Claims
- 1. A process for reducing the permeability of water-out or oil-depleted zones in a high temperature subterranean formation comprising injecting a composition into said formation which forms a gel in said formation, wherein said composition comprises: (A) a water soluble polymer prepared by copolymerization of (a) an ampholytic monomer having the formula of: ##STR9## wherein one and only one of the substituted groups R.sub.1, R.sub.2, R.sub.3 and R.sub.4 must be a vinyl group, the rest can be the same or different and is a hydrogen or a C.sub.1 -C.sub.3 alkyl group; R.sub.5 is a phenyl group; n is .gtoreq.1 and .ltoreq.6; and q is 0 or 1; and (b) at least one comonomer having an ethylenic linkage; (B) a water dispersible first crosslinking compound selected from the group consisting of furfuryl alcohol, an aminobenzoic acid, aspirin, ArOC(O)R, HOArR', HOArC(O)OR', and combinations thereof; wherein Ar represents a phenyl group; R is a C.sub.1 -C.sub.6 alkyl; R' is a hydrogen, a phenyl group, or a C.sub.1 -C.sub.6 alkyl; and R' and C(O)OR' can be at ortho, meta, or para position with respect to the OH group; (C) a water dispersible second crosslinking component selected from the group consisting of an aldehyde, an aldehyde generating compound and combinations thereof; and (D) water.
- 2. A process according to claim 1 wherein said ampholytic monomer is selected from the group consisting of 1-vinyl-3-(3-sulfopropyl)-imidazolium hydroxide, 1-vinyl-3-(4-sulfobutyl)imidazolium hydroxide, 1-vinyl-2-methyl-3-(3-sulfopropyl)imidazolium hydroxide, 1-vinyl-2-methyl-3-(4-sulfobutyl)imidazolium hydroxide, 1-vinyl-3-(2-sulfobenzyl)imidazolium hydroxide, 2-vinyl-3-(3-sulfopropyl)imidazolium hydroxide, 2-vinyl-3-(4-sulfobutyl)imidazolium hydroxide, 4(5)-vinyl-1-(3-sulfopropyl sulfobutyl)imidazolium hydroxide, 4(5)-vinyl-1-(4-sulfobutyl)imidazolium hydroxide, 1-methyl-2-vinyl-3-(3-sulfopropyl)imidazolium hydroxide, 1-vinyl-3-(4-sulfobutyl)imidazolium hydroxide, and combinations thereof.
- 3. A process according to claim 1 wherein said ampholytic monomer is 1-vinyl-3-(3-sulfopropyl)imidazolium hydroxide.
- 4. A process according to claim 1 wherein said first crosslinking compound is selected from the group consisting of furfuryl alcohol, phenol, phenyl acetate, phenyl propionate, phenyl butyrate, p-hydroxybenzoic acid, methyl p-hydroxybenzoate, methyl o-hydroxybenzoate, phenyl salicylate, p-aminobenzoic acid, o-aminobenzoic acid, salicylic acid, salicylamide, salicyl alcohol, furfuryl alcohol, aspirin, ethyl p-hydroxybenzoate, o-hydroxybenzoic acid, hexyl p-hydroxybenzoate, and combinations thereof.
- 5. A process according to claim 4 wherein said first crosslinking compound is phenol.
- 6. A process according to claim 1 wherein said second crosslinking component is selected from the group consisting of formaldehyde, paraformaldehyde, acetaldehyde, propionaldehyde, decanal, glutaraldehyde, terephthaldehyde, hexamethylenetetramine, and mixtures thereof.
- 7. A process according to claim 6 wherein said crosslinking compound is formaldehyde.
- 8. A process according to claim 6 wherein said crosslinking compound is hexamethylenetetramine.
- 9. A process according to claim 1 wherein said comonomer is selected from the group consisting of acrylamide, methacrylamide, N,N-dimethylacrylamide, and combinations thereof.
- 10. A process according to claim 9 wherein said comonomer is acrylamide.
