Relative-Permeability Measurements: An Overview

Abstract

Significant advances have been made in methods for accurate measurements of saturations and fluid distributions. Further research is needed to reduce (or properly account for) capillary end effects, to control hysteresis, and to minimize wettability changes involved in flow experiments. Studies are needed on modeling complex displacements in reservoirs with flow tests performed at idealized laboratory conditions. Similarly, improvements in interpretation of laboratory data and in scaling up for field use are still required. Until additional advances in technology are made, the best course of action is to generate both steady- and unsteady-state laboratory data, under simulated reservoir conditions, on carefully selected and preserved cores.