论文部分内容阅读
苏西W区块位于鄂尔多斯盆地伊陕斜坡西北部。主要从有效砂体的厚度比例、单砂体分布规模、有效砂体平面展布特征三个面认识该区盒_8、山_1、山_2段的有效砂体展布规律;并从岩石学特征、物性特征、孔隙组合类型和孔隙结构等方面揭示该区的储层特征。研究认为:盒_8下亚段和山1段有效砂体在全区大面积分布,连续性较好;山_2段有效砂体分布范围广,但整体厚度较小;盒_8上亚段有效砂体欠发育。盒_8、山_1、山_2段储层均属于特低孔超低渗储层;“溶孔+微孔型”孔隙组合在研究区最为常见,其次是“溶孔+微孔+粒间孔型”孔隙组合;储层孔隙结构具有“大孔隙、小喉道、孔喉连通性差”的特点。
The block Wusi W is located in the northwestern part of the Yi-Shan slope in Ordos Basin. Mainly from three aspects of the effective sand body thickness ratio, the single sand body distribution scale and the effective sand body plane distribution characteristics, we can know the effective distribution of sand body in the box, Petrology, petrology, petrophysics, physical properties, pore assemblages and pore structure. The study shows that the effective sand bodies in the lower section of Box 8 and section 1 of the box are distributed widely and have a good continuity in the whole area. The range of the effective sand body in Section 2 is wide but the overall thickness is small. Box 8: Segment sand body less effective development. The reservoirs of Box 8, Hill_1 and Hill_2 all belonged to ultra-low permeability ultra-low permeability reservoirs. The pore combination of “solution pore + micropore type” was the most common in the study area, followed by “pore + Micropore + intergranular pore type ”pore combination; reservoir pore structure with “ macropores, small throat, pore and throat connectivity is poor ”features.