关键词: 压汞曲线, 积分法理论, 双峰态, 非随机特征, 力学特征, 围压状态

Abstract: The integtation calculation of capillary parameter is derived theoretically.It occurs comparitive error when calculating selected at the measure point with the progression has been taken place.It is fitted well to eliminate the part high-pressure measure point.All the rock samples exist with this error.The hump distribution of intrusive response on mercury injection curve appears in the high-pressure section, whose characteristics are the variable slope of capillary pore diameter curve, which is different from the monotonous slope of the cast thin section and centrifugal method.The mono increasing for the pressure and nonrandom property shows to be of non-factor for pore configuration.The relations between the initial poing of double hump distribution of intrusive and the permeability is belong to mechanics property.Now that the saturation does not change when the pressure changes at the maximum in the mercury injection curve part that is the man-made result.The original mercury injection curve is very similar to the curve of rock stress.The rock sample is under confining pressure state when mercury injected measure occurs.The original mercury injection curve appears not only with the double hump distribution of intrusive, but also "the eagle-mouth model" at the maximum pressure.This is the result of the different medium with or without mercury, when filling the fluids into porous body of rocks.The integral method can reduce the measure points, raise the work efficiency, shorten the working time, be help for the health, prolong the life of instruments.

Key words: mercury injection curve, integral theory, double hump distribution of intrusive, non-random property, mechanics property confining pressure state “eagle-mouth model”