Permeability or fluid mobility reduction treatment for a hydrocarbon-bearing formation using a dual molecular weight polymer gel

摘要: A process is provided for reducing the permeability of or fluid mobility within a high-temperature treatment region in proximate to hydrocarbon-- bearing formation below an earthen surface penetrated by well bore. The initiated preparing gelation solution at which includes base loading high molecular weight acrylamide polymer, additive low crosslinking agent, and aqueous solvent. agent preferably chromium(III) complex having one more cations carboxylate anions. resulting injected into bore displaced where it gelled situ form gel substantially reduces region.