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页岩气保存机制探讨

范明 俞凌杰 徐二社 杨振恒 张文涛 刘伟新

范明, 俞凌杰, 徐二社, 杨振恒, 张文涛, 刘伟新. 页岩气保存机制探讨[J]. 石油实验地质, 2018, 40(1): 126-132. doi: 10.11781/sysydz201801126
引用本文: 范明, 俞凌杰, 徐二社, 杨振恒, 张文涛, 刘伟新. 页岩气保存机制探讨[J]. 石油实验地质, 2018, 40(1): 126-132. doi: 10.11781/sysydz201801126
FAN Ming, YU Lingjie, ZHANG Wentao, LIU Weixin, XU Ershe, YANG Zhenheng. Preservation mechanism of Fuling shale gas[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(1): 126-132. doi: 10.11781/sysydz201801126
Citation: FAN Ming, YU Lingjie, ZHANG Wentao, LIU Weixin, XU Ershe, YANG Zhenheng. Preservation mechanism of Fuling shale gas[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(1): 126-132. doi: 10.11781/sysydz201801126

页岩气保存机制探讨

doi: 10.11781/sysydz201801126
基金项目: 国家重点基础研究发展计划(973计划)项目“下古生界油气封盖机理与盖层有效性评价”(2012CB214803)资助。
详细信息
    作者简介:

    范明(1964-),男,博士,教授级高级工程师,从事实验地质学及页岩气研究工作。E-mail:Fanming.syky@sinopec.com。

  • 中图分类号: TE132.2

Preservation mechanism of Fuling shale gas

  • 摘要: 常规天然气与页岩气在储集空间上的本质差别就是孔径或孔隙结构的差异。根据四川盆地涪陵焦石坝地区页岩埋藏史、含气量、生产数据及解吸气同位素分馏这4方面资料,指出页岩气是以单个或多个有机质碎片所形成的连通孔隙网络为单元被保存在页岩中,毛管压力与静水压力是页岩气孔隙压力的保存机制,因此页岩的富气程度不受构造形态或圈闭的控制。构造活动对页岩气保存条件的破坏主要决定于构造升降对静水压力破坏及地质应力对页岩页理面的破坏程度,水平挤压条件下层理面张开所引起的毛管封闭能力下降,导致页岩气散失。而断层往往是应力释放区域,使页理面不会受到进一步的破坏,相反可能对下盘起到保护作用,成为页岩气的有利勘探目标。根据毛管力原理可进一步估算页岩气的可采收率,从而为勘探开发提供指导。

     

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出版历程
  • 收稿日期:  2017-10-11
  • 修回日期:  2018-01-02
  • 刊出日期:  2018-01-28

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