石油学报 ›› 2013, Vol. 34 ›› Issue (4): 647-659.DOI: 10.7623/syxb201304004

• 地质勘探 • 上一篇    下一篇

塔里木盆地侏罗系泥页岩储层特征与页岩气成藏地质背景

高小跃1,2, 刘洛夫1,2, 尚晓庆1,2, 王英1,2, 苏天喜1,2, 戴琦雯1,2   

  1. 1. 中国石油大学油气资源与探测国家重点实验室 北京 102249;
    2. 中国石油大学盆地与油藏研究中心 北京 102249
  • 收稿日期:2013-02-06 修回日期:2013-05-08 出版日期:2013-07-25 发布日期:2013-07-04
  • 通讯作者: 刘洛夫,男,1958年11月生,1982年获江汉石油学院工学学士学位,1992年获英国BRISTOL大学博士学位,现为中国石油大学(北京)教授,主要从事石油地质及油气地球化学方面的研究。Email:liulf@cup.edu.cn
  • 作者简介:高小跃,男,1983年6月生,2007年获辽宁工程技术大学学士学位,2010年获辽宁工程技术大学硕士学位,现为中国石油大学(北京)博士研究生,主要从事沉积(岩石)学及储层地质学方面的研究。Email:xygao073000@qq.com
  • 基金资助:

    国土资源部"全国页岩气资源潜力调查评价及有利区优选"项目(2009GYXQ15-09-00)和油气资源与探测国家重点实验室课题(prp2009-02)资助。

Characterization of Jurassic shale reservoirs and the geological background of shale gas accumulations in Tarim Basin

GAO Xiaoyue1,2, LIU Luofu1,2, SHANG Xiaoqing1,2, WANG Ying1,2, SU Tianxi1,2, DAI Qiwen1,2   

  1. 1. State Key Laboratory of Petroleum Resources & Prospecting, China University of Petroleum, Beijing 102249, China;
    2. Basin & Reservoir Research Center, China University of Petroleum, Beijing 102249, China
  • Received:2013-02-06 Revised:2013-05-08 Online:2013-07-25 Published:2013-07-04

摘要:

页岩气作为重要的非常规能源之一,具有巨大的勘探和开发前景。中国塔里木盆地侏罗系泥页岩作为典型的陆相泥页岩,主要发育于沼泽化浅湖、半深湖、河漫沼泽、河漫湖泊以及滨湖沼泽相,有机质类型以Ⅲ型为主,有机碳含量多介于0.5% ~3%,镜质体反射率多为0.5% ~2%。塔里木盆地侏罗系泥页岩累计厚度20~400 m,埋深主要介于2 000~8 000 m,主要分布于库车坳陷、塔西南地区以及塔东北地区。塔里木盆地侏罗系泥页岩矿物组成以石英和黏土矿物为主,黏土矿物以伊利石为主。岩石孔隙度主要介于0.5% ~4%,渗透率主要为0.006~0.01 mD。晶间孔、溶蚀孔、有机质孔等纳米级孔隙以及微裂隙较发育,常见微裂隙多为1~3 μm宽。泥页岩的最大吸附气量介于1~2 m3/t,最大吸附气量与总有机碳含量及黏土矿物含量呈良好的正相关关系。塔里木盆地侏罗系泥页岩储集性能较好,其分布及地球化学特征与美国五大含气页岩及四川盆地下古生界页岩相似,具有较大的页岩气勘探潜力和开发前景,库车坳陷和塔西南地区是最为有利的页岩气发育区。

关键词: 储集性能, 孔隙类型, 矿物组成, 泥页岩, 侏罗系, 塔里木盆地

Abstract:

Shale gas, as one of the most important unconventional energy resources, is of an enormous prospect of exploration and exploitation. The Jurassic shale in the Tarim Basin is a typical continental deposit and is mainly deposited in swamped shallow lake, semi-deep lake, flooding swamp, flooding lake and lakeshore swamp facies. The organic matter is mainly of Type Ⅲ, with TOC varying between 0.5% ~3% and Ro between 0.5% ~2%. The Jurassic shale, with an accumulative thickness ranging between 20~400 m and burial depth between 2 000~8 000 m, is mainly deposited in the Kuqa Depression, northeastern and southwestern Tarim Basin. This Jurassic shale is mainly composed of quartz and clay minerals that are dominated by illite. The porosity ranges mainly between 0.5% and 4% and the permeability varies between 0.006 mD and 0.01 mD. Granular and intergranular pores, organic nanopores and micro-fractures with 1~3 μm in width are well developed. The maximum adsorption capacity of the shale varies between 1 m3/t and 2 m3/t and is in direct proportion to the organic matter abundance and clay mineral content. Generally, the Jurassic shale in the Tarim Basin shows good accumulation properties, its distributional and geochemical characteristics are comparable with the five series of gas-containing shales in U.S. and with the Lower Paleozoic shale in the Sichuan Basin. Therefore, the Jurassic shale in the Tarim Basin is favorable for shale gas accumulations and is of good potential in hydrocarbon exploration and exploitation. Specifically, the Kuqa depression and the southwestren Tarim are the most favorable areas for shale gas accumulations.

Key words: reservoir property, pore type, mineral composition, shale, Jurassic, Tarim Basin

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