松辽盆地长岭断陷沙河子组页岩岩相特征及其对孔隙结构的控制

张瀛涵; 李卓; 刘冬冬; 高凤琳; 姜振学; 梁志凯; 杨东旭; 于海龙

doi:10.11781/sysydz201901142

松辽盆地长岭断陷沙河子组页岩岩相特征及其对孔隙结构的控制

doi: 10.11781/sysydz201901142

张瀛涵^1,2,
李卓^1,2, ,,
刘冬冬^1,2,
高凤琳^1,2,
姜振学^1,2,
梁志凯^1,2,
杨东旭^1,2,
于海龙^1,2

1. 中国石油大学(北京) 油气资源与工程国家重点实验室, 北京 102249;
2. 中国石油大学(北京) 非常规天然气研究院, 北京 102249

基金项目:

国家科技重大专项（2016ZX05034-001-005）和国家自然科学基金（41502123）联合资助。

详细信息

作者简介:
张瀛涵(1994-),男,在读硕士研究生,非常规石油地质研究方向。E-mail:zhangyinghan0801@foxmail.com。

通讯作者:
李卓(1984-),男,博士,助理研究员,从事非常规油气地质研究。E-mail:lizhuopaper@163.com。

中图分类号: TE122.2
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出版历程
- 收稿日期: 2018-09-02
- 修回日期: 2018-11-15
- 刊出日期: 2019-01-28

Lithofacies characteristics and impact on pore structure of the Shahezi Formation shale, Changling Fault Depression, Songliao Basin

1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
2. Institute of Unconventional Natural Gas Research, China University of Petroleum, Beijing 102249, China

摘要

摘要: 依据松辽盆地长岭断陷沙河子组页岩特征、有机质丰度和矿物含量建立岩相划分方案，把研究区页岩划分为7种岩相，在此基础上开展扫描电镜、CO₂和N₂吸附以及高压压汞实验以分析孔隙结构。研究区沙河子组页岩孔隙发育，不同岩相发育的主要孔隙类型也不相同，有机质孔隙主要发育在黏土质页岩中。页岩孔径呈现多峰分布特征，中孔是孔体积的主要贡献者，平均占50.9%；微孔是比表面积的主要贡献者，平均占67.8%。微孔发育主要受黏土矿物控制，中孔发育受碳酸盐矿物控制，宏孔发育受脆性矿物和黏土矿物联合控制。富有机质黏土质页岩对比表面积和孔体积的影响明显，对沙河子组页岩孔隙发育起主要控制作用。
- 页岩岩相 /
- 孔隙结构 /
- 黏土质页岩 /
- 沙河子组 /
- 长岭断陷 /
- 松辽盆地
Abstract: A lithofacies classification was established based on TOC and XRD data on cores of the Shahezi Formation in the Changling Fault Depression of the Songliao Basin. There are 7 lithofacies in the study area. Scanning electron microscopy, CO₂ and N₂ adsorption and high pressure mercury intrusion experiments were applied to quantitatively characterize pore structure. Shale pores were developed in the Shahezi Formation, and the pore types of different lithofacies were also different. Organic matter pores were mainly developed in argillaceous shale. Shale pore size exhibited a multi-peak distribution. Mesopores were the main contributors to pore volume, accounting for an average of 50.9%. Micropores were the main contributors to specific surface area, accounting for an average of 67.8%. The development of micropores was mainly controlled by clay minerals, the development of mesopores was controlled by carbonate minerals, while the development of macropores was controlled by the combination of siliceous and clay minerals. The organic-rich argillaceous rock influenced the surface area and pore volume, and played a major role in controlling shale pore development of the Shahezi Formation.
- shale lithofacies /
- pore structure /
- argillaceous shale /
- Shahezi Formation /
- Changling Fault Depression /
- Songliao Basin

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