The choice of the correlating function of capillary pressure curves under conditions of reservoirs in Western Siberia

The article considers the approximation of capillary pressure curves of productive formations in Western Siberia. The relationship between the correlating functions of capillary pressure curves is shown: the Leverett J-function and the Brooks-Corey function. In this case, the Brooks-Corey function is the same Leverett function but used for water saturation of the effective part of the void space (reduced water saturation). The authors recommend choosing a correlation function for a given reservoir, depending on the tightness of the correlation between capillary pressure and volumetric or reduced water saturation. In this case, the Leverett function should be preferred, since it depends only on two parameters (permeability and porosity).