阿北凹陷下白垩统阿尔善组水下扇沉积特征  

Sedimentary features of the submarine fans in the Lower Cretaceous Arxan Formation,Abei depression,Nei Mongol

作　　者：刘忠宝[1] 刘晓[1] 苗峰[1] 黄兴文[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《沉积与特提斯地质》2005年第3期57-61,共5页Sedimentary Geology and Tethyan Geology

摘　　要：本文对二连盆地阿北凹陷主要产油层段阿尔善组水下扇体的沉积构造、粒度、重矿物以及电性等特征进行了详细的分析,并应用层序地层学方法将阿尔善组划分为2个三级层序,结合地震解释成果,首次以三级层序为单位勾绘了扇体平面形态展布图,确定了扇根、扇中和扇端3个亚相的沉积区域,建立了水下扇沉积相模式,并对其沉积演化做了简要的分析。The present paper gives a detailed description of sedimentary structures, grain sizes, heavy minerals and electrical properties of the submarine fans in the Lower Cretaceous Arxan Formation as important reservoir intervals in the Abei depression, Eren Basin. The Arxan Formation is divided into two third-order sequences with the aid of sequence stratigraphic analysis. The plans of the fans have been constructed on the basis of the preceding third-order sequences, well logs and seismic data. The depositional areas are delineated for the three sedimentary subfacies, i.e. proximal fan, midfan and distal fan. The sedimentary model is formulated for the submarine fans in the study area.

关 键 词：二连盆地 阿北凹陷 下白垩统 水下扇 内蒙古 

分 类 号：P512.2[天文地球—地质学]