濮城油田沙河街组二段剩余油的分布

DISTRIBUTION OF REMAINING OIL IN SHA-2 MEMBER OF PUCHENG OILFIELD

濮城油田东区沙河街组二段为多油层非均质层状油藏 ,现已进入高含水开发期 ,其剩余油储量为 396×10 4 t,主要集中在断层附近、构造高部位及复杂断块区。微构造和储层性质是影响剩余油分布的主要因素 ,正向微构造和小断层遮挡所形成的微型屋脊式构造是剩余油集中的部位 ;非均质性严重、渗透率低的流动单元其剩余油饱和度高。另外 ,注采系统亦对剩余油的分布有一定影响 ,注采井距加大 。

The oil pool of Sha 2 member in the east part of Pucheng Oilfield is a multi layer heterogenous bedded oil pool,and has entered into high aquiferous exploration stage.The remaining reserve of the pool is 396×10 4 t,mainly distributed near faults,in the higher parts of structures and complicated fault blocks.Micro structures and reservoir property are the basic factors influencing the distribution of remaining oil;normal micro structures and micro roof type structures are the positions for oil enrichment;the fluid flow unit with lower permeablity has higher remaining oil saturation.Besides,the saturation increases with the increasing of waterflood well spaces.