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天然气地球科学

• 非常规天然气 • 上一篇    

渝东南地区龙马溪组页岩吸附特征及其影响因素

毕赫，姜振学，李鹏，程礼军，曾春林，许野，张莺莺   

  1. 1.中国石油大学(北京)油气资源与探测国家重点实验室，北京 102249；
    2.中国石油大学(北京)非常规天然气研究院，北京  102249；
    3.重庆地质矿产研究院页岩气所，四川 重庆 400042
  • 收稿日期:2013-07-26 修回日期:2013-08-29 出版日期:2014-02-10 发布日期:2014-02-10
  • 通讯作者: 毕赫bihecup@163.com. E-mail:bihecup@163.com.
  • 作者简介:毕赫(1989-)，女，黑龙江大庆人，硕士，主要从事非常规油气藏形成与分布、盆地分析与油气资源评价研究. E-mail：bihecup@163.com.
  • 基金资助:

    国家科技重大专项课题(编号：2011ZX05018-002)；重庆市国土资源和房屋管理局科技计划重大项目(编号：CQGT-KJ-2012)联合资助.

Adsorption Characteristic and Influence Factors of Longmaxi Shale in Southeastern Chongqing

BI He，JIANG Zhen-xue，LI Peng，CHENG Li-jun，ZENG Chun-lin，XU Ye，ZHANG Ying-ying   

  1. 1.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,
    Beijing 102249,China;2.Unconventional National Gas Institute,China University of Petroleum,
    Beijing 102249,China;3.Chongqing Institute of Geology and Mineral Resources,Chongqing 400042,China
  • Received:2013-07-26 Revised:2013-08-29 Online:2014-02-10 Published:2014-02-10

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摘要：

页岩的吸附气含量是页岩气量的主要组成部分，不同地区页岩具有不同的吸附特征，其影响因素也有较大差异，因此进一步研究页岩吸附气量，对预测页岩含气量、进行资源评价具有重要意义。渝东南地区发育了较好的下志留统龙马溪组富有机质页岩，具有成熟度高、埋深浅及分布广等特点，为了研究该套页岩的吸附能力和影响因素，选取了该地区2口页岩气井的岩心进行有机碳含量测定、热成熟度测定、X-衍射岩矿分析、氮气吸附实验、扫描电镜实验以及等温吸附实验等一系列分析测试，进一步分析了页岩吸附能力与孔隙结构、有机碳含量、矿物成分、含水率和压力的影响关系，研究过程中发现，该套页岩中有机质丰度高低是影响页岩吸附气量的关键因素，而有机质中发育的大量孔隙，其丰富的比表面积是增强页岩吸附能力的根本因素。

关键词: 渝东南, 龙马溪组页岩, 吸附特征, 影响因素, 比表面积

Abstract:

Adsorption gas in shale is the main component of shale gas.With different adsorption characteristics,shale in different areas has diverse influence factors.Therefore,it is significant to carry out further study on adsorption gas of shale for forecasting the shale gas content and evaluating the shale gas resource.Longmaxi  shale rich in organic matter develops greatly well in southeastern Chongqing.It is characterized by high maturity,shallow burial depth and wide distribution.In order to study the adsorption capacity and influencing factors of shale,shale cores from two wells are selected to do the organic carbon content,thermal maturity,X diffraction rock analysis,nitrogen gas adsorption experiment,scanning electron microscopy and isothermal adsorption experiments.Through the data,the relationship between adsorption capacity and pore structure,TOC,mineral composition,moisture content or pressure is figured out.Based on the results,the organic matter content is the key factor in affecting the adsorption capacity and the specific surface area is the fundamental factor to enhance the capacity.

Key words: Southeastern Chongqing, Longmaxi shale, Adsorption characteristic, Influence factors, Specific surface area

中图分类号: 

  • TE122.2

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