胜利油田王家岗地区下第三系沙四段砂岩储集层类型及分布

根据岩性和电性特征 ,对胜利油田王家岗地区下第三系沙四段砂岩储集层的类型及分布进行了研究。研究结果表明 ,王家岗地区沙四段自上而下可划分为 4个砂层组和蓝灰段 ,其中第三和第四砂层组为主要砂岩储集层发育段。根据地质、地震和测井相资料 ,又将第三砂层组划分为 7种沉积微相 ;第四砂层组划分为 6种沉积微相。研究还表明 ,该地区的砂岩储集层分为中孔中渗、中孔低渗和低孔低渗 3种储集层类型 ,其中以低孔低渗储集层为主 ,其储集层物性主要受沉积相类型和成岩作用所控制

Type and distribution of sandstone reservoir of fourth member in Shahejie formation of palaeogene in Wangjiagang area of Shengli oilfield

Based on the lithologic features and electric property, the type and distribution of the sandstone reservoir of the fourth member in Shahejie formation of Palaeogene in Wangjiagang area of Shengli oilfield were studied. The sandstone reservoir of the fourth member in Shahejie formation can be divided into four types of sand beds and one kind of blue grey bed from top to bottom. The third and fourth sand beds of the strata are the main developed sections of sandstone reservoirs. According to the geological, seismic and logging data, the third sand bed was divided into seven sedimentary microfacies, and the fourth sand bed was divided into six sedimentary microfacies. The sandstone reservoirs of this area can be classified into three types, including the middle porosity and middle permeability, the middle porosity and low permeability, the low porosity and low permeability. The most reservoirs belong to the third type. The types of sedimentary facies and diagenesis controlled the physical properties of the reserviors.