塔里木盆地前石炭系顶面不整合面特征及其控油作用

THE CHARACTERISTICS OF THE UNCONFORMITY ON THE TOP OF PRECARBONIFEROUS AND ITS CONSTRAINTS ON OIL/GAS BEHAVIONR IN TARIM BASIN

艾华国 兰林英 张克银 吴亚军

Ai Huaguo Lan Linyin Zhang Keyin Wu Yajun

地质矿产部石油地质综合大队 湖北荆沙市434100

Conprehensive Research Institute of Pefroleum Geology, MGMR

本文详细地研究了塔里木盆地前石炭系顶面不整合(面)的形成机理、平面展布特征、不整合的控油及对油气的运、聚、保、破的作用。结果表明:断褶不整合、褶皱不整合、超覆不整合是控油意义较大的不整合,前石炭系顶面不整合面及其上、下的可渗透层是油气运移的良好通道,岩溶作用形成的次生储层和不整合面上的超覆砂体储层是油气聚集的良好场所。

In this paper,the formation mechanism and regional occurrence of the unconformity on the top of Precarboniferous in Tarim Basin were studied,and then,its constraints on the migration and accumulation of oil/gas,and roles in the preservation or destruction of pools were disccused. As the result,fault-flod umconformities,flod unconformities and onlay unconformities are that which significantly controlled oil/gas behaviour. The unconformity onthe top of Precarboniferous,together with the permeable zones immediately adjoining it,could act as conduits for oil/gas migration the scondary reserviors by dissolution and the onlay sandstone over the uncoformity could be the sites of oil/gas accumulation.

https://doi.org/10.11781/sysydz199601001