松辽盆地北部深层层序地层格架建立与模式研究——以古龙-常家围子断陷沙河子组为例

松辽盆地北部徐家围子等地区深层勘探相继取得了一系列重大突破，但由于古龙—常家围子断陷深层地质认识程度较低，该区还处于深层勘探初期阶段。古龙—常家围子断陷区沙河子组充填了一套扇三角洲和湖泊沉积，是该区重要的储层和生油层。综合利用测井、钻井、地震等资料，将层序地层学原理应用于陆相断陷湖盆沉积，识别出沙河子组三级层序顶底界面，将其划分为2个三级层序，并在层序内部识别出高水位体系域、水进体系域、低水位体系域，建立了该区高精度的等时层序地层格架。根据沙河子组地质结构和地层发育的构造背景,建立了沙河子组层序地层模式:双向多断阶层序模式、双箕状不对称层序模式。

The Establishment of Sequence Stratigraphic Framework and Its Models of Deep Formation in Northern Songliao Basin:Taking the Shahezi Formation of Gulong-Changjiaweizi Fault Depression as an example

The deep exploration of Northern Songliao Basin has got a series of breakthrough,such as Xujiaweizi,and so on.For the recognition of deep geology of Gulong-Changjiaweizi Fault Depression is lower,it is still at the early stage of deep exploration.The Shahezi Formation of the fault depression of Gulong-Changjiaweizi was filled by a suite of fan delta and lacustrine deposits,is the important reservoir bed and source bed.We utilized multipurposely the data of logging,drilling,seismic and so on,applied the theo...