华北油田马西沙三段储层特征研究及评价分类

摘要

The sandstone reservoir of the 3rd member of Shahejie formation is one of the major oil and gas reservoirs in Maxi area. Its reservoir rocks are mainly fine arkose and lithic arkose. The reservoir has the characteristics of middle-low porosity and permea-bility. Based on the study of macro sedimentary characteristics, combined with technical means of sheet identification, SEM analy-sis, X-ray diffraction analysis and mercury penetration experimental analysis, this paper carried out further micro analysis on the characteristics of lithology, physical property and reservoir spaces of Maxi Sha-3 formation, classified the reservoirs and finally con-firmed that type Ⅱ and type Ⅲ reservoir were in the main positions of the study area. It is of great significance to reservoir evalua-tion and prediction of Maxi area.%沙河街组三段的砂岩储层是马西地区主要油气储层之一，其储集岩主要为细粒长石砂岩和岩屑长石砂岩，该储层具有中-低孔、中-低渗特点。在储层宏观沉积特征研究基础上，结合薄片鉴定、扫描电镜观察分析、X衍射分析、压汞实验分析等技术手段，进一步对马西沙三段储层岩性、物性、储集空间等特征进行微观分析，将储集层进行分类，从而确定研究储层以Ⅱ类、Ⅲ类储层为主，对马西地区储层评价和预测具有重要意义。