A Comparison Between Capillary Pressure Data and Saturation Exponent Obtained at Ambient Conditions and at Reservoir Conditions

Abstract

Summary The porous plate method was used to determine capillary pressure curves and saturation exponents at ambient conditions and at full reservoir conditions (reservoir pressure, temperature, and fluid) on sandstone core plugs from a North Sea reservoir. The main objective of this study is to determine whether any difference exists between the capillary pressure curves and the saturation exponents obtained at ambient conditions and those obtained at reservoir conditions for a North Sea reservoir. Results show that the capillary pressure and electrical resistivity measurements performed at ambient conditions with nonreservoir fluid displacing water can give results different from measurements performed at conditions prevailing in the reservoir.