渝南黔北五峰组龙马溪组页岩气地质特征

西南石油大学学报（自然科学版）

2016年12月第38卷第6期

Journal of Southwest Petroleum University（Science&Technology Edition）

V ol.38No.6Dec.2016

DOI：10.11885/j.issn.16745086.2016.06.07.01

文章编号：16745086（2016）06004912

中图分类号：TE132

文献标志码：A

渝南黔北五峰组龙马溪组页岩气地质特征

康建威1，2*，余谦1，闫剑飞1，孙媛媛1，戚明辉3，4

1.成都地质调查中心，四川成都610081；

2.成都理工大学沉积地质研究院，四川成都，610059；

3.页岩气评价与开采四川省重点实验室，四川成都610091；

4.四川省煤田地质局，四川成都610072

摘要：通过大量野外露头、钻井岩芯观察，以下古生界五峰组龙马溪组富有机质泥岩为研究对象，结合有机地化、显微薄片、X衍射、孔渗、比表面积、扫描电镜等实验测试分析手段，综合分析了五峰组龙马溪组页岩气基本地质特征。研究表明，在浅水陆棚深水陆棚的沉积格局控制下，研究区富有机质页岩具有南薄北厚（10～80m）的分布特征；富有机质页岩总体平均有机碳含量大于2.0%，为腐泥型I型干酪根，有机质成熟度程度高（R o为0.82%～3.04%）；

富有机质泥岩物性特征为低孔低渗型，发育多种微观孔隙结构。在此基础上，通过页岩气区块优选和评价，认为安场道真向斜区具备良好的页岩气富集基础地质条件，具有良好的页岩气勘探前景。

关键词：渝南黔北；下古生界；富有机质页岩；页岩气地质条件

Geological Characteristics of Wufeng–Longmaxi Formations in Southern

Chongqing-Northern Guizhou Area

KANG Jianwei1，2*,YU Qian1,YAN Jianfei1,SUN Yuanyuan1,QI Minghui3，4

1.Chengdu Center,China Geological Survey,Chengdu,Sichuan610081,China

2.Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu,Sichuan610059,China

3.Sichuan Key Laboratory of Shale Gas Evaluation and Exploitation,Chengdu,Sichuan610091,China

4.Sichuan Coalfield Geology Bureau,Chengdu,Sichuan610072,China

Abstract：Through observation of outcrop,drilling core and the organic-rich mudstone in Wufeng-Longmaxi,and with or-ganic geochemistry,microscopic section,X-ray diffraction,pore permeability,specific surface area,and scanning electron microscope,we analyzed the basic geological characteristics of shale gas reservoir in Wufeng-Longmaxi formation.The analy-sis shows that the Wufeng-Longmaxi shelf environment is the foun-dation of organic rich mud shale.The sedimentary pattern of shallow shelf and deep water shelf determines the mudstone distribution which is thin in the South(10–80m).Deepwater mudstone average organic carbon content is greater than2.0%,and the organic matter is of type I kerogen of sapropel type, with high degree of maturity(R o=0.82%–3.04%).The reservoir is of low porosity and low permeability,with various micro pore structures.Through shale gas block assessment and selection,we conclude that the Anchang-Daozhensyncline area is of favorable geological conditions for shale gas enrichment and has a good prospect for shale gas exploration.

Key words：Southern Chongqing–northern Guizhou;Wufeng–Longmaxi formations;organic-rich mudstone;shale gas geolo-gical condition

网络出版地址：http：//https://www.wendangku.net/doc/b1910825.html,/kcms/detail/51.1718.TE.20161116.1104.002.html

康建威，余谦，闫剑飞，等．渝南黔北五峰组龙马溪组页岩气地质特征[J]．西南石油大学学报（自然科学版），2016，38（6）：4960．KANG Jianwei,YU Qian,YAN Jianfei,et al．Geological Characteristics of Wufeng–Longmaxi Formations in Southern Chongqing-Northern Guizhou Area[J]．Journal of Southwest Petroleum University（Science&Technology Edition），2016，38（6）：4960．

*收稿日期：20160607网络出版时间：20161116

通信作者：康建威，E-mail：best_kang@https://www.wendangku.net/doc/b1910825.html,

基金项目：中国地质调查局项目（12120114071701）。

万方数据