of ERI to compartmentalize lithologies and recognize the Quaternary strata structure,distinguish reservoirs and biogenic gas layers based on the surveying results obtained in Nantong area.The research indicates that the resistivity section with ERI in Nantong area can perfectly recognize the Quaternary strata structure on the basis of physical properties of rock.The clay and sand can be continuously recognized for the flat sedimentary interface in the Quaternary.The resistivity is high when the biogenic gas bears sand and vice versa.The reservoirs and biogenic gas layers can be distinguished using this feature.

Key words: Electrical resistivity imaging, Quaternary, Biogenic gas, Nantong area

中图分类号: 

  • TE132

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