地质通报2016，Vol.35Issue(2)：398-405,8.
低渗透砂岩储层微观孔隙结构特征--以鄂尔多斯盆地志靖-安塞地区延长组长9油层组为例
Characteristics of microscopic pore structure in the low permeability sand- stone reservoir:A case study of Chang 9 of Yanchang Formation in Zhijing-Ansai area of Ordos Basin
摘要
Abstract
In this paper, the authors investigated characteristics of microscopic pore structure in low permeability sandstone reservoir for providing the basis for further exploration and development. By means of physical property analysis, SEM, casting slice, high pres⁃sure Hg injection, and rate-controlled Hg penetration, the authors selected low permeability sandstone samples from Chang 9 of Yan⁃chang Formation in Zhijing-Ansai area of Ordos Basin and made analysis. The information of reservoir pores, types and the morphol⁃ogy of throat and its degree of connectivity was obtained, and the quantity factors about the size of pore and throat, sorting and con⁃nectivity were determined. The results show that the pores mainly consist of residual intergranular pores, solution pores and micro⁃pores. The pore combination is divided into four types which reflect the diversity of pore structure. Pore structure of the samples is characterized by large pore and fine throat. The development of fine throat is the main reason responsible for ultra-low permeability.The diversity and heterogeneity of the reservoir pore structure is the main cause of the reservoir heterogeneity.关键词
微观孔隙结构特征/低渗透储层/延长组/志靖-安塞地区/鄂尔多斯盆地Key words
characteristics of micro-pore structure/low permeability sandstone reservoir/Yanchang Formation/Zhijing-Ansai area/Ordos Basin分类
地质学引用本文复制引用
马瑶,李文厚,刘哲,黄海鱼,杨博,许星..低渗透砂岩储层微观孔隙结构特征--以鄂尔多斯盆地志靖-安塞地区延长组长9油层组为例[J].地质通报,2016,35(2):398-405,8.基金项目
国家自然科学基金项目（批准号:41330315）、中国地质调查局项目（编号:12120114009201）和国家科技重大专项 （）
