A Model for Relative Permeabilities Under Gas Liberation or Condensate Precipitation in Porous Medium

Abstract

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Experimental determination of relative permeabilities and critical gas saturations under solution-gas drive

“…These values agree with the values of critical gas saturation for North Sea cores found in the literature. • Finally, it has been shown that by using the model developed in our previous work (Al-Masri and Shapiro, 2020), it may be possible to use the results from the proposed experiment to predict the whole relative permeability curves for both the oil and gas phases. This conclusion needs further experimental verification.…”

Impact of Gas Liberation Effects on the Performance of Low Permeability Reservoirs

“…A mathematical model in [16] expresses the relative permeabilities [8] in terms of microscopic characteristics of the porous medium and validates the model at the core scale. In the present work, we apply for the first time the relative permeabilities [8,16] at the reservoir scale.…”

“…A mathematical model in [16] expresses the relative permeabilities [8] in terms of microscopic characteristics of the porous medium and validates the model at the core scale. In the present work, we apply for the first time the relative permeabilities [8,16] at the reservoir scale. The goal is to verify, whether the new permeabilities may be applied for history matching and recovery forecast on a large scale, and, whether they may explain the observed discrepancies between the oil production between the different Valdemar wells.…”

“…A number of experimental studies [19][20][21] suggest that water and gas relative permeabilities are dependent only on their respective saturations. In what follows, we extend the two-phase gas-oil model [8,16] to the three-phase case by using interpolation between the corresponding two-phase permeabilities [22].…”

“…Recent results [8] demonstrated that certain difficulties in measuring the gas-oil relative permeabilities on Valdemar core samples could be alleviated by utilizing a novel experimental setup, where oil is recirculated through the core while gas is kept immobile below its critical saturation. Further, a mathematical model [16] can be used to obtain the gas-oil relative permeabilities in the whole saturation range, based on the experimental data from the saturation region where gas is immobile. The model has been shown to match the data on gas-oil or gas-condensate relative permeabilities available in the literature, as well as the authors' experimental data from outcrop samples and cores from North Sea reservoirs.…”