INFLUENCE OF CAPILLARY FORCES ON GENERATION OF THE INVADED ZONE
The results of the theoretical investigation of the influence of capillary forces on generation of the invaded zone while drilling the borehole with using a water-base clay drilling mud have been given. The influence of the capillary forces has been estimated for different values of fluid viscosity ratios, initial overpressures, mudcake permeabilities and absolute permeabilities of the formation. Using a Dakhnov-Archie type relationship, we have demonstrated the influence of the capillary forces on the dynamics of the electrical resistivity profile.