昆北油田切六区路乐河组储层连通性研究

Reservoir Connectivity in the Lulehe Formation of the Qie-6 Block of Kunbei Oilfield

以测井、储层物性、三维地质模型的渗透率属性资料以及实际注采资料为基础,分别从储层的测井曲线特征、储层构型特征、注采信息3个方面对昆北油田切六区路乐河组的储层连通性进行了研究。研究结果表明:两井测井曲线呈箱型,井间储层连通性较好;测井曲线呈指状,连通性变化较大;测井曲线呈钟型,下部连通性较好,上部较差;测井曲线呈漏斗型,上部连通性较好,下部较差;测井曲线呈齿型,连通性较差;两口井曲线特征差异较大,储层连通性较差;自然电位明显负异常及自然伽马值较低时,曲线越光滑则连通性越好。水下分流河道和河口坝单一构型单元连通性较好,席状砂构型单元连通性有好有差,其他构型单元连通性较差;水下分流河道与河口坝、水下分流河道与席状砂复合构型单元连通性较好,其他复合构型单元连通性较差;加积型叠置的构型单元连通性较好,其他叠置类型的构型单元连通性较差。产液井的产液量增长比例越大,表明其与注水井井间储层的连通性越好。

Based on logging,reservoir physical property,the permeability attribute of 3Dgeological model and injection-production data,this paper studied the reservoir connectivity in the Lulehe Formation of Qie-6block of Kunbei Oilfield from three aspects-logging curve characteristics of reservoir,features of reservoir architecture and injection-production information.The result shows that：Logging curves are boxshaped between the two wells and represent good reservoir connectivity between the two wells;while the finger-shaped logging curves represent the connectivity is changeable;bell-shaped representing the connectivity underside of the reservoir is good and the upper is poor;funnel-shaped representing the upper is good and the underside is poor.The tooth-shaped logging curves represent poor connectivity and when different electrical characteristics are found between the two wells,reservoir connectivity is poor,but when natural potential negative anomally is obviously and natural gamma is low,the curve is smoother,and the connectivity is better.Underwater distributary channel and mouth bar single architecture element have better connectivity,while sheet sand architecture element connectivity is either good or poor,and other architecture element is poor;underwater distributary channel and mouth bar,underwater distributary channel and sheet sand composite architecture element is good,other composites are poor;aggradation-stacked is good,other types are poor.Liquids production up the greater,reservoir connectivity is better between injection and production wells.