Hydrophobically and hydrophilically modified polysaccharides and methods of using the same for treatment of a subterranean formation

Patent metadata

Field	Value
Publication number	US-10155897-B2
Application number	US-201314895135-A
Country	US
Kind code	B2
Filing date	Aug 16, 2013
Priority date	Aug 16, 2013
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

Hydrophobically and hydrophilically modified polysaccharides and methods of using the same for treatment of a subterranean formation. A method of treating a subterranean formation. The method includes obtaining or providing a composition including a hydrophobically and hydrophilically modified polysaccharide (HHMP). The method includes placing the composition in a subterranean formation.

First claim

What is claimed is:

1. A method of treating a subterranean formation, the method comprising:
placing in the subterranean formation a composition comprising a hydrophobically and hydrophilically modified polysaccharide (HHMP), and
0.01 to about 30 wt. %, based on the total weight of the composition, of a salt,
wherein the composition has a yield strength of about 0.01 Pa to about 100,000 Pa.

2. The method of claim 1 , wherein the method comprises hydraulic fracturing, drilling, gravel packing, or a combination thereof.

3. The method of claim 1 , wherein the HHMP is crosslinked.

4. The method of claim 1 , wherein the HHMP comprises a linear polysaccharide.

5. The method of claim 1 , wherein the HHMP comprises a polysaccharide comprising at least one of acetan, alginate, alginic acid, cellulose, chitosan, curdlan, a cyclosophoran, dextran, emulsan, a galactoglucopolysaccharide, gellan, glucuronan, N-acetyl-glucosamine, N-acetyl-heparosan, hyaluronic acid, indicant, kefiran, lentinan, levan, mauran, pullulan, scleroglucan, schizophyllan, stewartan, succinoglycan, xanthan, welan, and a derivative thereof having —O—(R 9 ) n —OH groups in place of —OH groups, wherein at each occurrence R 9 is independently substituted or unsubstituted (C 1 -C 20 )hydrocarbylene interrupted or terminated by 0, 1, 2, or 3 of at least one of O, S, and substituted or unsubstituted N and at each occurrence n is independently about 2 to about 2,000.

6. The method of claim 1 , wherein the hydrophilic modification of the HHMP comprises at least one —O-PG group, wherein PG is a hydrophilic group.

7. The method of claim 6 , wherein at each occurrence PG is independently selected from the group consisting of —(C 0 -C 50 )hydrocarbyl-A and -L-(C 0 -C 50 )hydrocarbyl-A, wherein hydrocarbyl is substituted or unsubstituted, wherein:
at each occurrence L is independently selected from the group consisting of:
substituted or unsubstituted (C 1 -C 50 )hydrocarbyl interrupted or terminated by 0, 1, 2, or 3 of at least one of O, S, and substituted or unsubstituted N, and
—[R 9 ] n — wherein at each occurrence R 9 is independently substituted or unsubstituted (C 1 -C 20 )hydrocarbylene interrupted or terminated by 0, 1, 2, or 3 of at least one of O, S, and substituted or unsubstituted N and at each occurrence n is independently about 2 to about 2,000; and

at each occurrence A is independently selected from the group consisting of —C(O)O − CI + , —S(O)(O)O − CI + , and —P(O)(O)(O − CI + )(O − R + ), wherein at each occurrence CI + is independently a counterion, and wherein at each occurrence R + is independently selected from the group consisting of H + and CI + .

8. The method of claim 7 , wherein PG is:

9. The method of claim 1 , wherein the hydrophobic modification of the HHMP comprises at least one —O-NPG group, wherein NPG is a hydrophobic group.

10. The method of claim 9 , wherein at each occurrence NPG is independently selected from the group consisting of —R 11 and -L-R 11 , wherein:
at each occurrence R 11 is independently substituted or unsubstituted —(C 3 -C 50 )hydrocarbyl interrupted or terminated by 0, 1, 2, or 3 of at least one of O, S, and substituted or unsubstituted N; and
at each occurrence L is independently selected from the group consisting of:
substituted or unsubstituted (C 1 -C 50 )hydrocarbyl interrupted or terminated by 0, 1, 2, or 3 of at least one of O, S, and substituted or unsubstituted N, and
—[R 9 ] n — wherein at each occurrence R 9 is independently substituted or unsubstituted (C 1 -C 20 )hydrocarbylene interrupted or terminated by 0, 1, 2, or 3 of at least one of O, S, and substituted or unsubstituted N and at each occurrence n is independently about 2 to about 2,000.

11. The method of claim 10 , wherein NPG is -L-(C 10 -C 50 )alkyl.

12. The method of claim 10 , wherein NPG is —(C 1 -C 5 )alkyl-O—(C 10 -C 50 )alkyl, wherein (C 1 -C 5 )alkyl is substituted with 0, 1, 2, or 3 —OH groups.

13. The method of claim 10 , wherein NPG is:

14. The method of claim 1 , wherein the HHMP comprises a monosaccharide repeating unit having the structure:

wherein at each occurrence each of R 1 , R 2 , R 3 , R 4 , and R 5 are independently selected from the group consisting of —R 7 and —OR 7 ;
at each occurrence R 7 is independently selected from the group consisting of —H and -L-R 8 ;
at each occurrence R 8 is independently selected from the group consisting of —R 6 and —OR 6 , wherein at each occurrence R 6 is independently selected from —H, -PG, and -NPG, wherein at each occurrence PG is independently a hydrophilic group and at each occurrence NPG is independently a hydrophobic group;
at each occurrence L is independently selected from the group consisting of:
substituted or unsubstituted (C 1 -C 50 )hydrocarbyl interrupted or terminated by 0, 1, 2, or 3 of at least one of O, S, and substituted or unsubstituted N, and
—[R 9 ] n — wherein at each occurrence R 9 is independently substituted or unsubstituted (C 1 -C 20 )hydrocarbylene interrupted or terminated by 0, 1, 2, or 3 of at least one of O, S, and substituted or unsubstituted N and at each occurrence n is independently about 2 to about 2,000; and

wherein the polysaccharide has at least one PG group and at least one NPG group.

15. The method of claim 14 , wherein the HHMP comprises a monosaccharide repeating unit having the structure:

16. The method of claim 14 , wherein the HHMP comprises a monosaccharide repeating unit having the structure:

17. The method of claim 14 , wherein the HHMP comprises, in a random or block copolymer arrangement, the structure:

18. The method of claim 17 , wherein the HHMP comprises, in a random or block copolymer arrangement, the structure:

19. A system for performing the method of claim 1 , the system comprising:
a tubular disposed in the subterranean formation; and
a pump configured to pump the composition comprising the hydrophobically and hydrophilically modified polysaccharide (HHMP) in the subterranean formation through the tubular.

Assignees

• Halliburton Energy Services Inc
• Hilliburton Energy Services Inc

Inventors

• Alwattari Ali

Classifications

• C09K8/90

  of natural origin, e.g. polysaccharides, cellulose · CPC title

• C04B22/0026

  Salt water, e.g. seawater · CPC title

• C04B24/38

  Polysaccharides or derivatives thereof {(C04B24/243 takes precedence)} · CPC title

• C04B2103/0062

  Cross-linked polymers · CPC title

• C04B28/02

  containing hydraulic cements other than calcium sulfates · CPC title