Abstract: A method for selecting compositions of first and second slugs to be injected into an underground formation includes selecting a first salinity and a first polymer concentration for a first slug to be injected into a well; selecting a second salinity and a second polymer concentration for a second slug to be injected into the well; injecting the first slug into the well; and injecting the second slug into the well. The second slug is injected immediately after the first slug.

Abstract: A method for selecting compositions of first and second slugs to be injected into an underground formation includes selecting a first salinity and a first polymer concentration for a first slug to be injected into a well; selecting a second salinity and a second polymer concentration for a second slug to be injected into the well; injecting the first slug into the well; and injecting the second slug into the well. The second slug is injected immediately after the first slug.

Abstract: A numerical procedure is disclosed to improve the prediction of heat fronts when simulating hot fluid injection in viscous hydrocarbon reservoirs. The mathematical model is composed of the conventional governing equations that describe multiphase fluid flow and energy balance. The reservoir geometry can be partitioned into a regular Cartesian grid or an irregular corner-point geometry grid. The numerical procedure uses the finite different (FD) method to solve the flow equations and the discontinuous Galerkin (DG) method to solve the energy balance equation. The proposed FD-DG method is an alternative to the traditional solution procedure that uses the FD method to solve both the flow and the energy equations. The traditional method has the deficiency that it may require excessive number of grid cells to achieve acceptable resolution of the heat fronts.

Abstract: A numerical procedure is disclosed to improve the prediction of heat fronts when simulating hot fluid injection in viscous hydrocarbon reservoirs. The mathematical model is composed of the conventional governing equations that describe multiphase fluid flow and energy balance. The reservoir geometry can be partitioned into a regular Cartesian grid or an irregular corner-point geometry grid. The numerical procedure uses the finite different (FD) method to solve the flow equations and the discontinuous Galerkin (DG) method to solve the energy balance equation. The proposed FD-DG method is an alternative to the traditional solution procedure that uses the FD method to solve both the flow and the energy equations. The traditional method has the deficiency that it may require excessive number of grid cells to achieve acceptable resolution of the heat fronts.