油气勘探

煤系烃源岩高—过成熟阶段生气模拟实验及地质意义

  • 高金亮 ,
  • 倪云燕 ,
  • 李伟 ,
  • 袁懿琳
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  • 中国石油勘探开发研究院,北京 100083
高金亮(1989-),男,山东潍坊人,博士,工程师,中国石油勘探开发研究院博士后,主要从事油气地球化学方面研究。地址:北京市海淀区学院路20号,中国石油勘探开发研究院实验中心,邮政编码:100083。E-mail: gaojinliang@petrochina.com.cn

收稿日期: 2019-10-10

  修回日期: 2020-03-10

  网络出版日期: 2020-07-20

基金资助

国家自然科学基金(41472120)

Pyrolysis of coal measure source rocks at highly to over mature stage and its geological implications

  • GAO Jinliang ,
  • NI Yunyan ,
  • LI Wei ,
  • YUAN Yilin
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  • Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China

Received date: 2019-10-10

  Revised date: 2020-03-10

  Online published: 2020-07-20

摘要

通过高温高压条件下有机质热模拟生烃实验探究水对于腐殖型有机质高—过成熟阶段生气特征的影响。实验结果表明,水对有机质热解生气特征的影响受有机质成熟度控制,过成熟条件下水对腐殖型有机质热解生气具有显著的促进作用,能够有效提高烃类气体产率。高—过成熟煤成气氢同位素组成主要受烃源岩成熟度控制,但受水的影响显著。中国高—过成熟煤系烃源岩广布,若地质条件下地层水能够参与有机质高—过成熟阶段的热解生烃反应,将大大提高深层煤系烃源岩的生气能力,从而提高深层煤成气资源潜力。图3表1参34

本文引用格式

高金亮 , 倪云燕 , 李伟 , 袁懿琳 . 煤系烃源岩高—过成熟阶段生气模拟实验及地质意义[J]. 石油勘探与开发, 2020 , 47(4) : 723 -729 . DOI: 10.11698/PED.2020.04.08

Abstract

The influence of water on gas generation from humic type organic matter at highly to over mature stage was investigated with thermal simulation experiments at high temperature and pressure. The result of the experiments indicates that the effect of water on gas generation was controlled by the thermal maturity of organic matter. Water could enhance gas generation and increase hydrocarbon gas yields significantly at over mature stage of humic type organic matter. Hydrogen isotopic compositions of coal-derived gases generated at highly to over mature stage were mainly controlled by thermal maturity of source rocks, but also affected by formation water. Highly and over mature coal measure source rocks are widely distributed in China. The hydrocarbon gas generation capacity of coal measure source rocks and resources potential of coal-derived gases in deep formations would be significantly enhanced assuming that formation water could be involved in the thermal cracking of highly to over mature organic matter in real geological settings.

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