ABSTRACT
The extended, black-oil, miscible reservoir simulator MASTER was developed specifically to support the Department of Energy's Enhanced Oil Recovery Program. The implicit-in-pressure, explicit-in-saturation simulator contains mass balance equations for oil, water, natural gas, up to four solvent species, and a surfactant. Several options have been incorporated into MASTER to simulate the phenomena associated with gas miscible flooding: (1) including the loss of solvent to the aqueous phase, (2) choosing the degree that water blocks oil from contacting injected solvent, (3) allowing precipitation of asphaltenes with subsequent permeability reduction, and (4) reducing gas mobility as a function of surfactant concentration. MASTER was validated by comparing predicted results with results presented in the Society of Petroleum Engineers first and fifth comparative solution problems. Results predicted by MASTER compared favorably with SPE's results. Thus, MASTER can be disseminated for public use.
