周期注水提高水驱效率技术研究

Cyclic water injection improves displacement efficiency

周期注水技术主要是通过油水交渗效应、毛管压力作用 ,增加注水波及体积 ,从而提高水驱采收率的技术。文中阐述了该技术的作用机理 ,并对影响周期注水开发效果的因素进行了分析 ,结果表明 :增加油水交渗量、稳压时间以及水的滞留系数 ,可以使周期注水的效果更加显著。该技术适用于亲水以及亲油油藏 。

Cyclic water injection increases swept volume through oil-water percolation effect and capillary pressure effect to improve water drive recovery factor. This paper expounds the working mechanism of this technology and analyzes the factors influencing cyclic water flooding. The result shows that cyclic water injection may be more effective if increasing oil-water percolation rate, standup pressure time and water holdup coefficient. This technology is suitable to water-wet and oil-wet reservoirs, with water-wet reservoirs being more preferable.