常规油藏多层合采层间干扰系数确定新方法

多层合采层间干扰系数是确定多层合采组合界限以及评价产能一项重要的参数,然而在实际油田编制开发方案过程中,很难获得求取层间干扰系数所需各项参数,从而很难获得较准确的层间干扰系数,取而代之的是采用经验值,这给多层合采界限的确定与产能评价带来一定的不确定性。提出利用单层DST测试数据、油田生产动态数据、生产井压力恢复试井解释结果、实验室原油高压物性及岩心分析结果等资料,对多层合采层间干扰系数进行计算,并介绍了计算方法。经实际资料验证,该方法具有较好的实用性,且简单易行。

New determination method of interlayer interference coefficient among commingling production layers in conventional reservoirs

Interlayer interference coefficient is an very important parameter to confirm the limits of layer series combination and productivity evaluation.However,interlayer interference coefficient is difficult to decide because the parameter used for calculating it is hard to acquire.Then interlayer interference coefficient empirical value is usually used and some uncertainty is involved.This paper proposed using reservoir engineering method to calculate interlayer interference coefficient with DST test data,dynamic performance data,pressure buildup test interpretation results,PVT and core analysis results,and so on,when there is not interlayer interference well testing.The results of the oilfield application proved the method has good practicability and is easy to use.