Enhanced oil recovery method using a (co)polymer of a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid

Patent metadata

Field	Value
Publication number	US-11180446-B2
Application number	US-201816494844-A
Country	US
Kind code	B2
Filing date	Mar 19, 2018
Priority date	Mar 20, 2017
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

A process for enhanced oil recovery comprising the following steps:a) Preparation of an injection fluid comprising at least one water-soluble (co)polymer prepared at least from 2-acrylamido-2-methylpropane sulfonic acid (ATBS) or from at least one of its salts, with water or with brine, where the 2-acrylamido-2-methylpropane sulfonic acid is a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, 46.04° degrees.b) Injection of injection fluid into an underground formation,c) Flushing of the underground formation using the fluid injected,d) Recovery of an aqueous and hydrocarbon mixture.

First claim

What is claimed is:

1. A process for enhanced oil recovery comprising the following steps:
a. preparing an injection fluid comprising at least one water-soluble (co)polymer prepared at least from 2-acrylamido-2-methylpropane sulfonic acid (ATBS) or from at least one of its salts, with water or with brine,
wherein the 2-acrylamido-2-methylpropane sulfonic acid is a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, and 46.04° degrees;

b. injecting injection fluid into an underground formation;
c. flushing of the underground formation using the fluid injected; and
d. recovering an aqueous and hydrocarbon mixture.

2. The process according to claim 1 , wherein the injection fluid comprises between 10 ppm and 15,000 ppm of water-soluble (co)polymer.

3. The process according to claim 2 , wherein the water-soluble (co)polymer is prepared at least from 2-acrylamido-2-methylpropane sulfonic acid of which 50% to 100% is in the hydrated crystalline form.

4. The process according to claim 2 , wherein the water-soluble (co)polymer is a (co)polymer obtained at least from 2-acrylamido-2-methylpropane sulfonic acid of which 50% to 100% is in the hydrated crystalline form and of at least one nonionic monomer and/or at least one anionic monomer and/or at least one cationic monomer and/or a zwitterionic monomer.

5. The process according to claim 4 , wherein the nonionic monomer is chosen from acrylamide, methacrylamide, N-isopropylacrylamide, N,N-dimethylacrylamide, N,N-diethylacrylamide, N-methylolacrylamide, N-vinylformamide, N-vinyl acetamide, N-vinylpyridine, N-vinylpyrrolidone, N-vinyl imidazole, N-vinyl succinimide, acryloyl morpholine (ACMO), acryloyl chloride, glycidyl methacrylate, glyceryl methacrylate, diacetone acrylamide and isoprenol.

6. The process according to claim 4 , wherein the anionic monomer is chosen from acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, acrylamido undecanoic acid, 3-acrylamido 3-methylbutanoic acid, maleic anhydride, vinylsulfonic acid, vinylphosphonic acid, allylsulfonic acid, methallylsulfonic acid, 2-methylidenepropane-1,3-disulfonic acid, 2-sulfoethylmethacrylate, sulfopropylmethacrylate, sulfopropylacrylate, allylphosphonic acid, styrene sulfonic acid, 2-acrylamido-2-methyl propane disulfonic acid; and water-soluble salts of these monomers like their alkali metal, alkaline earth metal, or ammonium salts.

7. The process according to claim 2 , wherein the water-soluble (co)polymer is a (co)polymer obtained at least from 2-acrylamido-2-methylpropane sulfonic acid of which 50% to 100% is in the hydrated crystalline form and of at least one nonionic monomer and/or at least one anionic monomer, and wherein:
the nonionic monomer is chosen from acrylamide, methacrylamide, N-isopropylacrylamide, N,N-dimethylacrylamide, N,N-diethylacrylamide, N-methylolacrylamide, N-vinylformamide, N-vinyl acetamide, N-vinylpyridine, N-vinylpyrrolidone, N-vinyl imidazole, N-vinyl succinimide, acryloyl morpholine (ACMO), acryloyl chloride, glycidyl methacrylate, glyceryl methacrylate, diacetone acrylamide and isoprenol; and
the anionic monomer is chosen from acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, acrylamido undecanoic acid, 3-acrylamido 3-methylbutanoic acid, maleic anhydride, vinylsulfonic acid, vinylphosphonic acid, allylsulfonic acid, methallylsulfonic acid, 2-methylidenepropane-1,3-disulfonic acid, 2-sulfoethylmethacrylate, sulfopropylmethacrylate, sulfopropylacrylate, allylphosphonic acid, styrene sulfonic acid, 2-acrylamido-2-methyl propane disulfonic acid; and water-soluble salts of these monomers like their alkali metal, alkaline earth metal, or ammonium salts.

