Oil reservoir permeability control using polymeric gels

Details Oil reservoir permeability control using polymeric gels Oil reservoir permeability control using polymeric gels

E - Fixed Constructions

21

B

31/26

E21B 43/25 (2006.01) C09K 8/90 (2006.01)

Patent

CA 1246856

OIL RESERVOIR PERMEABILITY CONTROL USING POLYMERIC GELS ABSTRACT OF THE DISCLOSURE: 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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