Quaternary ammonium salts as thickening agents for aqueous systems
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09K-008/68
C09K-008/60
E21B-043/26
E21B-043/25
B01F-003/08
B01F-017/00
출원번호
US-0070282
(2000-09-01)
등록번호
US-7358215
(2008-04-15)
국제출원번호
PCT/US00/024142
(2000-09-01)
§371/§102 date
20020415
(20020415)
국제공개번호
WO01/018147
(2001-03-15)
발명자
/ 주소
Subramanian,Shankar
Burgazli,Cenk
Zhu,Yun Peng
Zhu,Shawn
Feuerbacher,Dave
출원인 / 주소
Akzo Nobel Surface Chemistry LLC
대리인 / 주소
Mancini,Ralph J.
인용정보
피인용 횟수 :
3인용 특허 :
92
초록
This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications. The quaternary ammonium salts of the present invention exhibit improved gelling characteristics.
대표청구항▼
The invention claimed is: 1. A method of fracturing a subterranean formation comprising the steps of: I) providing a thickened aqueous based hydraulic fracturing fluid, comprising: a) an aqueous medium; and b) about 0.1 wt-% to about 4 wt-% of at least one cationic surfactant having the following g
The invention claimed is: 1. A method of fracturing a subterranean formation comprising the steps of: I) providing a thickened aqueous based hydraulic fracturing fluid, comprising: a) an aqueous medium; and b) about 0.1 wt-% to about 4 wt-% of at least one cationic surfactant having the following general structure: wherein R1 is alkyl amine alkylene, or alkyl amido alkylene, R2 and R3 are each alkyl, hydroxyl alkyl, polyalkoxy with the degree of polymerization ranging from 2 to 30, hydroxyl alkyl sulfonate, alkyl sulfonate or alkylarylsulfonate; R4 is hydrocarbon, saturated or unsaturated; or wherein any two of R2, R3 and R4, together with the nitrogen atom to which they are attached, form a heterocyclic ring; and X is selected from the group consisting of halides; oxo ions of phosphorus, sulfur or chloride; and organic anions; and c) at least one additive selected from organic salts, inorganic salts, organic acids, alcohols, and mixtures thereof; and II. pumping the aqueous fracturing fluid through a wellbore and into a subterranean formation at a pressure sufficient to fracture the formation. 2. The method of claim 1 wherein said cationic surfactant has the following general structure: wherein R is saturated or unsaturated alkyl and y is an integer from 1 to 12. 3. The method of claim 2 wherein R has from about 6 to about 26 carbon atoms. 4. The method of claim 2 wherein R has from about 12 to about 22 carbon atoms. 5. The method of claim 2 wherein R is erucyl. 6. The method of claim 2 wherein y is 1. 7. The method of claim 2 wherein said cationic surfactant is isostearylamidopropylmorpholine. 8. The method of claim 1 wherein said fracturing fluid comprises at least one additive selected from organic acids, and/or organic salts. 9. The method of claim 8 wherein said additive comprises at least one aromatic group. 10. The method of claim 8 wherein said additive is an aromatic sulfonate. 11. The method of claim 1 wherein said aqueous based hydraulic fracturing fluid has thermal stability of greater than about 85�� C. 12. The method of claim 1 wherein said additive is selected from sulfates, sulfonates, or salicylates. 13. The method of claim 1 wherein said gel has a thermal stability up to temperatures of about 110�� C. 14. The method of claim 1 wherein said fracturing fluid has thermal stability of greater than about 90�� C. 15. The method of claim 1 wherein said fracturing fluid comprises from about 0.05% to about 10% by weight of said cationic surfactant. 16. The method of claim 1 wherein said cationic surfactant is erucyl amidopropyltrimethyl ammonium quaternary salt, and said additive is sodium xylene sulfonate. 17. The method of claim 1 wherein in R1, the alkyl group contains 1-26 carbon atoms and the alkylene group contains 1-8 carbon atoms. 18. An oil field high brine completion fluid comprising: a) about 30 wt-% to about 70 wt-% of at least one inorganic or organic salt; and b) about 0.1 wt-% to about 4 wt-% of at least one cationic surfactant having the following general structure: wherein R1 is alkyl amine alkylene, or alkyl amido alkylene; R2 and R3 are each alkyl, hydroxyl alkyl, polyalkoxy with the degree of polymerization ranging from 2 to 30, hydroxyl alkyl sulfonate, alkyl sulfonate or alkylarysulfonate; R4 is hydrocarbon, saturated or unsaturated; or wherein any two of R2, R3, and R4 together with the nitrogen atom to which they are attached, from a heterocyclic ring; and X is selected from the group consisting of halides; oxo ions of phosphorous, sulfur or chloride; and organic anions. 19. The fluid of claim 18 further comprising at least one additive selected from inorganic salts, organic salts, organic acids, alcohols, or mixtures thereof. 20. The high brine completion fluid of claim 19 wherein said cationic surfactant is erucyl amidopropyltrimethyl ammonium quaternary salt, and said additive is sodium xylene sulfonate. 21. The fluid of claim 18 wherein the viscosity of said fluid increases when the temperature is increased and decreases when the temperature is decreased. 22. The completion fluid of claim 18 wherein in R1, the alkyl group contains 1-26 carbon atoms and the alkylene group contains 1-8 carbon atoms. 23. A well drilling operation, coil-tubing operation, construction operation, or mining operation which comprises suspending particles in a thickened aqueous liquid, the method comprising the steps of: I) providing an aqueous medium; and II) adding to said aqueous medium, an effective amount of at least one cationic surfactant and at least one additive sufficient to increase the viscosity of said aqueous medium wherein said cationic surfactant is erucyl amidopropyltrimethyl ammonium quaternary salt, and said additive is sodium xylene sulfonate, and wherein said aqueous liquid is sufficiently thickened to suspend solid particulate matter, and wherein said particulate matter is cutting material, proppant material or mixtures thereof.
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