Acidizing compositions including ampholyte polymers
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-043/16
C09K-008/12
C09K-008/588
C09K-008/36
C09K-008/64
C09K-008/82
C09K-008/68
C09K-008/72
C09K-008/88
C04B-024/16
C04B-028/02
C09K-008/035
C09K-008/42
C09K-008/467
C09K-008/512
C09K-008/52
C09K-008/62
C09K-008/80
E21B-043/26
C09K-008/74
C09K-008/76
C04B-103/00
출원번호
US-0471674
(2014-08-28)
등록번호
US-9834716
(2017-12-05)
발명자
/ 주소
Chung, HsinChen
Maxey, Jason Eric
출원인 / 주소
Halliburton Energy Services, Inc.
대리인 / 주소
Chamberlain Hrdlicka
인용정보
피인용 횟수 :
0인용 특허 :
24
초록▼
Various embodiments disclosed relate to acidizing compositions including an ampholyte polymer. Various embodiments provide a method of treating a subterranean formation. The method can include placing in a subterranean formation an ampholyte polymer including an ethylene repeating unit including a —
Various embodiments disclosed relate to acidizing compositions including an ampholyte polymer. Various embodiments provide a method of treating a subterranean formation. The method can include placing in a subterranean formation an ampholyte polymer including an ethylene repeating unit including a —C(O)NH2 group, an ethylene repeating unit including an —S(O)2OR1 group, and an ethylene repeating unit including an —N+R23X− group. At each occurrence, R1 can be independently selected from the group consisting of —H and a counterion. At each occurrence, R2 can be independently substituted or unsubstituted (C1-C20)hydrocarbyl. At each occurrence, X− can be independently a counterion.
대표청구항▼
1. A method of treating a subterranean formation, comprising: placing in the subterranean formation an acidizing composition comprising an ampholyte polymer comprising an ethylene repeating unit comprising a —C(O)NH2 group, an ethylene repeating unit comprising an —S(O)2OR1 group, and an ethylene re
1. A method of treating a subterranean formation, comprising: placing in the subterranean formation an acidizing composition comprising an ampholyte polymer comprising an ethylene repeating unit comprising a —C(O)NH2 group, an ethylene repeating unit comprising an —S(O)2OR1 group, and an ethylene repeating unit comprising an —N+R23X− group, wherein: at each occurrence, Rl is independently selected from the group consisting of —H and a counterion,at each occurrence, R2 is independently substituted or unsubstituted (C1-C20)hydrocarbyl, andat each occurrence, X−is independently a counterion,wherein the acidizing composition comprises an aqueous acid,wherein the aqueous acid comprises salt water having a total dissolved solids level of about 50,000 mg/L to about 300,000 mg/L, andwherein the pH of the acidizing composition is about −2 to about 6. 2. The method of claim 1, wherein the method comprises at least one of acid fracturing the subterranean formation and matrix acidizing the subterranean formation. 3. The method of claim 1, further comprising mixing the aqueous acid with the ampholyte polymer in the subterranean formation to produce the acidizing composition. 4. The method of claim 1, wherein the aqueous acid comprises at least one of HCl, H2SO4, citric acid, formic acid, acetic acid, hydrofluoric acid, or any combination thereof. 5. The method of claim 1, wherein the salt water has total dissolved solids level of about 125,000 mg/L to about 300,000 mg/L. 6. The method of claim 1, wherein about 0.01 wt % to about 50 wt % of the acidizing composition is the ampholyte polymer. 7. The method of claim 1, wherein the ampholyte polymer has about Zwt wt % of the ethylene repeating unit comprising the —C(O)NH2 group, about Nwt wt % of the ethylene repeating unit comprising the —S(O)2OR1 group, and about Mwt wt % of the ethylene repeating unit comprising the —N+R23X−group, wherein Zwt is about 10% to about 70%, Nwt is about 1% to about 40%, and Mwt is about 20% to about 80%. 8. The method of claim 7, wherein Zwt+Nwt+Mwt is about 100%. 9. The method of claim 1, wherein the ampholyte polymer has a molecular weight of about 100,000 g/mol to about 20,000,000 g/mol. 10. The method of claim 1, wherein the ampholyte polymer comprises repeating units having the structure: wherein: at each occurrence, R3, R4, and R5 are each independently selected from the group consisting of —H and a substituted or unsubstituted C1-C5 hydrocarbyl,at each occurrence, L1, L2, and L3 are each independently selected from the group consisting of a bond and a substituted or unsubstituted C1-C20 hydrocarbyl interrupted or terminated with 0, 1, 2, or 3 of at least one of —NR3—, —S—, and —O—,n is in a range from 4 to about 40,000, m is in a range from about 100 to about 83,000, and z is in a range from about 125 to about 200,000, andthe repeating units are in a block, alternate, or random configuration, and each repeating unit is independently in the orientation shown or in the opposite orientation. 