Wells – Processes – Distinct – separate injection and producing wells
Patent
1991-11-18
1993-04-06
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166272, 166288, 166295, E21B 33138, E21B 4324
Patent
active
051994909
ABSTRACT:
Disclosed are processes for treating a subterranean formation to improve the permeability distribution by reducing the permeability in high permeability zones, so fluids injected for oil recovery purposes will sweep more uniformly through the formation. The processes involve injecting a polymerizable compound, preferably a monomer or oligomer of furfuryl alcohol, together with a diluent, preferably an ester such as butyl acetate, and a suitable acid catalyst for the formation conditions, generally toluenesulfonic acid. The fluid may be injected in a liquid phase or mixed with steam or non-condensable gas to form an aerosol, which is injected then into the formation prior to the injection of the oil recovery fluid, which may be water, surfactant fluid, polymer fluid, or steam.
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Fader Philip D.
Pardo Carlos W.
Surles Billy W.
Bailey James L.
Park Jack H.
Suchfield George A.
Texaco Inc.
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