Journal article
Experimental determination of relative permeabilities and critical gas saturations under solution-gas drive
Relative permeabilities are crucial to predict oil production from underground reservoirs. Multiple previous studies are limited to measuring/estimating relative permeabilities within the region where both phases are mobile. This study presents a novel experimental method to measure the oil relative permeability under presence of the trapped gas for gas-oil systems under depressurization.
The experiments were carried out with the carbonaceous reservoir and outcrop samples. The results show a highly variable amount of immobile gas for North Sea chalk (from 8% up to 26% volume) and a significant reduction in oil relative permeability (up to 75%). The relative permeabilities were found to be power-law type functions.
A comparison with the previously developed pore-network based model for gas-oil relative permeabilities is presented, allowing for reconstruction of both gas and oil relative permeability curves in the whole saturation range.
Language: | English |
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Year: | 2021 |
Pages: | 108509 |
ISSN: | 09204105 and 18734715 |
Types: | Journal article |
DOI: | 10.1016/j.petrol.2021.108509 |
ORCIDs: | Al-Masri, Wael and Shapiro, Alexander |