本文根据双重介质地层渗流方程的精确解,给出了在有界定压,有界封闭和无限大三种边界条件下裂缝系统中压力导数的理论表达式及理论曲线。压力导数能较深刻地阐明非均质地层压力反应的某些特性,而这些特性在单独分析压力时是无法发现的。在实际应用方面,根据压力导数理论给出了双重介质地层试井分析的微分方法;压力和压力导数样板曲线图。 Based on the exact solution of the seepage equation of the double media, this paper presents the theoretical expression and theoretical curve of the pressure derivative in the fracture system under the boundary conditions of bounded pressure, bounded block and infinity. Pressure derivatives can be more profound elucidation of some of the characteristics of heterogeneous formation pressure response, and these characteristics can not be found in the separate analysis of the pressure. In practical application, according to the pressure derivative theory, a differential method for well test analysis of double media strata is given; and a plot of pressure and pressure derivative models is given.