河道砂油藏调驱效果评价

Evaluation of Profile Control and Flooding Effect in Streamway Sand Reservoir

X油田河道砂油藏由于非均质性强、中间物性好、边部物性差的特征,导致注入水易延高渗条带突破,部分油井已经进入中高含水阶段,注入水利用率下降,水驱效果变差。以X油田Y区块河道砂油藏为研究对象,优选调驱体系,开展现场实验,增油效果显著,从而形成一套适合河道砂油藏在中高含水期的调驱技术,为提高采收率做好技术支持。同时建立一套调驱评价体系,为调驱效果评价提供了理论支撑。

The streamway sand reservoir in X Oilfield is characterized by strong heterogeneity,good intermediate physical properties,and poor edge physical properties,as a result,the injected water is prone to break through high permeability zones,and some oil wells have entered the stage of medium to high water content,utilization rate of the injection water decreases,and the water drive effect deteriorates.This paper takes the streamway sand reservoir in Block Y of X Oilfield as the research object,optimizing the profile control and flooding system and conducting on-site experiments,which has an obvious effect,forming a set of profile control and flooding technologies suitable for river sand reservoirs in the medium to high water cut stage,providing technical support for improving oil recovery.At the same time,a set of evaluation system for profile control and flooding is established,providing theoretical support for the evaluation of profile control and flooding effects.