黔北绥阳地区五峰—龙马溪组富有机质泥岩特征及意义

康建威; 闫剑飞; 余谦; 田景春; 门玉澎; 孙媛媛

doi:10.11781/sysydz201802185

黔北绥阳地区五峰—龙马溪组富有机质泥岩特征及意义

doi: 10.11781/sysydz201802185

1.
成都理工大学沉积地质研究院, 成都 610059
2. 中国地质调查局成都地质调查中心, 成都 610081

基金项目: 中国地质调查局“四川盆地下古生界海相页岩气基础地质调查”（DD20160176）资助。

详细信息

作者简介:
康建威(1980-),男,博士研究生,工程师,从事沉积与油气地质研究。E-mail:best_kang@163.com。

通讯作者:
闫剑飞(1979-),男,高级工程师,从事沉积与油气地质研究。E-mail:flyflags@126.com。

中图分类号: TE122.113
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出版历程
- 收稿日期: 2017-05-24
- 修回日期: 2018-02-02
- 刊出日期: 2018-03-28

Characteristics of organic-rich shale in Wufeng-Longmaxi formations in Suiyang area of northern Guizhou and its implication to shale gas

1.
Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China
2. Chengdu Center, China Geological Survey, Chengdu, Sichuan 610081, China

摘要

摘要: 黔北地区五峰-龙马溪组富有机质泥岩由黔北隆起向南厚度逐渐增大，沉积相分别由潮坪、浅水陆棚、深水陆棚组成。黔北绥阳地区枧坝剖面黑色泥岩厚度达33.1 m，沉积序列与黔北其他剖面具有一致性，但是与周边剖面相比其厚度明显增大，表明该区发育棚内洼地深水陆棚相沉积。枧坝剖面五峰-龙马溪组泥岩段有机碳含量在0.53%~6.04%之间，平均3.05%，热解峰温一般大于500℃，镜质体反射率处于1.93%~2.19%之间，平均为2.07%，热演化程度总体处于过成熟阶段；其脆性矿物平均含量70.5%，黏土矿物平均含量29.5%，具有高含脆性矿物特征。黔北绥阳地区具有良好的页岩气基本地质条件。
- 富有机质泥岩 /
- 五峰—龙马溪组 /
- 绥阳地区 /
- 黔北
Abstract: The organic-rich shale in the Wufeng-Longmaxi formations in the northern Guizhou was deposited in tide flat, shallow or deep continental seas, respectively, with an increasing thickness from north to south. The black shale in the Jianba section in the Suiyang area of the northern Guizhou has a thickness of 33.1 m, which is obviously thicker than the other sections even though they have similar sedimentary sequences, indicating for a sedimentary depression in this area. Organic carbon content in the Wufeng-Longmaxi formations ranges from 0.53% to 6.04%, with an average value of 3.05%. The T_max is generally higher than 500℃. The R_o ranges from 1.93% to 2.19%, with an average value of 2.07%, indicating for an over-mature stage. Brittle mineral content is high across the section, accounting for 70.5% in average. The discovery of the Jianba section sheds new light on shale gas exploration in the northern Guizhou.
- organic-rich mudstone /
- Wufeng-Longmaxi formations /
- Suiyang area /
- northern Guizhou

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