非均质油藏水平井调剖注入压力和注入量预测方法的建立与应用

Establish and application of prediction method of injection pressure and injection volume for profile control in horizontal wells of heterogeneous oil reservoirs

针对注入凝胶前后水平井注入参数的沿程分布问题,运用叠加原理与镜像反应原理,并考虑井筒摩阻的影响,建立了预测调剖前后注入压力与注水量沿程分布的解析方法,分析了凝胶对注入参数的影响。用此方法模拟预测了均质条件下和非均质条件下水平井注凝胶调剖前后注水量与注入压力的分布规律,为优化水平井调剖工艺参数、提高措施效果提供了保障。

Aiming at the distribution along path problem of horizontal well injection parameters before and after gel injection profile control,an analytical method for predicting the distribution along path of injection pressure and water injection amount is established through applying the superposition principle and mirror reflection principle,and considering the influence of shaft friction.The effect of gel on the injection parameters is analyzed.This method is used to predict the distribution rule of water injection volume and injection pressure before and after gel injection profile control under homogeneous and heterogeneous conditions,which provides a guarantee for optimizing the profile control process parameters of horizontal wells and improving the effect of measures.