Enhanced hydrocarbon recovery by permeability modification...

Details Enhanced hydrocarbon recovery by permeability modification... Enhanced hydrocarbon recovery by permeability modification...

E - Fixed Constructions

21

B

31/21

E21B 43/25 (2006.01) C09K 8/88 (2006.01) E21B 43/32 (2006.01)

Patent

CA 1245845

Enhanced Hydrocarbon Recovery by Permeability Modification with Phenolic Gels Abstract Hydrocarbon recovery from subterranean reservoirs that are penetrated by either injector or producer wells is enhanced by selective permeability modifica- tion of the strata of the reservoir with gel-forming phenolic compositions. The injection of the phenolic composition follows a pH sequence specific to the reservoir environment which allows emplacement of the gel-forming composition the desired distance away from the wellbore and production of a uniform gel throughout the treated hydrocarbon-bearing reservoir. The per- meability of a treated subterranean reservoir can be restored by treatment of the reservoir with either aqueous hypachlorite or mineral acid.

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