8. The process according to claim 7 , wherein the injection fluid comprises between 50 ppm and 10,000 ppm of (co)polymer.

9. The process according to claim 8 , wherein the injection fluid comprises between 100 and 5,000 ppm of (co)polymer.

10. The process according to claim 7 , wherein the (co)polymer is obtained at least from the 2-acrylamido-2-methylpropane sulfonic acid of which 50% to 100% is in the hydrated crystalline form and the at least one nonionic monomer.

11. The process according to claim 7 , wherein the (co)polymer is obtained at least from the 2-acrylamido-2-methylpropane sulfonic acid of which 50% to 100% is in the hydrated crystalline form and the at least one anionic monomer.

12. The process according to claim 1 , wherein the water-soluble (co)polymer is prepared at least from 2-acrylamido-2-methylpropane sulfonic acid of which 50% to 100% is in the hydrated crystalline form.

13. The process according to claim 1 , wherein the water-soluble (co)polymer is a (co)polymer obtained at least from 2-acrylamido-2-methylpropane sulfonic acid of which 50% to 100% is in the hydrated crystalline form and of at least one nonionic monomer and/or at least one anionic monomer and/or at least one cationic monomer and/or a zwitterionic monomer.

14. The process according to claim 13 , wherein the nonionic monomer is chosen from acrylamide, methacrylamide, N-isopropylacrylamide, N,N-dimethylacrylamide, N,N-diethylacrylamide, N-methylolacrylamide, N-vinylformamide, N-vinyl acetamide, N-vinylpyridine, N-vinylpyrrolidone, N-vinyl imidazole, N-vinyl succinimide, acryloyl morpholine (ACMO), acryloyl chloride, glycidyl methacrylate, glyceryl methacrylate, diacetone acrylamide and isoprenol.

15. The process according to claim 13 , wherein the anionic monomer is chosen from acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, acrylamido undecanoic acid, 3-acrylamido 3-methylbutanoic acid, maleic anhydride, vinylsulfonic acid, vinylphosphonic acid, allylsulfonic acid, methallylsulfonic acid, 2-methylidenepropane-1,3-disulfonic acid, 2-sulfoethylmethacrylate, sulfopropylmethacrylate, sulfopropylacrylate, allylphosphonic acid, styrene sulfonic acid, 2-acrylamido-2-methyl propane disulfonic acid; and water-soluble salts of these monomers like their alkali metal, alkaline earth metal, or ammonium salts.

16. The process according to claim 1 , wherein the injection fluid comprises between 50 ppm and 10,000 ppm of (co)polymer.

17. The process according to claim 16 , wherein the injection fluid comprises between 100 and 5,000 ppm of (co)polymer.

18. The process according to claim 1 , wherein the water-soluble (co)polymer is a homopolymer prepared from the hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid.

19. The process according to claim 18 , wherein the injection fluid comprises between 50 ppm and 10,000 ppm of (co)polymer.

20. The process according to claim 19 , wherein the injection fluid comprises between 100 and 5,000 ppm of (co)polymer.

Assignees

• Spcm Sa

Inventors

• Favero Cédrick
• Kieffer Johann
• Daguerre Frédéric

Classifications

• C07C309/15 Primary

  the nitrogen atom of at least one of the amino groups being part of any of the groups [IMAGE cpc-sch-C07C-0975.gif], X being a hetero atom, Y being any atom · CPC title

• E21B43/26

  by forming crevices or fractures · CPC title

• C07B2200/13

  Crystalline forms, e.g. polymorphs · CPC title

• C08F20/56

  Acrylamide; Methacrylamide · CPC title

• C08F20/58

  containing oxygen in addition to the carbonamido oxygen {, e.g. N-methylolacrylamide, N-acryloylmorpholine} · CPC title