松辽盆地南部上侏罗一下白垩统层序地层特征及油气勘探意义

THE CHARACTRISTICS OF THE UPPER JURASSIC─LOWEKR CRETACEOUS SEQUENCE STRATIGRAPHY AND THEIR SIGNIFICANCE IN HYDROCARBON EXPLORATION IN THE SOUTHERN SONGLIAO BASIN

笔者应用层序地层学的基本概念和研究方法初步解释了松辽盆地南部上侏罗一下白垩统的层序，──４个层序可从地震剖面和钻井资料中解释，每个层序又可进一步划分出３种体系域。体系域的沉积和岩相的分布明显受构造沉降为主、水面升降为辅的双重控制。同时建立了两种层序地层格架，指出具有十屋断陷型地层格架的断陷盆地生储盖配置良好，有较好的油气潜力。

ln using of the basic concepts and research method of sequence stratigraphy,the Up-per Jurassic─Lower Cretaceous sequences were preliminarily divided into four sequencesaccording to seismic section and well data,each of which consisted of three system do-mains.The sedimentation of the domains and distribution of the lithofacies were mainlycontrolled by structural subsidence,while influnce of waterlevel changes subsidiary.Meanwhile,two kinds of sequence stratigraphic frameworks were established.The faultedbasin with Shiwu type(faulted depression)of strtigraphic framework has a favorable com-bination of generation, reservoir and seal of hydrocarbon,showing a good potentiality ofoil and gas resources.