绥靖油田杨19区延91油藏流动单元划分合理性研究

摘要

目前多数的流动单元划分只考虑了岩性、物性等静态参数，划分结果与生产实际有偏差，并且流动单元验证方法较单一。为了提出更加合理的流动单元划分，针对绥靖油田杨19区延安组延91油藏的开发现状和所收集的相关数据，本次延91储层流动单元的划分选取5组静态参数和3组动态参数，以期对其进行更加精准的流动单元划分。通过运用Q型分层聚类分析法对各参数进行了分析，得出A，B，C，D四类流动单元。本次合理性验证主要运用判别分析得出了其结果的正判率为99.3％，并从渗流特征、非均质性、空间位置相关性3个方面进行了验证，改进了流动单元的验证方法。划分结果表明各流动单元的物性特征和生产动态有较好的对应关系，说明流动单元的划分是合理的。研究表明延91小层的流动单元类型以B类流动单元为主，A和B类流动单元应是未来剩余油挖潜的重点。%Currently,most of the flow unit divisions are only based on such static parameters as lithology and physical property,which make the division results deviate from the actual production practices.Besides,the verification method of the flow unit is single.In order to put forward a more reasonable division method of flow units,Yan 91 oil reservoir in Yang 19 block of Suijing Oilfield was taken as an example.Five groups of static parameters and three groups of dynamic parameters were selected to divide the flow unit of Yan 91 reservoir more accurately.By applying the Q type hierarchical clustering analysis method to each parameter,the reservoir can be divided into four types of flow unit including type A, type B,type C and type D.And the hit ratio of the result from discriminant analysis is 99.3%.The rationality of the re-sults was demonstrated in respects of seepage characteristics,heterogeneity and spatial correlation,improving the verifica-tion method of the flow unit.The division results show that the physical characteristics correlate well with dynamic pro-ductions of each flow unit,indicating the rationality of the division of flow unit.The research shows that the flow units of Yan 91 reservoir are dominated by type B.The type A and type B units may be the emphasis of residual oil development.