庆南地区中生界构造演化及勘探前景浅析

TECTONIC EVOLUTION AND EXPLORATION PROSPECTS OF MESOZOIC AT THE REGION ON THE SOUTH OF QINGYANG

鄂尔多斯盆地庆南地区 ,现今构造位置上横跨鄂尔多斯盆地天环向斜与伊陕斜坡南部及渭北隆起三个次级构造单元。本区的油气勘探应注重构造演化分区的差异性 ,研究表明 ,在同一构造旋回中、或不同的构造阶段 ,构造演化在继承、发展与改造上均表现出分区差异的特点 ,在研究区范围内 ,中生界以来的构造演化及其构造变形可大致分为三种类型区 ,即 :早隆晚凹向斜区、早凹晚隆单斜区和继承性隆起区 ;根据构造演化和油气地质条件的综合评价 ,其油气运聚条件及油气勘探前景均有差异。研究认为本区西部自身烃源极为重要 ,而东部地区则应重视储层的寻找 ,燕山期的构造演化对本区的油气的运移。

Present structural location of the region on the south of Qingyang in E'erduosi Basin occupies three secondary structural elements,i.e.Tianhuan Syncline,the south of Yishaan Slope and Weibei Uplift.We should pay more attention to the diversity of tectonic evolution in oil and gas exploration at the region.Through research,it is indicated that in the same tectonic cycle or in different tectonic stages,the tectonic evolution show various characteristics in inheritance,development and reformation;within the re...