11. The method of claim 1, wherein the ampholyte polymer comprises repeating units having the structure: wherein n is in a range from about 450 to about 14,500, m is in a range from about 4,000 to about 62,000, and z is in a range from about 8,500 to about 140,000, andwherein the repeating units are in a block, alternate, or random configuration, and each repeating unit is independently in the orientation shown or in the opposite orientation. 12. The method of claim 1, wherein the ampholyte polymer comprises repeating units having the structure: wherein n is in a range from about 450 to about 14,500, m is in a range from about 4,000 to about 62,000, and z is in a range from about 8,500 to about 140,000, andwherein the repeating units are in a block, alternate, or random configuration, and each repeating unit is independently in the orientation shown or in the opposite orientation. 13. The method of claim 1, wherein the acidizing composition further comprises a crosslinker, wherein the ampholyte polymer is a crosslinkable ampholyte polymer. 14. The method of claim 13, further comprising at least partially crosslinking the crosslinkable ampholyte polymer to provide a crosslinked ampholyte polymer. 15. A system configured to perform the method of claim 1, the system comprising: the acidizing composition comprising the ampholyte polymer; andthe subterranean formation comprising the acidizing composition therein. 16. The method of claim 1, wherein the pH of the acidizing composition is about −2 to about 4. 17. The method of claim 1, wherein the ampholyte polymer has a higher viscosity as compared to an ampholyte polymer in a composition having a pH of 7 or greater. 18. A method of treating a subterranean formation, comprising: placing in a subterranean formation an acidizing composition comprising an ampholyte polymer comprising repeating units having the structure: wherein: at each occurrence, R1 is independently selected from the group consisting of —H and a counterion,the repeating units are in a block, alternate, or random configuration, and each repeating unit is independently in the orientation shown or in the opposite orientation,n is in a range from 4 to about 40,000, m is in a range from about 100 to about 83,000, and z is in a range from about 125 to about 200,000,the ampholyte polymer has a molecular weight of about 100,000 g/mol to about 20,000,000 g/mol, andthe ampholyte polymer has about 30 wt % to about 50 wt % of the ethylene repeating unit comprising the —C(O)NH2 group, about 5 wt % to about 15 wt % of the ethylene repeating unit comprising the —S(O)2OR1 group, and about 40 wt % to about 60 wt % of the ethylene repeating unit comprising the —N+(CH3)3X− group; anda downhole fluid comprising at least one fluid selected from the group consisting of a stimulation fluid, a clean-up fluid, a remedial treatment fluid, a pill, a diverting fluid, and an acidizing fluid;wherein about 0.001 wt % to about 30 wt % of the acidizing composition is the ampholyte polymer,wherein the acidizing composition comprises an aqueous acid,wherein the aqueous acid comprises salt water having a total dissolved solids level of about 50,000 mg/L to about 300,000 mg/L, andwherein the pH of the acidizing composition is about −2 to about 6. 19. A method of treating a subterranean formation, comprising: placing in a subterranean formation an acidizing composition comprising an ampholyte polymer comprising an ethylene repeating unit comprising a —C(O)NH2 group, an ethylene repeating unit comprising an —S(O)2OR1 group, and an ethylene repeating unit comprising an —N+R23X− group, wherein: at each occurrence, R1 is independently selected from the group consisting of —H and a counterion,at each occurrence, R2 is independently substituted or unsubstituted (C1-C20)hydrocarbyl, andat each occurrence, X− is independently a counterion,wherein the acidizing composition comprises an aqueous acid,wherein the aqueous acid comprises salt water having a total dissolved solids level of about 50,000 mg/L to about 30,000 mg/L, andwherein the pH of the acidizing composition is about 0 to about 6.
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