特低孔渗储集层孔喉参数的计算

以实验资料为依据,提出了在压汞法测定毛管压力时,对孔喉直径均值等参数计算中存在的问题,并从理论上论证了问题的结症在于计算过程中所采用的单位不一致和对公式中分母中常数100的理解不一样,并忽略了测不出的微孔喉。通过实例计算指出应用φ值和最大进汞量进行计算是解决问题的合理方法。

On Pore Throat Parameters Calculation of Extra-Low Porosity and Extra-Low Permeability Reservoir

Based on experimental data, this paper presents ex isting problems of parameters calculation for diameter average values of pore and throat and others, when determining the capillary pressure by mercury injection. It is demon-strated that w here the trouble lies are: adopting units for calculation without unitarity, disagreed understanding for the constant 100 of denominator used in formula and that the micro pore and throat that cannot be measured are neglected. Through caleulation of example, reasonable method for solution of such problems using φ value and maximum mercury injection rate is pointed out to conduct the relat ed calculations.