Method, system and program storage device for reservoir simulation utilizing heavy oil solution gas drive

摘要

A method, a system and a program storage device for predicting a property of a fluid, such as fluid production from a subterranean reservoir containing heavy oil entrained with gas is described. The method includes developing a baseline correlation of gas relative permeability k_rg versus gas saturation S_g. A capillary number dependent correlation is determined capturing the relationship between at least one of critical gas saturation S_gc and capillary number N_ca and gas relative permeability k_rgro and capillary number N_ca phased upon a plurality of depletion rates. Capillary numbers N_c are calculated for a plurality of cells in a reservoir model representative of the subterranean reservoir. The baseline correlation is then adjusted to comport with at least one of S_gc and k_rgro selected from the capillary number dependent correlation to produce a plurality of corresponding adjusted baseline, correlations. Gas relative permeabilities k_rg for the plurality of cells are selected from the corresponding adjusted baseline correlations. A reservoir simulation is then run utilizing the selected relative permeabilities k_rg to predict a property of at least one fluid in a subterranean reservoir containing heavy oil entrained with gas.