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常数百分递减被广泛用于预测油、气井或油、气藏的未来动态和最终累计产量。文中分别描述了两种常数百分递减率——名义递减率和有效递减率,并推导出相应的产量、累计产量计算公式及两种递减率的关系式。
The constant percentage decrease is widely used to predict the future dynamics of oil and gas wells or oil and gas reservoirs and eventually the cumulative production. Two types of constant percent reduction - nominal rate of decline and effective rate of decline are described respectively, and the corresponding formulas of yield, cumulative production and two kinds of rates of decline are deduced.