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根据示功图，先估算出产液量ＱＬ的初值。然后，计算出油管内流体的压力分布及密度分布。采用文中的方法求得计算值ＱＬ＇，若ＱＬ＇与ＱＬ相比小于所给的精度，则即为计算产液量，否则用代替ＱＬ，重新计算。结果表明，最大相对误差为１９．５８％，最小相对误差为１．３３％，相对误差在１５％以内的井占９０％。
According to the power diagram, the first estimate of the initial value of the liquid volume QL. Then, calculate the pressure distribution and density distribution of the fluid in the tubing. Calculated using the method of calculating the value of QL ’, if QL’ and QL less than the given accuracy, then the amount of liquid production is calculated, otherwise replace QL, recalculated. The results show that the maximum relative error is 19.58%, the minimum relative error is 1.33% and the relative error is less than 15%, accounting for 90%.