Method for oil and water relative permeability calculating in Western Siberia formations according to capillarimetric and geophysical data

Abstract

The most important filtration characteristics of productive formations are the oil and water phase and relative permeability. Methods for obtaining relative phase permeabilities can be divided into laboratory and analytical. Currently, the main source of information about RFP are techniques based on laboratory core studies. However, for each productive reservoir, it is desirable to have analytical models describing experimental data on RFP with an accuracy sufficient for practical purposes. The existence of such models will make it possible to increase the accuracy of development computer modeling. The analytical expressions obtained in this study allow us to take into account the influence of the pore channels heterogeneity in size on the relative phase permeabilities magnitude. It is shown that the pore channels heterogeneity in size can be estimated by the residual water saturation amount, which in turn can be determined from the geophysical well studies. Keywords: relative permeability; residual water saturation; pore channels; capillarimetric and geophysical studies.