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由于很多油田用乙型曲线预测水驱可采储量的相对误差大于用甲型曲线预测的相对误差,因此,普遍选用甲型曲线的预测结果.通过对甲型、乙型曲线表达式的推导和储量计算公式的对比可知,用乙型曲线预测储量结果是甲型曲线预测结果的最高极限,用甲型曲线预测的可采储量值小于用乙型曲线的预测值.油田实例还表明,也存在用乙型曲线预测误差小于用甲型曲线预测误差的现象,而且,即使选用相同数据点,2者预测值也可能相差较大.因此,用2种曲线预测储量不同的原因在于它们的表达式不能严密地互相推导,忽略常数C造成的.2者对制定油田生产规划都有一定的参考价值.
Because the relative errors of predicting water recoverable reserves by type B curve in many oil fields are larger than the relative errors predicted by type A curves, the prediction results of type A curves are generally used.By deducing the expression of type A and B curves and Comparing the formula of reserves, it can be known that the predicted result of reserve B is the maximum limit of the predicted value of type A curve, and the recoverable reserve value predicted by type A curve is smaller than the predicted value of type B. Curve also shows that there are also The prediction error of type B curve is smaller than that of curve type A curve prediction, and even if the same data point is selected, the two predicted values may differ greatly, so the reason why the two kinds of curves predict different reserves lies in their expressions Can not be closely deduced from each other, ignoring the constant C caused by .2 who have a certain reference value in the development of oilfield production planning.