注水井劈分系数计算新方法研究

A New Method of Dividing Coefficient Calculation for Water Injection Well

如何实现注水井的科学、合理配注是注水开发油藏面临的一个难题。为了更精确地了解油水井在地下的注采关系,最重要的是确定注水井到生产井间的水量劈分情况。通过对以往劈分系数的研究及对所选井组中注采井的压力分析,根据压力波的前缘确定水驱前缘位置,并建立一种新的计算水井到油井间的劈分系数方法。该方法计算简便,能合理地计算出相连生产井的劈分注水量,为注水井配注提供理论依据。

How to realize the reasonable injection allocation of water injection well is a difficult problem.In order to precisely determine the injection and production relationship between the oil-water wells in the underground,the key is to establish the dividing coefficient for water volumes from water-injection well to development well.Through the study on the former dividing coefficient and the well group pressure analysis for injection and production wells,this paper establishes one kind of new calculation method of dividing coefficient between the water well to the oil well,which is based on the water drive position defined by pressure wave front.This method is simple in calculation and can reasonably calculate the dividing water injection rate,which can provide the theory basis for injection well allocation.