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天然气地球科学

• 非常规天然气 • 上一篇    下一篇

鄂尔多斯盆地下寺湾地区长7段油溶相页岩气量影响因素及其分布特征

王香增，郝进，姜振学，郭超，邢金艳，李卓，唐相路   

  1. 1.陕西延长石油(集团)有限责任公司，陕西 西安 710075；
    2.中国石油大学(北京)油气资源与探测国家重点实验室，北京 102249；
    3.中国石油大学(北京)非常规天然气研究院，北京 102249；
    4.中国科学院地质与地球物理研究所,北京 100029；
    5.中国华电集团科学技术研究总院，北京 100160
  • 收稿日期:2014-09-14 修回日期:2014-09-29 出版日期:2015-04-10 发布日期:2015-04-10
  • 通讯作者: 郝进(1988-),男,陕西延安人,硕士研究生,主要从事非常规油气地质研究.E-mail:haojin19880811@163.com.
  • 作者简介:王香增(1968-),男,河南滑县人,教授级高级工程师,博士后,主要从事石油天然气勘探开发技术研究.E-mail:sxycpcwxz@126.com.
  • 基金资助:
    陕西省科技统筹创新工程计划项目(编号:2012KTZB03-03)；国家科技重大专项“大型油气田及煤层气开发”(编号:2011ZX05003-001)联合资助.

Influencing Factors and Distributions of the Oil Dissolved Shale Gas Contentof Member Chang 7 Shale in Xiasiwan Area,Ordos Basin

WANG Xiang-zeng，HAO Jin，JIANG Zhen-xue，GUO Chao，XING Jin-yan，LI Zhuo，TANG Xiang-lu   

  1. 1.Yanchang Petroleum(Group) Co.Ltd.,Xi′an 710075,China;
    2.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;
    3.Unconventional Natural Gas Institute,China University of Petroleum,Beijing 102249,China;
    4.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
    5.China Huadian Institute of Science & Technology,Beijing 100160,China
  • Received:2014-09-14 Revised:2014-09-29 Online:2015-04-10 Published:2015-04-10

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摘要：

处于有机质成熟阶段以生油为主的页岩储层中的油溶相页岩气是目前页岩气资源研究的薄弱环节。根据相似相溶的原理，影响油溶相页岩气量的主要因素为页岩储层中残留油含量和天然气在残留油的溶解度。通过有机地球化学分析测试、储层物性分析测试和等温吸附实验，并利用测井解释方法，对鄂尔多斯盆地下寺湾地区长7段页岩油溶相页岩气含气性影响因素及有利层段空间分布特征进行了分析。研究表明下寺湾地区长7段页岩具备油溶相页岩气大量生成的地质基础；下寺湾地区长7段油溶相页岩气含气量较大，介于0.18～0.52m3/t之间,平均为0.34m3/t，占总含气量的9%；研究区长73亚段是油溶相页岩气发育的最优层段，研究区长73亚段西南部油溶相页岩气含气量大于0.5m3/t，是油溶相页岩气发育的最有利区域。因此，在对鄂尔多斯盆地下寺湾地区长7段页岩气进行资源评价时，油溶相页岩气是值得重视的页岩气资源。

关键词: 油溶相页岩气, 含气量, 鄂尔多斯盆地, 长7段

Abstract:

The oil dissolved shale gas of shale reservoirs dominated by of oil generation during the mature stage is poorly studied for the shale gas resources currently.The influencing factors of the oil dissolved shale gas are residual oil content in shale reservoirs and solubility of residual oil dissolved natural gas according to the principle of “similarity and intermiscibility”.In order to further study the influencing factors and distribution of the oil dissolved shale gas content,this study conducts organic geochemical analysis,reservoir porosity analysis,isothermal adsorption experiment and log interpretation of part of member Chang 7 shale samples in Xiasiwan area,Ordos Basin.The result shows that member Chang 7 shale in Xiasiwan area has the geological basis to generate enormous oil dissolved shale gas.The oil dissolved shale gas content of member Chang 7 shale in Xiasiwan area is large,ranging from 0.18-0.52m3/t,with an average of 0.34m3/t and an average proportion of the total gas content of 9%.The result also shows that submember 73 is the most advantage interval of the oil dissolved shale gas and the oil dissolved shale gas content is more than 0.5m3/t in the southwestern of submember 73 which is the most favorable region of oil dissolved shale gas.In conclusion,the oil dissolved shale gas is noteworthy shale gas resources when we evaluate the shale gas resources of member Chang 7 shale in Xiasiwan area,Ordos Basin.

Key words: The oil dissolved shale gas, Gas content, Ordos Basin, Member Chang 7

中图分类号: 

  • TE122.1+1

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