Process for the recovery of petroleum from subterranean formatio

Details Process for the recovery of petroleum from subterranean formatio Process for the recovery of petroleum from subterranean formatio

1979-03-12

1981-08-11

Leppink, James A.

Wells

Processes

Placing fluid into the formation

166274, E21B 4322

Patent

active

042829305

ABSTRACT:
An improved polymer flood process for the recovery of petroleum from a subterranean formation wherein a slug of a fresh water aqueous solution of a salt-insensitive polymer is injected into the formation prior to the undertaking of the polymer flood using a fresh water solution containing a partially hydrolyzed polyacrylamide.

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patent: 3844350 (1974-10-01), Knight et al.
patent: 3850244 (1974-11-01), Rhudy et al.
patent: 3915230 (1975-10-01), Flournoy et al.
patent: 3946811 (1976-03-01), Norton et al.
patent: 4011910 (1977-03-01), Rhudy et al.
patent: 4195689 (1980-04-01), Chang

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