PERMEABILITY MODIFICATION STIMULATOR STUDIES OF POLYMER-GEL-TREATMENTINITIATION TIME AND CROSS-FLOW EFFECTS ON WATERFLOOD OIL-RECOVERY

A 3D, three-phase (oil/water/gas) permeability modification simulator was developed by incorporating an in-situ gelation model into a black- oil simulator (BOAST). Several important features that describe gel-sy stem transport in a porous medium were considered. Simulation results showed that the effectiveness of a gel treatment in either an injectio n or production weller in an injection and a production well together decreased as k(V)/k(H) increased. The best gel treatment initiation ti me in the injection well only or the injection and production wells to gether was approximately when water breakthrough occurred. The new sim ulator is useful to simulate and to optimize any combination of primar y production, waterflooding, polymer flooding and permeability modific ation treatments.