一种用于水驱开发效果评价的新方法

针对目前利用流管法建立水驱效果评价理论曲线存在的问题 ,建立了一套新的评价水驱开发效果的典型曲线。首先 ,根据相关经验公式确定区块的水驱采收率 ;再利用童氏校正水驱曲线 ,建立起含水率与采出程度的关系 ,在此基础上推导出了存水率随采出程度的变化关系式 ;最后建立了含水率采出程度和存水率采出程度的典型曲线。根据区块实际的含水率采出程度和存水率采出程度曲线与典型曲线的位置关系 ,就可以评价区块目前的水驱开发效果。实例应用结果表明 ,该方法简单可行 ,可用于矿场水驱开发效果的评价

A new method for evaluating waterflooding development effectiveness

There are some defaults on the theoretical curves based on the stream tube method for evaluating waterflooding development effectiveness. A new set of typical curves were proposed to evaluate waterflooding development effectiveness. The ultimate recovery factor can be determined by means of relevant empirical equations. On the basis of the correlative equation between water cut and recovery percentage derived from Tong's waterflooding curve, the correlative equation between net injection and recovery percentage was derived, and some typical correlation curves of water cut with recovery percentage of reserves and the net injection with recovery percentage of reserves were given. The effectiveness of waterflooding development can be evaluated by means of the correlation between actual curves and the typical curves. The applied results show that this method is simple and reasonable for evaluating the waterflooding development effectiveness of oil field.