准噶尔盆地二叠系梧桐沟组东泉-西泉地区储层物性特征及其影响因素

Characteristics of Reservoir Physical Properties and Influencing Factors in Dongquan-Xiquan Area of Permian Wutonggou Formation in Junggar Basin

通过对研究区取芯井的分析化验资料进行储层岩石学特征统计分析及对比,东泉-西泉地区都以岩屑砂岩为主,其次为长石岩屑砂岩。运用扫描电镜、铸体薄片、压汞等技术手段对储层进行精细微观结构分析,包括孔隙类型、孔隙结构等,分别对比储层物性特征及其主要影响因素,西泉地区孔隙度、渗透率较优于东泉地区,为相对优质储层。

Petrological characteristics of the reservoirs were analyzed and compared by comparing the analytical data of the core wells in the study area, Dongquan-Xiquan reservoir is mainly composed of lithic sandstone, followed by feldspar lithic sandstone. Microstructures of the target reservoir including pore types, pore structures were analyzed by means of scanning electron microscopy, cast sheet and mercury intrusion. Compared the reservoir properties and their main influencing factors. Xiquan area is a high quality reservoir, and its porosity and permeability are better than Dongquan area.