双重介质储层压裂过程中由于储层天然裂缝在缝内净压力作用下的扩展和开启 ,净压力的变化对滤失系数的影响较大。受压力变化的影响 ,用Notle方法计算压裂液效率、滤失系数和裂缝几何尺寸存在较大误差 ,甚至会得到截然相反的结论。本文在修正传统Nolte方法的基础上 ,提出了与压力有关的滤失判定方法。 Due to the expansion and opening of the reservoir natural fractures caused by the net pressure in the fracture during the double medium reservoir fracturing, the change of the net pressure has a great influence on the filtration coefficient. Affected by the pressure change, the Notle method is used to calculate the efficiency of fracturing fluid, and there is a big error in the filtration coefficient and fracture geometry, and even the opposite conclusion can be obtained. Based on the modification of the traditional Nolte method, this paper puts forward a pressure-dependent method for determining the fluid loss.