METHOD OF AVERAGING CAPILLARY PRESSURE CURVES.

Capillary pressure data can be useful to calculate reservoir saturations provided a realistic average capillary pressure curve can be derived for a particular rock type. Since capillary pressure characteristics are known to vary with porosity (or permeability), a mathematical procedure is developed whereby the resulting average curve is a single relationship dependent on that parameter. This average curve is especially useful in evaluating low porosity carbonate reservoirs as well as providing a basis for generating one or more representative capillary pressure curves for reservoir simulation.