【摘要】 为了明确白北凹陷腾格尔组储层特征和分布规律,指导下一步勘探工作。通过白北凹陷6口探井的岩心观察,薄片鉴定、扫描电镜、储层物性等研究,分析了腾格尔组储层岩电特征、物性特征、平面物性特征,并利用测井曲线结合地震资料进行了测井约束反演,研究预测腾格尔组储层分布规律。结果表明:白北凹陷腾格尔组储层的岩石类型以砾岩、砂岩、泥质粉砂岩和灰岩为主,砂岩孔隙类型为粒间孔隙、溶蚀孔隙,储层非均质性很强,为特低孔特低渗-超低孔超低渗储层。储层渗透率的变化主要受相带的影响,孔隙度相对较大的区带主要分布在SC1井东西两侧以及YM4井东部。研究认为在南部斜坡带发育3套储层;在北部西佰分支断层下降盘根部发育2套储层;在西佰断层下降盘根部发育3套储层。更多还原

【Abstract】 In order to clarify the reservoir characteristics and distribution law of Tengger Formation in Baibei Sag and guide the next exploration work. Based on core observation,thin section identification,scanning electron microscopy and reservoir physical properties research of six exploration wells in Baibei Sag,the lithoelectric characteristics,physical characteristics and plane physical characteristics of Tengger Formation reservoir were analyzed,and logging constrained inversion was carried out by using logging curves and seismic data to study and predict the reservoir distribution law of Tengger Formation. The results show that the reservoir rock types of Tengger Formation in Baibei Sag are mainly conglomerate,sandstone,argillaceous siltstone and limestone. The sandstone pore types are intergranular pore and dissolution pore. The reservoir heterogeneity is very strong,and it is a very low porosity,ultra-low permeability and ultra-low porosity reservoir. The change of reservoir permeability is mainly influenced by facies zones. The zones with relatively large porosity are mainly distributed in the East and west sides of SC1 well and in the east of YM4 well. It is considered that there are developed three sets of reservoirs in the southern slope zone,two sets of reservoirs in the roots of the descending pan of the Xibai branch fault in the north and three sets of reservoirs in the roots of the descending pan of the Xibai fault.更多还原