岩石毛细管压力曲线特征参数的确定及应用

根据确定的含油气岩石孔喉半径下限的认识，岩石中大于含油气岩石孔喉半径下限的孔喉体积才有储集油气的可能，而小于岩石孔喉半径下限的孔喉体积不能储集油气．由岩石毛细管压力曲线确定的含气岩石中大于0．075μm孔喉体积百分数这个参数，能够在储集岩评价、孔隙度下限确定、束缚水饱和度确定等方面提供重要依据．．

Rock Capillary Pressure Curve Characteristics of Parameters and its Application

According to the knowledge about floor of pore radius of rocks containing oil and gas, it is only possible that reservoir pore and throat volumes with pore and throat size limit greater than floor of rocks＇ pore radius can hold oil and gas, while pore and throat volumes lower than the floor can not store oil and gas. The parameter determined by capillaly pressure curve is a percentage of pore and throat volumes composed by pore and throat size limit, which is greater than 0.075 Ixm in gas rock, which has provid- ed great evidence to evaluate the reservoir rock, determine the floor of porosity and predict the irreducible water saturation.