石油学报 ›› 2015, Vol. 36 ›› Issue (12): 1495-1507.DOI: 10.7623/syxb201512004

• 地质勘探 • 上一篇    下一篇

吉木萨尔凹陷二叠系芦草沟组致密油储层岩石类型及特征

葸克来1, 操应长1, 朱如凯2, 邵雨3, 薛秀杰1, 王小军3, 高阳3, 张景3   

  1. 1. 中国石油大学地球科学与技术学院 山东青岛 266580;
    2. 中国石油勘探开发研究院 北京 100083;
    3. 中国石油新疆油田公司 新疆克拉玛依 834000
  • 收稿日期:2015-06-03 修回日期:2015-10-01 出版日期:2015-12-25 发布日期:2016-01-06
  • 通讯作者: 操应长,男,1969年1月生,1992年获石油大学学士学位,2003年获中国科学院博士学位,现为中国石油大学(华东)教授、博士生导师,主要从事沉积学、层序地层学及油气储层地质学方面的教学与科研工作。Email:cyc8391680@163.com
  • 作者简介:葸克来,男,1988年8月生,2010年获中国石油大学(华东)学士学位,现为中国石油大学(华东)博士研究生,主要从事油气储层地质学方面的科研工作。Email:kelai06016202@163.com
  • 基金资助:

    国家自然科学基金石油化工联合基金重点项目(No.U1262203)、国家重点基础研究发展计划(973)项目(2014CB239002)、中央高校基本科研业务费专项资金项目(15CX05007A、15CX08001A)和国家留学基金项目(201406450019)资助。

Rock types and characteristics of tight oil reservoir in Permian Lucaogou Formation,Jimsar sag

Xi Kelai1, Cao Yingchang1, Zhu Rukai2, Shao Yu3, Xue Xiujie1, Wang Xiaojun3, Gao Yang3, Zhang Jing3   

  1. 1. School of Geosciences, China University of Petroleum, Shandong Qingdao 266580, China;
    2. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
    3. PetroChina Xinjiang Oilfield Company, Xinjiang Karamay 834000, China
  • Received:2015-06-03 Revised:2015-10-01 Online:2015-12-25 Published:2016-01-06

摘要:

综合运用岩心观察、薄片鉴定、物性测试、高压压汞及有机碳含量分析等手段,以准噶尔盆地吉木萨尔凹陷吉174井二叠系芦草沟组致密油储层为研究对象,开展了岩石类型及特征的精细研究。结果表明,致密油储层岩石矿物成分复杂、岩石组分多样,为一种过渡型的混合沉积岩类。在岩石组分类型及特征研究的基础上,以有机质组分、陆源碎屑组分、碳酸盐组分及火山碎屑组分作为"四组分",陆源碎屑含量、碳酸盐含量及火山碎屑含量作为"三端元",形成了复杂混合沉积岩石"四组分三端元"划分命名方案,将研究区岩石划分为陆源碎屑岩类、碳酸盐岩类、火山碎屑岩类及正混积岩类4大类型,进一步划分为18小类。不同岩石类型储集空间均以次生孔隙为主,但各类岩石孔喉结构特征存在差异。研究区致密油储层岩石类型以碳酸盐岩类与陆源碎屑岩类为主,部分层段含有少量的火山碎屑岩类与正混积岩类,各类岩石的组构特征、储集性能及含油性存在明显差异,纵向分布具有一定的规律,并且岩石类型与有机碳含量、储层物性及含油性等存在较好的对应关系。

关键词: 岩石类型, 混合沉积岩, 致密油, 芦草沟组, 吉木萨尔凹陷, 准噶尔盆地

Abstract:

Based on the core observation, thin section identification, physical property test, high-pressure mercury injection, organic carbon content analysis and other methods, a detailed study was performed on rock types and characteristics by taking the tight oil reservoirs of Well Ji 174 in Permian Lucaogou Formation, Jimsar sag as the research target. The results show that tight reservoir rocks are characterized by complex mineral compositions and multiple rock components, classified as transitional mixed sedimentary rocks. Based on the research on rock component types and characteristics, organic matter, terrigenous detrital, carbonate and pyroclastic debris are taken as "four components", and the contents of terrigenous detrital, carbonate and pyroclastic debris are taken as "three end-members" to form the dividing and naming scheme for complex mixed sedimentary rocks as "four components and three end-members". The rocks in the study area are divided to four major types, i.e., terrigenous detrital rocks, carbonate rocks, pyroclastic rocks and normal mixed sedimentary rocks, and further 18 subclasses. The reserving spaces of different rock types are all dominated by secondary pores, but differences exist in the pore-throat structure characteristics of various rock types. The rock types of tight oil reservoirs are dominated by carbonate rocks and terrigenous detrital rocks, while certain segments contain a small number of pyroclastic rocks and normal mixed sedimentary rocks. There are significant differences in component structure characteristics, reserving performance and oil-bearing property of various rocks, but showing a certain law in vertical distribution. Meanwhile, rock types have a good correspondence to organic carbon content, reservoir physical property and oil-bearing property.

Key words: rock types, mixed sedimentary rocks, tight oil, Lucaogou Formation, Jimsar sag, Junggar Basin

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