Wells – Processes – With indicating – testing – measuring or locating
Patent
1989-11-03
1990-10-23
Suchfield, George A.
Wells
Processes
With indicating, testing, measuring or locating
166270, 166272, 166274, 166295, 523130, E21B 33138, E21B 4322, E21B 4324
Patent
active
049644610
ABSTRACT:
A process for use with a polymer which is crosslinkable by reaction with an amino resin, which comprises the steps of determining a period of time within which full gelation of the polymer is to be achieved; preparing a gel-forming aqueous-based mixture comprising the polymer, a rapid amino resin crosslinking agent and a delayed amino resin crosslinking agent, the gel-forming aqueous-based mixture capable of complete gelation within the period of time so determined; partially gelling the aqueous-based mixture by reacting the polymer with the rapid amino resin crosslinking agent which is effective to complete the partial gelation by crosslinking the polymer within four hours; and fully gelling the aqueous-based mixture by reacting the polymer with the delayed amino resin crosslinking agent which is effective to complete the full gelation by crosslinking the polymer within the period of time so determined. A method of enhancing the recovery of oil from a subterraean oil-bearing formation is also provided.
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McKillop A. J.
Mlotkowski M. J.
Mobil Oil Corporation
Speciale C. J.
Suchfield George A.
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