地学前缘 ›› 2016, Vol. 23 ›› Issue (5): 56-65.DOI: 10.13745/j.esf.2016.05.006

• 沉积与储层 • 上一篇    下一篇

柴北缘东段克鲁克组泥页岩储层特征

 陈世悦, 刘金, 马帅, 刘成林   

  1. 1. 中国石油大学(华东) 地球科学与技术学院, 山东 青岛 266580
    2. 中国石油新疆油田分公司 陆梁作业区, 新疆 克拉玛依 834000
    3. 中国地质科学院 地质力学研究所, 北京 100081
  • 收稿日期:2015-10-15 修回日期:2016-01-15 出版日期:2016-09-15 发布日期:2016-09-15
  • 通讯作者: 刘金(1989—)，男，助理工程师，主要从事油气储层预测与评价方面的研究。E-mail:602393581@qq.com
  • 作者简介:陈世悦(1963—)，男，教授，博士生导师，主要从事沉积学及岩相古地理研究工作。
  • 基金资助:

    中国地质调查局地质调查项目(1212010818054,1212011120964);国家自然科学基金项目(41372107)

Characteristics of Keluke shale reservoirs in northeast margin of Qaidam Basin.

 CHEN  Shi-Yue, LIU  Jin, MA  Shuai, LIU  Cheng-Lin   

  1. 1. School of Geosciences, China University of Petroleum(East China), Qingdao 266580, China
    2. Luliang Oilfield Operation District, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China
    3. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
  • Received:2015-10-15 Revised:2016-01-15 Online:2016-09-15 Published:2016-09-15

PDF (PC)

16641

摘要：

柴北缘东段石炭系克鲁克组为一套海陆过渡相碎屑岩和碳酸盐岩混合沉积，其中泥页岩较为发育。通过野外剖面踏勘和实测对克鲁克组泥页岩纵向发育特征进行了研究，发现克鲁克组一段泥页岩累计厚度为60 m，泥地比达92.6%，是泥页岩发育最好的层段。通过精细岩心观察描述、全岩X射线衍射分析、岩石薄片鉴定、扫描电镜观察及物性分析等，对泥页岩矿物组成、岩相、储集空间类型及物性特征进行了研究，结果表明，泥页岩矿物组成以石英和黏土矿物为主；黑色纹层状泥质中粉砂岩相、灰黑色条带状泥质粗粉砂岩相、灰黑色条带状含灰灰质泥质粗粉砂岩相和黑色纹层状含生物碎屑泥质中粉砂岩相为主要的岩相类型；储集空间主要发育顺层裂缝、溶蚀孔隙、黏土矿物晶间孔、有机质粒内孔隙及生物碎屑粒内孔；孔隙度在1%~3%，渗透率分布在0.01~1 mD。储层的发育主要受沉积环境、矿物组成和成岩作用的影响，黑色纹层状泥质中粉砂岩相和灰黑色条带状泥质粗粉砂岩相由于沉积厚度大、碳酸盐胶结作用弱、脆性指数较高、储集性能良好，有利于泥页岩储层的发育。

关键词: 泥页岩, 储层特征, 克鲁克组, 柴北缘

Abstract:

Keluke Formation in the northeast margin of Qaidam Basin was mixed deposits of clastic rock and carbonate rock in transitional facies, in which shales were well developed. The shales’ distribution was studied by observation of the outcrops, and we found that the first section of Keluke Formation was the most beneficial shale exploration target with 60 meters thick in total and 92.6 percent of the ratio shales/stata. The characteristics of mineral composition, lithofacies, reservoir space types and physical properties were studied by detailed description of cores, analysis of thinsection, physical property, Xray diffraction and electron microscopy. The results showed that the mineral composition was dominantly clastic quartz and clay minerals; the main types of lithofacies were dark lamellar siltstone with mediumsized silt, black gray banded siltstone with coarsesized silt, black gray banded siltstone with coarsesized silt and carbonate and dark lamellar siltstone with mediumsized silt, bioclasts, etc. Interlayer lamellation crack, dissolution pores, the intercrystal pores, organicmatter pores and intraparticle pores were well developed in the shales; porosity has the range of 1%3%, permeability ranges between 0.01 and 1 mD. The development of shale reservoirs was affected by the sedimentary environment, mineral composition and diageneses, and the dark lamellar siltstone with mediumsized silt and black gray banded siltstone with coarsesized silt were the good lithofacies for shale reservoirs because of their large thickness, weak cementation of carbonate, high brittleness and good reservoir properties.

Key words: shales, characteristics of reservior, Keluke Formation, the northeast margin of Qaidam Basin

中图分类号: