鄂尔多斯盆地东南区山西组沉积相与储层特征

下二叠统山西组为鄂尔多斯盆地东部地区天然气勘探的主要目的层，鄂尔多斯盆地东南区天然气勘探程度低，对本区山西组区域地质背景、沉积类型、沉积体系及展布特征进行分析，本区处于南北方向物源的汇集区，主要发育滨浅湖沉积和三角洲前缘亚相沉积，南北方向均发育三角洲前缘亚相沉积，其水下分流河道砂为本区主要的储集层。对本区山西组储层的岩矿特征、物性特征、孔隙特征以及影响储集性能的因素进行分析，山西组砂岩以石英砂岩为主，次为岩屑石英砂岩及岩屑砂岩，砂岩储集层为一套低孔、低渗致密砂岩储集层，沉积作用、成岩作用是影响砂岩储集性能的主要作用。

Sedimentary facies and the reservoir characteristic of the Shanxi Formation the at Southeast Area of Ordos Basin

The Shanxi Formation of Lower Permian in the eastern Ordos Basin is the main purpose stratum of gas exploration in the eastern Ordos Basin. The degree of exploration is low in southeast Ordos Basin.The paper analyses the regional geology milieu,the sedimentary type,the sedimentary system and the distribution characteristics of Shanxi Formation.This area is the collection area of the north and south Provenance,mainly grows the littoral-shallow lake facie and the delta front facies.The north and south area gr...