岩性油气藏 ›› 2017, Vol. 29 ›› Issue (3): 27–33.doi: 10.3969/j.issn.1673-8926.2017.03.004

• 油气地质 • 上一篇    下一篇

吉木萨尔凹陷芦草沟组致密油储层溶蚀孔隙特征及成因机理

闫林1, 冉启全1, 高阳2, 陈福利1, 王少军1, 李崇飞1   

  1. 1. 中国石油勘探开发研究院, 北京 100083;
    2. 中国石油新疆油田分公司 勘探开发研究院, 新疆 克拉玛依 834000
  • 收稿日期:2016-10-10 修回日期:2016-12-03 出版日期:2017-05-21 发布日期:2017-05-21
  • 作者简介:闫林(1978-),男,博士,高级工程师,主要从事复杂岩性油气藏及非常规油气开发地质研究。地址:(100083)北京市海淀区学院路20号910信箱中国石油勘探开发研究院油气开发软件中心。Email:yanlinbob@petrochina.com.cn。
  • 基金资助:
    国家重点基础研究发展计划（973计划）项目“陆相致密油甜点成因机制与精细表征”（编号：2015CB250901）资助

Characteristics and formation mechanism of dissolved pores in tight oil reservoirs of Lucaogou Formation in Jimsar Sag

YAN Lin1, RAN Qiquan1, GAO Yang2, CHEN Fuli1, WANG Shaojun1, LI Chongfei1   

  1. 1. Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    2. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China
  • Received:2016-10-10 Revised:2016-12-03 Online:2017-05-21 Published:2017-05-21

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摘要： 针对吉木萨尔凹陷芦草沟组致密油储层溶蚀孔隙较发育，但控制因素及成因机理认识程度低的问题，利用岩心、铸体薄片和扫描电镜观察以及物性测试等方法，结合矿物成分、油气成藏演化和成岩演化等分析，对研究区孔隙类型及特征、溶蚀孔隙成因机理及分布规律进行了研究。结果表明：吉木萨尔凹陷芦草沟组致密油陆源碎屑岩、内源沉积岩及火山碎屑岩3种岩石类型储层中均发育有溶蚀孔隙，其形成受内部和外部因素共同制约，有机酸溶蚀长石类及碳酸盐岩类等易溶矿物组分是其形成的主要方式；芦草沟组二段中部的岩屑长石粉细砂岩储层溶蚀孔隙发育程度高、物性好、厚度相对较大、平面分布较为稳定，是下一步致密油勘探开发的重点层位。

Abstract: Dissolved pores are well developed in tight oil reservoirs of Lucaogou Formation in Jimsar Sag, however, its controlling factors and formation mechanism are unclear. Combined with analyses of reservoir mineral composition, hydrocarbon accumulation evolution and diagenetic evolution, the data of cores, thin section, scanning electronic microscope and physical property test were used to study the pore types and characteristics, the genetic mechanism and distribution of dissolved pores of Lucaogou Formation. The results show that dissolved pores developed in terrigenous clastic rocks, endogenetic sedimentary rocks and volcanic clastic rocks, and the formation of the dissolved pores is influenced by internal and external factors. The soluble minerals such as feldspar and carbonate rocks dissolved by organic acid are the main formation way of the dissolved pores. The detritus feldspar fine sandstone reservoir in the middle of the second member of Lucaogou Formation, with well developed dissolved pores, good physical properties, large vertical thickness and stable plane distribution, is an important zone for the next tight oil exploration and development.

中图分类号: 

  • TE122.2
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