油藏底水接触关系对周期注水效果的影响评价研究

Evaluation of the influence of reservoir bottom water contact relationship on periodic waterflooding

以侏罗系浅层为主的油藏底水发育参差不齐,物性、底水能量差异大。目前,周期注水是减缓侏罗系油藏含水上升的应用比较广泛的注水政策。但由于不同底水接触关系对周期注水效果的影响探索不清,油藏无论有底水与否均实施周期注水,导致不同条件的油藏周期注水效果差异较大。以不同部位底水发育差异较大的侏罗系D油藏为例,通过对油藏南北部不同底水接触关系下的周期注水效果进行评价,系统分析与总结了适应不同底水接触关系的周期注水政策,为同类油藏周期注水提供了一定的方法与思路。

The development of bottom water in Jurassic shallow reservoirs is uneven,with significant differences in physical properties and bottom water energy.At present,cyclic water injection is a widely used water injection policy to slow down the increase in water content in Jurassic reservoirs.However,due to the unclear exploration of the impact of different bottom water contact relationships on the cyclic water injection effect,reservoirs implement cyclic water injection regardless of whether they have bottom water,resulting in significant differences in the cyclic water injection effect of reservoirs under different conditions.This article takes the Jurassic D reservoir with significant differences in bottom water development in different parts as an example,evaluates the cyclic water injection effect under different bottom water contact relationships in the north and south of the reservoir,systematically analyzes and summarizes the cyclic water injection policies that adapt to different bottom water contact relationships,and provides certain methods and ideas for cyclic water injection in similar reservoirs.