Wells – Processes – Distinct – separate injection and producing wells
Patent
1985-05-24
1987-04-21
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166246, 166275, 166294, 166295, 166300, 523130, E21B 33138, E21B 4322
Patent
active
046588981
ABSTRACT:
The permeability of subterranean oil-bearing formations is selectively reduced by the injection into the formation of the non-xanthan, anionic heteropolysaccharide S-130 produced by fermentation with a microorganism of the Alcaligenes species. The polymer forms shear-thinning, viscous solutions which selectively enter the more highly permeable regions of the formation and form a gel plug in them to reduce their permeability. The polymer forms gels which are stable under a wide range of reservoir conditions including high temperatures.
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Paul James M.
Strom Edwin T.
Gilman Michael G.
Harrison, Jr. Van D.
McKillop Alexander J.
Mobil Oil Corporation
Suchfield George A.
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