Wells – Processes – Distinct – separate injection and producing wells
Patent
1990-12-17
1992-10-20
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166272, 166273, 166295, 166300, 523130, E21B 33138, E21B 4322, E21B 4324
Patent
active
051562146
ABSTRACT:
A method for imparting selectivity to an in-situ gel-forming composition for placement within a subterranean oil-bearing formation having relatively high permeability zones and relatively low permeability zones, comprising the steps of: preparing an aqueous-based mixture, the mixture comprising: a first stage gel-forming composition in an amount effective to selectively enter the relatively high permeability zones of the formation, the first stage composition including a heteropolysaccharide prepared by growing Xanthomonas campestris NCIB 11854 in an aqueous nutrient medium by aerobic fermentation and recovering the heteropolysaccharide and a crosslinking agent for the heteropolysaccharide; and at least one second stage in-situ gel-forming composition comprising a water-dispersible polymer and a crosslinking agent for the water-dispersible polymer in an amount effective to form a stable gel; and gelling the first stage gel-forming composition ex-situ by reacting the Xanthomonas campestris NCIB 11854 heteropolysaccharide with the crosslinking agent for the heteropolysaccharide. The mixture so prepared exhibits greater selectivity than would a like mixture in the absence of the first stage selective gel-forming composition.
REFERENCES:
patent: 3305016 (1967-02-01), Lindblom et al.
patent: 3557562 (1971-01-01), McLaughlin, Jr. et al.
patent: 3810882 (1974-05-01), Browning et al.
patent: 3908760 (1975-09-01), Clampitt et al.
patent: 3918521 (1975-11-01), Snavely, Jr. et al.
patent: 4009755 (1977-03-01), Sandiford
patent: 4069869 (1978-01-01), Sandiford
patent: 4157322 (1979-06-01), Colegrove
patent: 4309523 (1982-01-01), Engelhardt et al.
patent: 4413680 (1983-11-01), Sandiford et al.
patent: 4461351 (1984-07-01), Falk
patent: 4479894 (1984-10-01), Chen et al.
patent: 4489783 (1984-12-01), Shu
patent: 4565249 (1986-01-01), Pebdani et al.
patent: 4606407 (1986-08-01), Shu
patent: 4644020 (1987-02-01), Stahl
patent: 4653585 (1987-03-01), Chung et al.
patent: 4658898 (1987-04-01), Paul et al.
patent: 4706754 (1987-11-01), Smith
patent: 4716966 (1988-01-01), Shu
patent: 4758356 (1988-07-01), Downs
patent: 4776398 (1988-10-01), Chu et al.
patent: 4782901 (1988-11-01), Phelps et al.
patent: 4787451 (1988-11-01), Mitchell
patent: 4793416 (1988-12-01), Mitchell
patent: 4810732 (1989-03-01), Shu
patent: 4834180 (1989-05-01), Shu
patent: 4856586 (1989-08-01), Phelps et al.
patent: 4901795 (1990-02-01), Phelps et al.
patent: 4903767 (1990-02-01), Shu et al.
patent: 4964461 (1990-10-01), Shu
patent: 4991652 (1991-02-01), Hoskin et al.
patent: 5002980 (1991-03-01), Phelps et al.
Hoskin Dennis H.
Sifferman Thomas R.
McKillop Alexander J.
Mlotkowski Michael J.
Mobil Oil Corporation
Speciale Charles J.
Suchfield George A.
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