Evaluation of Three Phase Relative Permeability Models for Simulating Immiscible WAG Injection in Carbonate Rocks

Abstract

Three phase relative permeability models are used widely by reservoir engineers to investigate the performance of petroleum reservoirs, in particular, for designing gas injection strategy or WAG injection projects. However, there are concerns about the validity of the existing models and the reliability of predictions made by these models. In this paper, we have assessed the performance of some of these models for WAG injection in carbonate rocks by comparing the prediction of the models with the results of coreflood experiments performed under reservoir temperature and pressure. Two phase relative permeability results were obtain from history matching the experimental data by using our in-house history matching software. The estimated gas/oil and water/oil relative permeability curves were then used to simulate the results of immiscible gas and water injection under different injection strategies using different three-phase kr models. The results of these simulations were compared with experimental results.