Procedure for improving reservoir sweep efficiency using paraffi

Details Procedure for improving reservoir sweep efficiency using paraffi Procedure for improving reservoir sweep efficiency using paraffi

1988-09-15

1989-06-27

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166294, 166312, E21B 33134, E21B 4324, E21B 3700

Patent

active

048420700

ABSTRACT:
A method for selectively placing and removing a plugging agent in a formation adjacent a wellbore comprising preheating the wellbore, heating and injecting the plugging agent at a temperature higher than its melting point, shutting in the well to allow the plugging agent in the formation to cool and solidify, reheating the formation adjacent the wellbore, and swabbing back the liquidified plugging agent from the low permeability zones adjacent the wellbore. The expected benefit is reduction of permeability in the high permeability zones without a corresponding loss of permeability in the low permeability zones. The method provides better vertical sweep and improved recovery.

REFERENCES:
patent: 1307027 (1919-06-01), Swan
patent: 1327268 (1920-01-01), Christians
patent: 2753939 (1956-07-01), Carpenter et al.
patent: 2779415 (1957-01-01), Howard
patent: 2799341 (1957-07-01), Maly
patent: 3003555 (1961-10-01), Freeman et al.
patent: 3399623 (1968-09-01), Creed
patent: 4444261 (1984-04-01), Islip

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