Fractional-Flow Theory for Non-Newtonian Surfactant-Alternating-Gas Foam Processes

Foam can improve sweep efficiency in gas-injection-enhanced oil recovery. Surfactant-alternating-gas (SAG) is a favored method of foam injection. Laboratory data indicate that foam can be non-Newtonian at low water fractional flow f_w, and therefore during gas injection in a SAG process. We investigate the implications of this...

Numerical Simulation of Radial Non-Newtonian Foam Flow in a Reservoir

Non-Newtonian foam flow in a reservoir can be modeled numerically by discretization of the corresponding analytical formulas. The injection of foam is compared to the injection of water by comparing the injection pressures, which is represented as a dimensionless pressure rise at the injection well. The model first applies the forward-difference...