水驱油藏评价

Evaluation of water flooding in reservoirs

在我国,部分油藏具有充足的天然水体,利用边水、底水进行天然水驱开发。但大多数油藏边底水能量不足,需人工注水补充天然能量进行水驱开发,那么如何评价水驱开采效果,本文针对这一问题进行了研究。主要得出以下结论:(1)水驱油藏评价的主要指标为注采井网的合理性评价、含水率与采出程度关系、自然递减率、含水上升率、注水利用率等;(2)采用注采比法来确定水井合理注入量,该方法具有计算简单、适用性强的优点。

Some reservoirs in China have sufficient natural waters and they can apply edge and bottom water to natural waterflooding development. But the edge and bottom water in most reservoirs is short of energy and need manpower to replenish water(natural energy)for water flooding development. The way to evaluate the water flooding effect in reservoirs is researched in thispaper. The conclusions are as follows:(1)the main indexes for water flooding reservoir evaluation are reasonable evaluation oninjection and production wells network,relation between water content and recovery percent,natural decline rate,water cutincreasing rate,water injection utilization rate,an so on;(2)Injection-production rate method with wide applicability and easyto calculate is employed to determine the reasonable water injection amount to water wells.