Portal de Periódicos da CAPES

Three-Phase Relative Permeability of Water-Wet Berea

1990; Linguagem: Inglês

10.2118/20183-ms

Min-Ae Oak,

NMR spectroscopy and applications

Abstract Two-phase and three-phase relative permeabilities of water-wet Berea sandstone have been studied exper-imentally. Eight cases of saturation history have been investigated. About 1800 data have been collected using the steady-state method: about half of them for two-phase flow and the other half for three-phase flow. The experimental results are compared with predictions by Stone's methods. Stone's predictions of three-phase oil relative permeability are unsatisfactory. The experimental data do not support the assumption that two-phase relative permeability data can be used to predict three-phase relative permeability with a similar saturation history. The data suggest that displacement of trapped oil by gas is an important factor affecting three-phase oil permeability. It is also suggested that there exists a critical oil phase saturation to initiate three-phase flow from water-oil two-phase flow, which can be different from that in the two-phase flow. The prediction methods fail to account for these factors.