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Type: Journal article
Title: An Experimental investigation of the effect of pressure gradient on gas-oil relative permeability in Iranian carbonate rocks
Author: Keshavarz, A.
Vatanparast, H.
Zargar, M.
Kalantariasl, A.
Haghighi, M.
Citation: Petroleum Science and Technology, 2012; 30(14):1508-1522
Publisher: Marcel Dekker Inc
Issue Date: 2012
ISSN: 1091-6466
Statement of
A. Keshavarz, H. Vatanparast, M. Zargar, A. Kalantari Asl and M. Haghighi
Abstract: The authors examine the effect of pressure gradient on gas-oil relative permeability in horizontal and vertical immiscible displacement. The experiments are conducted on a core from lower Dalan formation in the South Pars oilfield of Iran, in constant pressure, unsteady-state condition, and different pressure gradients. The Toth method is used for calculating the relative permeability and plotting proper curves. Data analysis and the effect of pressure gradient on gas-oil relative permeability are investigated. Results show that relative permeability curves are affected by pressure gradient and this effect is much prominent at low pressures due to end-effect phenomena. The dependence of relative permeability curves on pressure gradient is correlated as a function of dimensionless capillary number. The accuracy of this correlation for relative permeability prediction is examined and a new method is introduced to minimize the end-effect phenomena on relative permeability curves.
Keywords: Capillary number; end-effect; immiscible displacement; pressure gradient; relative permeability
Rights: Copyright © Taylor & Francis Group, LLC
RMID: 0020119381
DOI: 10.1080/10916466.2010.506463
Appears in Collections:Australian School of Petroleum publications

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