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在试井解释中,压力导数方法弥补了过去传统解释方法的不足,提高了解释结果的准确性和唯一性。但对于矿场实测压力数据,采用不同的数值求导方法,所得到的压力导数的精度也不同,对其解释结果有直接的影响。本文根据文献[1]、[2]介绍了这种方法的来源及在试井解释中的应用过程,并构造了压力随时间变化的插值函数,给出了时间步长不等的4点压力数值求导计算公式。本文还有应用实例2则。
In well test interpretation, the pressure derivative method makes up for the deficiencies of the traditional methods of interpretation in the past and improves the accuracy and uniqueness of interpretation results. However, for the measured pressure data of the mine, different numerical derivation methods are adopted, and the accuracy of the pressure derivatives obtained is also different, which has a direct impact on the interpretation results. This paper introduces the source of this method and its application in well test interpretation according to [1] and [2], and constructs the interpolation function of pressure with time. It gives 4 pressure points with different time steps Numerical derivation calculation formula. This article also has application example 2.