地下曲流河沉积点坝内部储层构型研究——以大港油田一区一断块Dj5井区为例

Study on reservoir's structural model inside sedimentary point bar of underground meandering river: taking well Dj-5 in block-l of zone-1 in Dagang Oilfield as a case

本文以大港油田港东开发区一区一断块为例,探索了一套在油田开发中后期密井网条件下河流相地下储层构型的研究方法。该方法综合岩心、测井、试井以及吸水剖面等静态、动态资料,以露头、现代沉积地质知识库为指导,分层次对储层进行解剖。具体步骤包括沉积微相分析、复合砂体内识别单一河道、单一河道内识别点坝、点坝内识别侧积体,最终建立研究区代表性点坝三维结构模型。

Taking the block-1 of zone-1 in Gangdong development area of Dagang Oilfield as a case,the paper probed a set of research approach of river facies underground reservoir's structural model in a condition of dense well network in mid-late stage of oilfield development. Integrating static with dynamic data such as core,logging,well test and producing data and taking outcrop and modern sedimentary geologic knowledge base as guide, the paper carried out dissection of reservoir layer by layer. The concrete steps include sedimentary micro-facies analysis, recognition of single channel in complex sand body,recognition of point bar in single channel and recognition of lateral accretional clay in point bar, finally, the 3-D structural model of representative point bar was built up in the studied area.