贵州习水骑龙村奥陶系五峰组—志留系龙马溪组剖面

刘树根; 冉波; 叶玥豪; 王世玉; 杨迪; 罗超; 韩雨樾; 宋金民; 张旋

doi:10.13809/j.cnki.cn32-1825/te.2022.01.002

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贵州习水骑龙村奥陶系五峰组—志留系龙马溪组剖面

• 专家论坛 • | 更新时间：2025-12-11

- 贵州习水骑龙村奥陶系五峰组—志留系龙马溪组剖面
- Outcrop of Ordovician Wufeng Formation-Silurian Longmaxi Formation in Qilong Village, Xishui, Guizhou
- 油气藏评价与开发 2022年12卷第1期页码：10-28
- 作者机构：
  
  1. 油气藏地质及开发工程国家重点实验室（成都理工大学）,四川成都 610059西华大学,四川,成都,610039
  2. 西华大学,四川成都 610039陕西延长石油（集团）有限责任公司研究院,陕西,西安,710075
  3. 陕西延长石油（集团）有限责任公司研究院,陕西西安 710075中国石油西南油气田分公司,四川,成都,610041
  4. 中国石油西南油气田分公司,四川,成都,610041
- 作者简介：
  
  [ "刘树根（1964—）,男,研究生,教授,本刊第二届编委会委员,从事石油地质学与构造地质学的教学与科研工作。地址：四川省成都市成华区二仙桥东三段1号,邮政编码：610059。E-mail： lsg@cdut.edu.cn" ]
- 基金信息：
  
  国家自然科学基金企业联合基金02课题“海相深层碳酸盐岩层系油气成藏机理与开发方法”——“四川盆地震旦系—寒武系油气成藏过程与机理”(P19038);国家自然科学基金面上项目“川西地区深层雷口坡组微生物岩及其储层形成机理研究”(41872150)
- DOI：10.13809/j.cnki.cn32-1825/te.2022.01.002
  中图分类号： TE122
- 纸质出版：2022
- 稿件说明：
移动端阅览
刘树根, 冉波, 叶玥豪, 等. 贵州习水骑龙村奥陶系五峰组—志留系龙马溪组剖面[J]. 油气藏评价与开发, 2022,12(1):10-28.

LIU Shugen, RAN Bo, YE Yuehao, et al. Outcrop of Ordovician Wufeng Formation-Silurian Longmaxi Formation in Qilong Village, Xishui, Guizhou[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(1): 10-28.
刘树根, 冉波, 叶玥豪, 等. 贵州习水骑龙村奥陶系五峰组—志留系龙马溪组剖面[J]. 油气藏评价与开发, 2022,12(1):10-28. DOI： 10.13809/j.cnki.cn32-1825/te.2022.01.002.

LIU Shugen, RAN Bo, YE Yuehao, et al. Outcrop of Ordovician Wufeng Formation-Silurian Longmaxi Formation in Qilong Village, Xishui, Guizhou[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(1): 10-28. DOI： 10.13809/j.cnki.cn32-1825/te.2022.01.002.

摘要

对贵州习水骑龙村奥陶系五峰组—志留系龙马溪组剖面实测

通过古生物对比、薄片鉴定、扫描电镜和氮气吸附等方法对五峰组—龙马溪组开展了系统性的研究

其主要认识有：①骑龙村五峰组—龙马溪组剖面出露完整

与上覆志留系石牛栏组和下伏奥陶系涧草沟组均为整合接触

发育12个笔石带

无地层缺失;②骑龙村五峰组—龙马溪组剖面黑色页岩主要发育6种页岩岩相;③骑龙村五峰组—龙马溪组剖面页岩中的石英含量从底到顶逐渐减少

而黏土矿物却逐渐增加

因此脆性矿物的含量从底到顶逐渐减少

页岩易压裂性降低;④骑龙村剖面五峰组—龙马溪组有机质类型主要为Ⅰ型和Ⅱ

型

高总有机碳含量（

TOC

）优质页岩主要分布在五峰组和龙马溪组下段;⑤骑龙村剖面五峰组—龙马溪组古生产力相对较低

优质黑色页岩沉积环境为缺氧—贫氧条件

其有机质含量高得益于高有机质埋藏效率;⑥骑龙村剖面五峰组—龙马溪组有机质孔主要分布在龙马溪组下段和五峰组

龙马溪组上段与观音桥段有机质孔不发育

纵向上表现为小孔径孔隙占比随地层向上递减

大孔径孔隙占比随地层向上递增;⑦骑龙村剖面五峰组—龙马溪组天然气吸附量最小为1.62 m

最大为2.8 m

平均值为2.13 m

表现为

TOC

值越大

相应的吸附能力也越强

反映出有机质含量对富有机质页岩的含气能力起决定性的作用。

Abstract

As a systematic study of the Wufeng-Longmaxi Formation was carried out by paleontological comparison

thin section identification

scanning electron microscopy and Nitrogen Adsorption Method in Qilong Village outcrop

Xishui

Guizhou Province

the following main insights are obtained: ① The Wufeng-Longmaxi Formation in Qilong Village outcrop is complete

and is conformable with overlying Silurian Shiniulan Formation and the underlying Ordovician Jianc

aogou Formation

with 12 graptolite biozones developed and without unconformity; ② Based on a variety of sedimentary fabric features

six major shale lithofacies in the Wufeng-Longmaxi Formation are determined; ③ The quartz content of the Wufeng Longmaxi Formation decreases

while clay minerals increase gradually from the bottom to the top in Qilong Village outcrop

which shows the content of brittle minerals decreases

and a decrease of fracability of the shale from the bottom to the top; ④ The organic matter types of Wufeng-Longmaxi Formation in Qilong Village outcrop are mainly of type Ⅰ and type Ⅱ

and the high TOC shale is mainly distributed in the Wufeng and lower Longmaxi Formation; ⑤ There is relatively low paleoproductivity of the Wufeng-Longmaxi Formation in Qilong Village outcrop. The high quality black shale was deposited in anoxic-dysoxic conditions

and high content of organic matter benefits from the high burial efficiency of organic matter; ⑥ The organic pores of the Wufeng-Longmaxi Formation in Qilong Village outcrop are mainly distributed in Wufeng and lower Longmaxi Formation

while organic pores were not developed in the upper member of Longmaxi Formation or Guanyinqiao member. The abundance of the small pores vertically decreases with stratigraphy upwards and The abundance of the large pore increases with stratigraphy upwards; ⑦ The natural gas adsorption capacity of the Wufeng-Longmaxi Formation in Qilong Village outcrop is a minimum of 1.62 m

a maximum of 2.8 m

and an average value of 2.13 m

/t. This shows that the larger the

TOC

value is

the stronger the corresponding adsorption capacity will be

and indicates organic matter content plays a decisive role in gas-bearing capacity of organic-rich shales.

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