自然递减率简便求解推导及应用
A Simple Method to Calculate Natural Decline Rate
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摘要: 从理论和现场实际出发,得出了在高含水期自然递减率主要受地下含水上升幅度或含水上升率的影响,并结合水驱规律,最终导出了自然递减率的简便求解方程式。只要已知单元、区块或油田的含水率和采油速度,就可以快速求出自然递减率。预测结果与实际吻合。Abstract: Through analysis of theory and practice,it is obtainedthat natural decline rate depends mainly on water cut inhigh water-cut stage.According to law of water drive oiland derivation in math, the formula to calculate thenatural decline rate is achieved,that is to say,so long aswater cut and rate of oil production are known,it can becalculated and the result is approximate to productionpractice.