学术
准噶尔盆地腹部油气充注与再次运移研究
邹华耀[1] 郝芳[1] 张柏桥[2] 陈斌[1]
[1]石油大学资源与信息学院,北京102249 [2]中国地质大学石油系,武汉430074
摘 要:
准噶尔盆地为一个经历多期构造运动的叠合型盆地。盆地腹部油气藏形成与演化是一个受多源、多期次油气充注与再次调整的复杂过程。采用烃源岩生烃史正演模拟与油气藏地质、地球化学反演分析相互验证的方法，表明腹部油气运聚可以分为早期、晚期和后期油气充注，即：早白垩世前的早期原油充注阶段，原油主要来自于下二叠统风城组烃源岩；晚白垩世以原油充注为主的晚期充注阶段，原油主要来源于上二叠统下乌尔禾组烃源岩；古近纪以来以天然气充注为主的后期充注阶段，天然气来自于风城组和下乌尔禾组烃源岩高-过成熟阶段的产物。受喜马拉雅构造运动的影响，形成于中-晚燕山期的腹部车-莫古隆起发生掀斜作用，致使油气发生再次运移，调整后的腹部油气藏呈分散和小规模分布，油气藏类型由以构造圈闭为主变成以地层／岩性圈闭为主。[著者文摘]
文章出处:
《地质科学》-2005年40卷4期 -499-509页
分 类 号:
文献标识码:
A
文章编号:
0563-5020（2005）04-0499-11
HISTORY OF HYDROCARBON-FILLING AND REMIGRATING IN HINTERLAND OF THE JUNGGAR BASIN
Zou Huayao, Hao Fang, Zhang Boqiao, Chen Bin（1. Faculty of Natural Resources and Technology Information, University of Petroleum, Beijing 102249 ; 2. Department of Petroleum, China University of Geosciences, Wuhan 430074）
Abstract:
The Junggar Basin, as a typical superimposed one, experienced multiple phase tectonic activities from the Palaeozoic. The history of hydrocarbon-filling and migrating in the hinterland of the basin were reconstructed by hydrocarbon-generating modeling combined with reservoir geochemistry analyses. The study indicated that the hydrocarbon-filling process could be roughly divided into three episodes with varied maturity oil or/and gas which originated from different source layers. The early oil-filling occurred before Late Cretaceous and sourced from the Fengcheng Formation （ the Lower Permian） , the middle period of oil-filling was during Late Cretaceous and from the Xiawuerhe Formation （ the Upper Permian） , and the last period of gas-filling came about since the Paleogene and from the over-mature Fengcheng and Xiawuerhe Formations. A giant palaeohigh, called the Che-Mo Palaeohigh which created in the hinterland of the Junggar Basin during the Yanshanian orogeny （ mainly in the end of Middle Jurassic） , was tilted by the Himalayan tectonics. Simultaneously, a large amount of hydrocarbons （mostly oil） migrated again out of the tilting structure traps in the vicinity of the Che-Mo Palaeohigh, leaving behind some sporadically-distributed stratigraphic traps with partly-filled hydrocarbons.[著者文摘]
Key words:
Hydrocarbon-filling, Remigrating of oil-gas, Accumulation history, Hinterland of the Junggar Basin
基金资助:
国家杰出青年科学基金项目（批准号：40125008）资助.致谢 烃类包裹体检测由中国石油勘探开发研究院张鼐高级工程师完成,石油大学王飞宇教授提供了有关烃类包裹体检测方面的宝贵建议,在此深表谢意.
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