Wells – Processes – Distinct – separate injection and producing wells
Patent
1975-11-06
1976-09-21
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166273, 166294, E21B 4322, E21B 33138
Patent
active
039813630
ABSTRACT:
A method is provided for obtaining good residual resistance factor at relatively low ratios of crosslinking agents to polymer for plugging fractured or porous media using a method of injecting into the formation a first aqueous polymer solution followed by an injection of crosslinking agents capable of gelling the polymer solution and thereafter injecting a second aqueous polymer solution that is capable of being gelled by the crosslinking agents. In each of the aqueous polymer solutions the polymer is already partially crosslinked before the polymer solution is injected into the formation. This process is applicable to production wells and injection wells.
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Novosad Stephen J.
Phillips Petroleum Company
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