Actual example illustrates the applied method of pressure derivative curve rule.
通过实例说明了压力导数曲线准则的应用方法。
According to the semi-logarithmic curve, pressure derivative curves of vugs initially increase and then decrease;
绘制出了溶洞压力导数半对数曲线和井底压力双对数曲线。
The first and second derivative plates of concave pressure build-up curve are presented in this paper.
本文提出了凹型压力恢复曲线的一阶导数图版和二阶导数图版。
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