天然气地球科学

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海相和陆相页岩储层微观结构差异性分析

管全中,董大忠,王淑芳,黄金亮,王玉满,张晨   

  1. (1.中国石油勘探开发研究院,北京 100083;2.国家能源页岩气研发(实验)中心,河北 廊坊 065007)
  • 收稿日期:2015-07-13 修回日期:2015-11-27 出版日期:2016-03-10 发布日期:2016-03-10
  • 通讯作者: 董大忠(1962-),男,四川苍溪人,教授级高级工程师,博士,主要从事油气资源与发展战略、非常规油气资源地质勘探与开发等方面的研究工作.E-mail:ddz@petrochina.com.cn.
  • 作者简介:管全中(1989-),男,安徽六安人,硕士研究生,主要从事页岩储层描述与资源评价研究. E-mail:muchang503@126.com.
  • 基金资助:

    国家科技重大专项“页岩气重点地区资源评价”(编号:2011ZX05018-001);国家重点基础研究发展计划(“973”计划)项目(编号:2013CB228001)联合资助.

Analyses on differences of microstructure between marineand lacustrine facies shale reservoirs

Guan Quan-zhong,Dong Da-zhong,Wang Shu-fang,Huang Jin-liang,Wang Yu-man,Zhang Chen-chen   

  1. (1.Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China;
    2.National Energy Shale Gas R and D(Experiment)Center,Langfang 065007,China)
  • Received:2015-07-13 Revised:2015-11-27 Online:2016-03-10 Published:2016-03-10

摘要:

为了深入分析海相和陆相页岩储层微观结构特征,探讨两者差异性及其影响因素,运用氩离子—抛光扫描电镜、低温氮气吸附实验、核磁共振和数理统计等技术和方法,对我国发育的海相和陆相页岩储层从定性和定量2个方面进行了实验研究。对比发现:①海相页岩储层基质孔隙主要发育粒间孔和有机质孔,陆相则以无机孔为主;②海相页岩储层孔径普遍小于陆相页岩储层,但比表面积和孔容却异常发育;③海相页岩储层发育的微裂缝主要为构造缝,而陆相则以黏土矿物层间缝为主。通过分析认为矿物组成、有机质类型、热演化成熟度和构造活动期次是影响两者微观结构特征差异性的主控因素。

关键词: 海相, 陆相, 页岩储层, 微观结构, 差异性, 影响因素

Abstract:

In order to analyze microstructural characteristics of shale reservoirs from marine and lacustrine facies and discuss the differences and their influencing factors,Ar-ion milling-Scanning Electron Microscopy(Ar-SEM),N2 adsorption test,nuclear magnetic resonance(NMR)and mathematical statistics are used to study two facies sediments from qualitative and quantitative aspects.Three obvious results are found:(1)Marine facies shale reservoirs mainly have developed inter-particle pores and organic matter pores in matrix-related pores,but lacustrine facies shale have more non-organic pores;(2)Pore size of marine facies shale reservoirs is smaller than the lacustrine ones,but they have more BET and BJH;(3)Geological micro-fractures are more developed in the marine facies shale reservoirs,the lacustrine ones mainly contain more micro-fractures between clay layers.Mineral constituents,organic matter types,thermal maturity and tectonic activity times are key factors to affect the differences on microstructural characteristics of two facies shale reservoirs.

Key words: Marine facies, Lacustrine facies, Shale reservoirs, Microstructure, Difference, Effect factors

中图分类号: 

  • TE122.2

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