- 11. A process according to claim 1 wherein said repeating units derived from said ampholytic monomer are present in said composition in the range of from about 2 to about 98 mole percent.
- 12. A process according to claim 11 wherein said range is from about 3 to about 70 mole percent.
- 13. A process according to claim 12 wherein said range is from 5 to 50 mole percent.
- 14. A process according to claim 1 wherein said polymer is a copolymer of repeating units derived from 1-vinyl-3-(3-sulfopropyl)imidazolium hydroxide and acrylamide wherein said 1-vinyl-3-(3-sulfopropyl)imidazolium hydroxide is present in an amount within the range of 5 to 31 mole percent and said acrylamide is present in an amount within the range of 69 to 95 mole percent.
- 15. A process according to claim 1 further comprising one or more monomers selected from the group consisting of acrylonitrile, acrylic acid, methacrylic acid, alkali salts of acrylic acid, alkali salts of methacrylic acid, 2-methacryloyloxyethyltrimethylamine, 2-acrylamido-2-methylpropane sulfonic acid, alkali salts of 2-acrylamido-2-methylpropane sulfonic acid, 2-methacryloyloxyethane sulfonic acid, alkali salts of 2-methacryloyloxyethane sulfonic acid, N-vinyl-2-pyrrolidone, and combinations thereof.
- 16. A process according to claim 1 wherein said polymer is present in said composition in the range of from about 0.05 to about 10 weight percent based on total weight of said composition.
- 17. A process according to claim 16 wherein said range is from about 0.1 to about 7 weight percent.
- 18. A process according to claim 17 wherein said range is from about 0.2 to 5 weight percent.
- 19. A process according to claim 1 wherein said first crosslinking compound is present in said composition in the range of from about 0.005 to about 5 weight percent based on total weight of said composition.
- 20. A process according to claim 19 wherein said range is from about 0.01 to about 2 weight percent.
- 21. A process according to claim 20 wherein said range is from 0.03 to 1 weight percent.
- 22. A process according to claim 1 wherein said second crosslinking component is present in said composition in the range of from about 0.005 to about 5.0 weight percent.
- 23. A process according to claim 22 wherein said range is from about 0.01 to about 2 weight percent.
- 24. A process according to claim 23 wherein said range is from 0.03 to 1 weight percent.
- 25. A process according to claim 1 wherein said composition comprises a copolymer of repeating units derived from 1-vinyl-3-(3-sulfopropyl)imidazolium hydroxide and acrylamide, a first crosslinking compound, a second crosslinking component and water; wherein said 1-vinyl-3-(3-sulfopropyl)imidazolium hydroxide is present in an amount of 30 mole percent of said copolymer; said acrylamide is present in an amount of 70 mole percent of said copolymer; said copolymer is present in said composition in the range of from 0.2 to 5 weight percent; said first crosslinking compound is phenol which is present in said composition in the range of from 0.03 to 1.0 weight percent; said second crosslinking component is formaldehyde which is present in said composition in the range of from 0.03 to 1.0 weight percent; and said water makes up the rest of said composition.
- 26. A process according to claim 1 wherein said injecting is carried out in said subterranean formation having a temperature range of from about 150.degree. F. to about 350.degree. F.
- 27. A process according to claim 25 wherein said injection is carried out in said subterranean formation having a temperature range of 200.degree. F. to 300.degree. F.
Parent Case Info
This application is a division of application Ser. No. 07/873,135, filed Apr. 24, 1992, now U.S. Pat. No. 5,270,382
US Referenced Citations (9)
Foreign Referenced Citations (1)
Number |
Date |
Country |
976547 |
Nov 1964 |
GBX |
Non-Patent Literature Citations (3)
Entry |
Polymer, vol. 19, pp. 1157-1162 (Salamone et al, Oct. 1978). |
J. Appl. Poly. Sci., vol. 22, pp. 1343-1357 (Taylor et al, 1978). |
Chem. Abstr. 77:165125, synthesis and polymerization of vinylimidazole salts. |
Divisions (1)
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Number |
Date |
Country |
Parent |
873135 |
Apr 1992 |
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