DIGITAL CORE ANALYSIS OF CAPILLARY PRESSURE IN SANDSTONE

Abstract

This research aimed to obtain the petrophysical parameters of the capillary pressure in a sandstone from 3D modelling of high-resolution images. By integrating a number of 2D slice results, a plot of capillary pressure vs water saturation was built. When
performing digital simulations using 512 x 512 x 512 pixels, the effect on the resulting image was clearly seen using adaptive thresholding. The obtained porosity was 29.5% while the permeability was obtained through iteration was 3942 mD. This quite
large value is because the synthetic core was made from coarse sand grains. It was found that at the depth of free water level of 984 ft, the obtained capillary pressure is 167.36 psi with water saturation at 4%.