Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1989-03-10
1990-12-25
Jacobs, Lewis T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524521, 524522, 525196, 525218, 525221, C09K 700, C08L 3326, C08L 3302
Patent
active
049803930
ABSTRACT:
Improved polymer gels for oil reservoir permeability control have a continuous, cross-linked polymer phase having a relatively low density of cross-linking with domains of clustered, high density cross-linking. The clustered high density cross-linkings contribute to the gel's shear stability and gel strength while the continuous, low density phase contributes to good injectivity. Gels of this kind are produced by cross-linking a base polymer with a relatively low density of cross-linking sites with a reinforcing polymer having a higher cross-linking site density. Suitable polymers have ligand groups which are capable of forming coordination cross-linkages with polyvalent metals, especially chromium and include polyacrylamides as base polymers and polyacrylic acids as reinforcing polymers.
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Buttner David
Jacobs Lewis T.
McKillop Alexander J.
Mobil Oil Corporation
Schneller Marina V.
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