TY - JOUR
T1 - Positive effect of flow velocity on gas-condensate relative permeability
T2 - Network modelling and comparison with experimental results
AU - Jamiolahmady, M.
AU - Danesh, A.
AU - Tehrani, D. H.
AU - Duncan, D. B.
PY - 2003/8
Y1 - 2003/8
N2 - Positive velocity dependency of relative permeability of gas-condensate systems, which has been observed in many different core experiments, is now well acknowledged. The above behaviour, which is due to two-phase flow coupling in condensing systems at low interfacial tension (IFT) conditions, was simulated using a 3D pore network model. The steady-dynamic bond network model developed for this purpose was also equipped with a novel anchoring technique, which was based on the equivalent hydraulic length concept adopted from fluid flow through pipes. The available rock data on the co-ordination number, capillary pressure, absolute permeability, porosity and one set of measured relative permeability curves were utilised to anchor the capillary, volumetric and flow characteristics of the constructed network model to those properties of the real core sample. Then the model was used to predict the effective permeability values at other IFT and velocity levels. There is a reasonable quantitative agreement between the predicted and measured relative permeability values affected by the coupling rate effect.
AB - Positive velocity dependency of relative permeability of gas-condensate systems, which has been observed in many different core experiments, is now well acknowledged. The above behaviour, which is due to two-phase flow coupling in condensing systems at low interfacial tension (IFT) conditions, was simulated using a 3D pore network model. The steady-dynamic bond network model developed for this purpose was also equipped with a novel anchoring technique, which was based on the equivalent hydraulic length concept adopted from fluid flow through pipes. The available rock data on the co-ordination number, capillary pressure, absolute permeability, porosity and one set of measured relative permeability curves were utilised to anchor the capillary, volumetric and flow characteristics of the constructed network model to those properties of the real core sample. Then the model was used to predict the effective permeability values at other IFT and velocity levels. There is a reasonable quantitative agreement between the predicted and measured relative permeability values affected by the coupling rate effect.
KW - Gas-condensate
KW - Interfacial tension
KW - Mechanistic modelling
KW - Network modelling
KW - Rate effect
KW - Relative permeability
KW - Two-phase flow
UR - http://www.scopus.com/inward/record.url?scp=0038608186&partnerID=8YFLogxK
U2 - 10.1023/A:1023529300395
DO - 10.1023/A:1023529300395
M3 - Article
SN - 1573-1634
VL - 52
SP - 159
EP - 183
JO - Transport in Porous Media
JF - Transport in Porous Media
IS - 2
ER -