复合曲流砂体中单一点坝精细描述方法研究

The fine description of single point bar in composite sand body of meandering rivers

曲流河点坝砂体是当前剩余油的主要储集空间,因此从大面积叠加连片分布的复合砂体中对其进行准确识别和描述对于剩余油精细挖潜至关重要。为实现这一目标,本文以沾化凹陷A区块M小层为实例,采用层次分析方法,根据砂体成因类型及其空间配置关系,首先从剖面上识别出了单一曲流河道砂体,随后又根据点坝砂体正韵律特征以及废弃河道平面和剖面上的展布识别了出了各个单一点坝砂体,实现了对复合曲流砂体中点坝的精细描述。

Point bar sand body of meandering rivers are major reservoir space of remaining oil. It is very important to recognize and describe point bar from thick composite sand. To achieve this goal,we take the M small layer of A working area of Zhanhua sag for example,using analytic hierarchy process methods,first of all,we recognize the single channel sand body based on the spatial arrangement and genetic types of sand body,then the single point bar was determined through the positive rhythm of point bar and the distribution of abondoned channels.