PORE-SCALE MODELING OF THREE-PHASE FLOW: COMPARATIVE STUDY WITH EXPERIMENTAL RESERVOIR DATA

摘要

We present a general network model to simulate three-phase capillary dominated processes on pore networks extracted from a digitized representation of the rock microstructure. Important features,such as wettability alteration,hysteresis,intermediate phase spreading layers,and true three-phase capillary entry pressures,are implemented in the model.The model has been used to compute two- and three-phase relative permeabilities of a reconstructed reservoir rock.First,the model is anchored to the experimental two-phase data to yield end point saturations and the pore-scale wettability (i.e.contact angle) distribution.Next,predictions of three-phase relative permeabilities for different displacement processes are made.The computed results are compared with recently acquired experimental data.These data represent two- and three-phase steadystate flow measurements under in-situ conditions on composite core material from the Statfjord field(SCA2008-23) [15].