四川盆地石柱地区自流井组页岩气成藏条件与勘探前景

doi:10.12108/yxyqc.20200104

岩性油气藏 ›› 2020, Vol. 32 ›› Issue (1): 27–35.doi: 10.12108/yxyqc.20200104

四川盆地石柱地区自流井组页岩气成藏条件与勘探前景

王登¹, 余江浩¹, 赵雪松¹, 陈威¹, 黄佳琪², 徐聪¹

1. 湖北省地质调查院, 武汉 430034;
2. 湖北省地质局第四地质大队, 湖北咸宁 437100

收稿日期:2019-07-02 修回日期:2019-09-19 出版日期:2020-01-21 发布日期:2019-11-22
通讯作者: 余江浩(1985-),男,硕士,工程师,主要从事页岩气方面的研究工作。Email:jhyu2005@126.com。 E-mail:jhyu2005@126.com
作者简介:王登(1987-),男,硕士,工程师,主要从事页岩气方面的研究工作。地址:(430034)湖北省武汉市硚口区古田五路9号。Email:w362311767@126.com
基金资助:
湖北省地勘基金项目“湖北省页岩气资源潜力评价”（编号：DKC2014-03-04）和中国地质调查局项目“中南地区页岩气资源调查评价”（编号：12120114049901）联合资助

Accumulation conditions and exploration potential of shale gas of Ziliujing Formation in Shizhu area,Sichuan Basin

WANG Deng¹, YU Jianghao¹, ZHAO Xuesong¹, CHEN Wei¹, HUANG Jiaqi², XU Cong¹

1. Hubei Geological Survey, Wuhan 430034, China;
2. No.4 Geological Team, Hubei Geological Bureau, Xianning 437100, Hubei, China

Received:2019-07-02 Revised:2019-09-19 Online:2020-01-21 Published:2019-11-22

摘要/Abstract

摘要： 为研究四川盆地石柱地区自流井组页岩气的成藏条件，开展了野外地质露头调查、岩心观察、有机地球化学分析、X射线衍射测试、物性分析和扫描电镜观察等工作。结果表明：①石柱地区自流井组东岳庙段形成于半深湖相，岩性以泥页岩为主，厚度为30～95 m。②目的层泥页岩具有“有机质丰度高、热演化程度适中”等特征，TOC质量分数多为0.49%～2.02%，R_o平均为1.27%，脆性矿物质量分数平均为58.8%。③岩石中吸附气含量较高，质量体积平均为2.78 m³/t，且埋深适中，具有良好的勘探前景。④采用叠合法预测出石柱地区桥头坝—建南—上水坝一带为页岩气勘探的有利区，通过计算可以获得研究区页岩气地质资源量约为3 905亿m³。该研究成果可为四川盆地石柱地区自流井组页岩气勘探提供借鉴。

关键词: 页岩气, 成藏地质条件, 自流井组, 石柱地区, 四川盆地

Abstract: In order to study the shale gas accumulation conditions of Ziliujing Formation in Shizhu area of Sichuan Basin,field geological outcrop survey,core observation,organic geochemical analysis,X-ray diffraction test, physical property analysis and scanning electron microscopy observation were carried out. The results show that:(1)The Dongyuemiao member of Ziliujing Formation in Shizhu area was formed in semi-deep lake facies,and the lithology was dominated by shale with a thickness of 30-95 m.(2)The mudstone of the target zone was characterized by high abundance of organic matter and moderate thermal evolution. The TOC mass fraction is 0.49%-2.02%,the R_o average is 1.27%,and the brittle mineral average is 58.8%.(3)The content of adsorbed gas in rocks is high,the average mass volume is 2.78 m³/t,and the burial depth is moderate,so it has good exploration prospects.(4)The Qiaotouba-Jiannan-Shangshuiba area in Shizhu area was predicted to be a favorable area for shale gas exploration by superimposition method,and the geological resource of shale gas was estimated to be about 390.5 billion m³. The research results can provide reference for shale gas exploration of Ziliujing Formation in Shizhu area,Sichuan Basin.

Key words: shale gas, reservoir geological condition, Ziliujing Formationr, Shizhu area, Sichuan Basin

中图分类号:

TE122.1

王登, 余江浩, 赵雪松, 陈威, 黄佳琪, 徐聪. 四川盆地石柱地区自流井组页岩气成藏条件与勘探前景[J]. 岩性油气藏, 2020, 32(1): 27–35.

WANG Deng, YU Jianghao, ZHAO Xuesong, CHEN Wei, HUANG Jiaqi, XU Cong. Accumulation conditions and exploration potential of shale gas of Ziliujing Formation in Shizhu area,Sichuan Basin[J]. Lithologic Reservoirs, 2020, 32(1): 27–35.

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四川盆地石柱地区自流井组页岩气成藏条件与勘探前景

Accumulation conditions and exploration potential of shale gas of Ziliujing Formation in Shizhu area,Sichuan Basin

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