摘要
伦坡拉盆地的地质背景较为独特而又复杂."豆夹形"的走滑盆地构型,断-坳转换过程中体现出的"迟到早退"双层地质结构,发育于盆地内部的变换构造以及后期冲断隆升、逆掩推覆的强烈变盆改造等,形成了两套盆地含油气系统,3个成油单元,多种类型的成藏组合的油气地质特征.通过对以上成油气地质特征的分析认为:(1)上部含油气系统的油气潜力比下部含油气系统要差;(2)生油凹陷主要分布在蒋日阿错次凹和爬错次凹的中南部与北部;(3)油气运移的主要指向和聚集区带位于盆地北部;(4)查清逆掩推覆体下伏的盆地原体和塘奴陇果变换带以及深部地层(牛堡组二段底部和牛堡组一段上部)的含油气性,是今后值得重视的3个勘探领域.
The geological background of Lunpola Basin is relatively particular and complicated such as the'pod-shaped'configuration of strike-slip basin,the'late coming and early leaving'double layered structure developed in the basin,and the strong deformation of the basin including thrusting,uprising and overthrusting.In such a background,there developed two petroleum systems,three hydrocarbon formation units,and various patterns of reservoir-forming combinations.According to the analysis on the geological features for hydrocarbon formation,it is suggested that:(1)the hydrocarbon potential in the upper petro- leum system is inferior to that in the lower system;(2)oil-generating depressions are mainly distributed in the south and north of Jiangjiacuo sub-depression and Pacuo sub-depression;(3)the main direction of migration and accumulation belt of hydrocarbon is located in the north of the basin;and(4)the autochthonous rocks under the overthrusting nappes,Tanglulongguo transfering zone and deeper strata (the bottom of the second member and the upper part of the first member of Niubao Formation)are also three potential targets for the future exploration.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1996年第2期168-173,共6页
Earth Science-Journal of China University of Geosciences
基金
国家"八五"西藏地勘专项科研成果.
关键词
油气藏
地质特征
陆相盆地
第三纪
strike-slip basin
double layered structure
transfering structure
deformation of basin
Lunpola Basin
