石油学报 ›› 2003, Vol. 24 ›› Issue (5): 21-25.DOI: 10.7623/syxb200305005

• 地质勘探 • 上一篇    下一篇

柴达木盆地北缘地区含油气系统划分与成藏历史分析

王永卓1,2, 孙德君2, 徐景祯3   

  1. 1. 中国矿业大学, 北京, 100083;
    2. 大庆油田有限责任公司, 黑龙江大庆, 163453;
    3. 大庆石油学院, 黑龙江大庆, 163318
  • 收稿日期:2002-07-19 修回日期:2003-03-20 出版日期:2003-09-25 发布日期:2010-05-21
  • 作者简介:王永卓,男,1965年4月生,1986年毕业于大庆石油学院,现为大庆油田公司勘探部高级工程师,中国矿业大学(北京)资源与地球科学系在读博士研究生,研究方向为油气田勘探.

Petroleum system division and reservoir-forming history analysis on the northern edge in Qaidam Basin

WANG Yong-zhuo1,2, SUN De-jun2, XU Jing-zhen3   

  1. 1. China University of Mining and Technology, Beijing 100083, China;
    2. Daqing Oilfield Company, Limited, Daqing 163453, China;
    3. Daqing Petroleum Institute, Daqing 163318, China
  • Received:2002-07-19 Revised:2003-03-20 Online:2003-09-25 Published:2010-05-21

摘要: 通过对柴北缘烃源岩演化历史模拟和油气源对比,分析了其成藏历史,研究并划分了该区的含油气系统.得出的主要结果是:①柴北缘主要烃源岩为中、下侏罗统煤系烃源岩,分为Ⅰ、Ⅱ1、Ⅱ2、Ⅲ1、Ⅲ25种有机质类型;②中、下侏罗统烃源岩大多已超过过成熟阶段.下侏罗统在上干柴沟组-下油砂山组沉积时期进入大量生、排烃阶段,中侏罗统则在下油砂山组-狮子沟组沉积时期进入生、排烃阶段;③柴北缘可分为两个含油气系统:一个是J1-R(!)含油气系统,生、排烃阶段在下干柴沟组-上油砂山组沉积时期;另一个是J2-J3(!)含油气系统,生、排烃阶段在下油砂山组-狮子沟组沉积时期.

关键词: 柴达木盆地, 北缘, 烃源岩演化, 油气源对比, 含油气系统, 成藏历史

Abstract: The petroleum system division and reservoir-forming history of the Northern Fringe in Qaidam Basin were studied on the basis of characteristic description, evolution modeling and oil-to-source correlation of hydrocarbon source rocks.It is concluded that the primary hydrocarbon source rocks in the fringe are those source rocks developed in Middle-Lower Jurassic,including mudstone in coal measure,carbonaceous mudstone and coal seam.There are five types of organic matters(Ⅰ,Ⅱ1,Ⅱ2,Ⅲ1 and Ⅲ2) in those source rocks.Most of the Middle-Lower Jurassic source rocks are in the over-maturity stage.The source rocks are of the maximum accumulative generation intensity over ten thousands kg/m2 and expulsive intensity over four thousands kg/m2 in the stage of the Upper Gancaigou Formation to the Lower Youshashan Formation of the Lower Jurassic,while maximum accumulative generation intensity is over two thousands kg/m2 and expulsive intensity is below one thousands kg/m2 in the Middle Jurassic.There are two petroleum systems in this fringe.One is in J1-R(!) oil and gas system,and the key moment for hydrocarbon generation and expulsion is in the deposition stage of Lower Ganchaigou to Upper Youshashan Formation.Another is in J2-J3(!) system with a key moment during deposition of Lower Youshashan-Shizhigou Formation.

Key words: Qaidam Basin, northern fringe, hydrocarbon source rock evolution, oil-to source correlation, petroleum system, reservoir forming history

中图分类号: