A study of two-phase, non-Darcy gas flow through proppant pacs

Through a systematic experimental study it is found that the effect of liqu id phase on non-Darcy gas flow through proppant packs cannot be characteriz ed by Forchheimer correlation alone. An empirical equation that uses liquid -to-gas ratio to predict the effective permeability or conductivity of a pr oppant pack under two-phase, non-Darcy flow conditions is proposed in the p aper. The effective permeability of a proppant pack at different conditions can then be calculated taking both non-Darcy and two-phase flow effect int o account. A simplified physical model is developed to calculate a mobile l iquid saturation at mio-phase flow conditions.