石油学报 ›› 2013, Vol. 34 ›› Issue (6): 1070-1076.DOI: 10.7623/syxb201306005

• 地质勘探 • 上一篇    下一篇

西藏羌塘盆地羌D2井原油类型及其勘探意义

季长军1, 伊海生1,2, 陈志勇3, 夏国清1, 毛玲玲4, 李启来1, 胡贺伟5   

  1. 1. 成都理工大学 成都 610059;
    2. 油气藏地质及开发工程国家重点实验室 成都 610059;
    3. 中国石油勘探开发研究院 北京 100083;
    4. 重庆地质矿产研究院 重庆 400042;
    5. 中海石油(中国)有限公司天津分公司 天津 300452
  • 收稿日期:2013-05-17 修回日期:2013-08-16 出版日期:2013-11-25 发布日期:2013-10-13
  • 通讯作者: 伊海生,男,1959年6月生,1982年获成都地质学院学士学位,1989年获成都地质学院博士学位,现为成都理工大学教授、博士生导师,主要从事沉积学及古地理学研究。Email:yhs@cdut.edu.cn
  • 作者简介:季长军,男,1986年11月生,2010年获长江大学学士学位,现为成都理工大学沉积地质研究院博士研究生,主要从事沉积学和石油地质学方向研究。Email:jichangjun2007@sina.com
  • 基金资助:

    国家自然科学基金项目“青藏高原北部东昆仑山新生代构造隆升的沉积碎屑记录”(No.40972084)资助。

Crude oil types of the Well Qiang D-2 in Qiangtang Basin, Tibet and its exploration significance

JI Changjun1, YI Haisheng1,2, CHEN Zhiyong3, XIA Guoqing1, MAO Lingling4, LI Qilai1, HU Hewei5   

  1. 1. Chengdu University of Technology, Chengdu 610059, China;
    2. State Key Laboratory of Oil-Gas Reservoir Geology & Exploitation, Chengdu 610059, China;
    3. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    4. Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China;
    5. Tianjin Company Ltd., China National Offshore Oil Corporation, Tianjin 300452, China
  • Received:2013-05-17 Revised:2013-08-16 Online:2013-11-25 Published:2013-10-13

摘要:

羌D2 井是目前羌塘盆地首口钻遇侏罗系布曲组含油层的地质井。通过对白云岩油层岩心样品系统采样和分析,发现钻井原油有两种类型。根据生物分子标志化合物中类异戊二烯烃、甾烷、萜烷系列进行的油源对比研究,初步认为羌塘盆地不同类型的两类原油可能有不同的来源,产自于不同环境的烃源岩之中。第一类原油来源于开阔海环境,生油母质以低等水生物为主,与侏罗系下统曲色组、中统布曲组烃源岩具有亲缘性;第二类原油来自于具有大量淡水注入的海湾河口环境,生油母质中高等植物标志显示明显,烃类可能来自侏罗系中统雀莫错组或夏里组烃源岩。该研究结果对确定羌塘盆地生油层系、圈定生烃洼陷具有指导意义。

关键词: 羌塘盆地, 羌D2井, 原油分类, 油源对比, 中侏罗统

Abstract:

The Qiang D-2 well is the first geological well which penetrates an oil-bearing horizon of the Jurassic Buqu Formation in the Qiangtang Basin. By systematic sampling and analyzing core samples from the dolomite oil-bearing horizon, two types of crude oils in the well can be classified. The oil-source correlation based on biomarker distributions of isoprenoid alkanes, steranes and terpanes indicated that these two types of crude oils are probably derived from source rocks deposited in different environments. The first type is an oil derived from an open marine environment dominated by lower aquatic organisms and its source rock shows a close affiliation with the Lower Jurassic Quse Formation and the Middle Jurassic Buqu Formation; while the second type is an oil derived from an estuarine environment with significant freshwater influence and terrestrial higher plant input and its source rock may be related with the Middle Jurassic Quemocuo Formation or Xiali Formation. The results of this study are of importance in the source kitchen identification and resource potential assessment of the Qiangtang Basin.

Key words: Qiangtang Basin, Well Qiang D-2, oil classification, oil-source correlation, Middle Jurassic

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