天然气地质学

一种可能的页岩有机孔隙演化机理——以下扬子大隆组页岩为例

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  • (中国石化华东分公司石油勘探开发研究院,江苏 扬州 225007)
王亮(1985-),男,湖南常德人,博士,主要从事页岩气储层微观研究. E-mail:wangliang207@mails.ucas.ac.cn.

收稿日期: 2015-07-28

  修回日期: 2016-01-26

  网络出版日期: 2016-03-10

基金资助

中国石化科技项目(编号:P14075)资助.

A possible mechanism of organic pores evolution in shale: A case from Dalong Formation,Lower Yangtze area

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  • (Research Institute of Petroleum Exploration and Development,East China Branch,SINOPEC,Yangzhou 225007,China)

Received date: 2015-07-28

  Revised date: 2016-01-26

  Online published: 2016-03-10

摘要

通过热模拟实验再现漫长地质年代过程中页岩有机质热演化的过程,并借助氩离子抛光—扫描电镜对页岩热模拟过程中产生的微观孔隙进行观察。结果显示,有机质热模拟过程中产生了多种不同类型的孔隙,如环带孔隙、高圆度有机质孔隙及海绵状小孔隙等,表明有机孔隙演化可能存在多种不同的机理。重点对环带孔隙进行研究,经过扫描电镜和能谱分析认为,环带孔隙是页岩中有机质热演化过程中特定阶段产生的孔隙类型,其中的环带结构为有机—矿物复合体,即有机质降解生烃的主要场所之一。这也是首次直接观测到有机—矿物复合体的存在。

本文引用格式

王亮,曹海虹 . 一种可能的页岩有机孔隙演化机理——以下扬子大隆组页岩为例[J]. 天然气地球科学, 2016 , 27(3) : 520 -523 . DOI: 10.11764/j.issn.1672-1926.2016.03.0520

Abstract

Organic pores structures and their possible evolution mechanisms were analyzed by Ar-ion milling/scanning electron microscope after thermal simulation experiment.Several kinds of organic pores including girdle pores,circular pores and spongy pores appeared during the thermal simulation process.This result shows that there are several different mechanisms in organic pores evolution.Girdle pore is a typical pore structure in particular period of hydrocarbons generation,and the girdle structure is organic matter-mineral complex where the hydrocarbons generate.It is also the first time to observe the organic matter-mineral complex.

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