Methods and compositions for use in oil and/or gas wells
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09K-008/52
C09K-008/58
E21B-043/26
C09K-008/584
C09K-008/60
C09K-008/92
출원번호
US-0644351
(2015-03-11)
등록번호
US-9868893
(2018-01-16)
발명자
/ 주소
Saboowala, Hasnain
Hill, Randal M.
Fursdon-Welsh, Angus
출원인 / 주소
Flotek Chemistry, LLC
대리인 / 주소
Wolf, Greenfield & Sacks, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
180
초록▼
Methods and compositions comprising an emulsion or a microemulsion for use in various aspects of the life cycle of an oil and/or gas well are provided. In some embodiments, the emulsion or the microemulsion comprises water, a solvent, and a surfactant, and optionally, one or more additives. In some
Methods and compositions comprising an emulsion or a microemulsion for use in various aspects of the life cycle of an oil and/or gas well are provided. In some embodiments, the emulsion or the microemulsion comprises water, a solvent, and a surfactant, and optionally, one or more additives. In some embodiments, methods for preventing, reducing, or eliminating a crude oil emulsion in an oil and/or gas well are provided.
대표청구항▼
1. A method of preventing, reducing, or eliminating a crude oil emulsion in an oil and/or gas well having a wellbore, comprising: injecting a solution comprising an emulsion or a microemulsion into the wellbore of an oil and/or gas well,wherein the crude oil emulsion is prevented, reduced, or elimin
1. A method of preventing, reducing, or eliminating a crude oil emulsion in an oil and/or gas well having a wellbore, comprising: injecting a solution comprising an emulsion or a microemulsion into the wellbore of an oil and/or gas well,wherein the crude oil emulsion is prevented, reduced, or eliminated following injection of the solution; andwherein the emulsion or the microemulsion comprises a surfactant, a first solvent, and a silicone solvent, wherein the silicone solvent is a volatile linear or cyclic siloxane having the chemical formula (CH3)3SiO—((CH3)2SiO)n—Si(CH3)3 or cyclic [(CH3)2SiO]m, wherein n is 0 to 5 and m is 4 or 5, wherein the silicone solvent has a molecular weight less than about 800 g/mol, wherein the surfactant comprises a nonionic, an anionic, or a cationic surfactant, wherein the cationic surfactant comprises a quaternary ammonium salt. 2. The method as in claim 1, wherein the silicone solvent is selected from the group consisting of hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, 2.0 cSt trimethylsiloxy terminated polydimethylsiloxane, 3.0 cSt trimethylsiloxy terminated polydimethylsiloxane, 5.0 cSt trimethylsiloxy terminated polydimethylsiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and other oligomeric methylated siloxanes. 3. The method as in claim 1, wherein the emulsion or the microemulsion is diluted and/or combined with a fluid prior to and/or during injection. 4. The method as in claim 1, wherein the silicone solvent comprises decamethylcyclopentasiloxane. 5. The method as in claim 1, wherein the emulsion or the microemulsion further comprises a co-solvent and the emulsion or the microemulsion comprises between about 3 wt % and about 50 wt % of the combination of the first solvent and the silicone solvent, between about 5 wt % and about 45 wt % of the co-solvent, and between about 10 wt % and about 50 wt % of the surfactant, versus the total emulsion or microemulsion composition. 6. The method as in claim 5, wherein the co-solvent is selected from the group consisting of methanol, ethanol, isopropyl alcohol, ethylene glycol, propylene glycol, dipropylene glycol monomethyl ether, triethylene glycol, and ethylene glycol monobutyl ether. 7. The method as in claim 5, wherein the co-solvent is present in an amount between about 5 wt % and about 35 wt % versus the total emulsion or microemulsion composition. 8. The method as in claim 1, wherein the emulsion or microemulsion comprises the first solvent and the silicone solvent in an amount between about 3 wt % and about 50 wt % versus the total emulsion or microemulsion composition. 9. The method as in claim 1, wherein the ratio of the first solvent and the silicone solvent present in the emulsion or the microemulsion composition is between about 10:0.1 to about 10:4. 10. The method as in claim 1, wherein the first solvent comprises a terpene. 11. The method as in claim 1, wherein the first solvent comprises octane. 12. The method as in claim 1, wherein the surfactant is present in an amount between about 15 wt % and about 30 wt % versus the total emulsion or microemulsion composition. 13. The method as in claim 1, wherein the emulsion or the microemulsion comprises a first type of surfactant and a second type of surfactant. 14. The method as in claim 1, wherein the emulsion or the microemulsion comprises an alcohol. 15. The method as in claim 14, wherein the alcohol is present in an amount between about 1 wt % and about 50 wt % versus the total emulsion or microemulsion composition. 16. The method as in claim 14, wherein the alcohol comprises isopropanol. 17. The method as in claim 1, wherein the emulsion or the microemulsion comprises a freezing point depression agent. 18. The method as in claim 17, wherein the emulsion or the microemulsion comprises a first type of freezing point depression agent and a second type of freezing point depression agent. 19. The method as in claim 17, wherein the freezing point depression agent is present in an amount between about 0 wt % and about 25 wt % versus the total emulsion or microemulsion composition. 20. The method as in claim 17, wherein the freezing point depression agent comprises an alkylene glycol, an alcohol, or a salt. 21. The method as in claim 1, wherein the emulsion or the microemulsion further comprises at least one other additive. 22. The method as in claim 21, wherein the at least one other additive is selected from the group consisting of salts and acids. 23. The method as in claim 21, wherein the at least one other additives is present in an amount between about 1 wt % and about 30 wt % versus the total emulsion or microemulsion composition. 24. The method as in claim 1, wherein the solution comprising the emulsion or the microemulsion is formed by diluting the emulsion or the microemulsion with a fluid utilized in the life cycle of an oil and/or gas well. 25. The method as in claim 24, wherein the emulsion or the microemulsion is present in an amount between about 0.5 gallons per thousand and about 100 gallons per thousand of the fluid utilized in the life cycle of an oil and/or gas well. 26. The method as in claim 1, wherein the emulsion or the microemulsion is injected into a wellbore via straight tubing or coiled tubing. 27. The method as in claim 1, wherein the crude oil emulsion is present in the oil and/or gas well prior to injection of the solution, and wherein the crude oil emulsion is reduced or eliminated following injection of the solution. 28. The method as in claim 1, wherein the silicone solvent has a molecular weight between about 167 g/mol and about 770 g/mol. 29. The method as in claim 1, wherein the silicone solvent has a molecular weight of less than about 550 g/mol. 30. The method as in claim 1, wherein the emulsion or the microemulsion includes a water continuous phase.
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이 특허에 인용된 특허 (180)
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