Correlation for Prediction and Estimation of Capillary Pressure to Account for Wettability and Wettability Variations Within Reservoir—Part 2

Wettability plays an influential role in fluid flow behavior within a reservoir. Despite of its importance, it is not usually given the required significance during simulation studies. Different types of wettability may exist or co-exist within a reservoir which may change with the passage of time, depending on the prevailing conditions within a reservoir and also on the fluids which are injected for the purpose of enhanced oil recovery. In order to account for the effect of such wettabiliy variations on fluid flow behavior, a set of correlations have been developed to estimate capillary pressure, when the data from the core at extremely water-wet conditions is known. In this paper the developed set of correlations are further modified, so that they can be used quite effectively, when the capillary pressure data for any wettability conditions is known.