Wells – Processes – With indicating – testing – measuring or locating
Patent
1989-03-10
1990-04-10
Suchfield, George A.
Wells
Processes
With indicating, testing, measuring or locating
166270, 166272, 166273, 166295, 166300, E21B 33138, E21B 4322, E21B 4324
Patent
active
049151703
ABSTRACT:
A method for controlling the permeability profile of a subterranean oil-bearing formation utilizing polymeric gel-forming compositions which gel in-situ. The method comprises the steps of determining an amount of polymeric gel required for profile control; introducing a first aqueous gel-forming composition in a non-gelatinous state into the formation in an amount which is a portion of the total gel requirement; and, introducing into the formation in a non-gelatinous state at least a second aqueous composition capable of forming a gel at a rate in excess of the first gel-forming composition wherein the gelation of all compositions proceeds in timed relation such that each solution gels at approximately the same time. The method so described reduces reservoir shut-in time and is especially useful in the treatment of large reservoirs.
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McKillop Alexander J.
Mlotkowski Michael J.
Mobil Oil Corporation
Speciale Charles J.
Suchfield George A.
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