鄂尔多斯盆地东缘临兴中区致密砂岩有效储层物性下限分析

Study on the Lower Effective Limit of Porosity and Permeability of Tight Gas Reservoir in Linxing Middle Block, Eastern Margin of Ordos Basin

摘要: 为了获得鄂尔多斯盆地东缘临兴中区石盒子组致密砂岩有效储层物性下限，本文通过薄片鉴定、岩心测试、测井解释、压裂试气等数据，分析了储层岩性特征、产能特征以及物性下限。结果表明：上石盒子组压裂产能孔隙度下限为7%，下石盒子组压裂产能孔隙度下限为6.5%，压裂产能渗透率下限为0.2 mD。本次研究明确了有效储层的参数标准，为储层压裂改造提供了理论支撑，有助于提高压裂成功率，获得更高工业产能。

Abstract: In order to obtain the lower effective limit of porosity and permeability of the tight sandstone reservoir of the Shihezi Formation, the central Linxing area of the Ordos Basin, this paper analyzes the lithological characteristics, productivity characteristics, and lower limits of physical properties of tight gas reservoir through data, such as thin slice identification, core testing, well logging interpretation, and fracturing gas testing. The results show that the lower limit of fracturing productivity porosity in the upper Shihezi Formation is 7%, and in the lower Shihezi Formation is 6.5%. The lower limit of fracturing productivity permeability is 0.2 mD. This study clarified the parameter standards of effective reservoirs, provided theoretical support for reservoir fracturing reformation, and helped to increase the success rate of fracturing and obtain higher industrial production capacity.