Use of fluorocarbon surfactants to improve the productivity of gas and gas condensate wells
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09K-008/60
E21B-043/16
출원번호
UP-0185571
(2008-08-04)
등록번호
US-7772162
(2010-08-30)
발명자
/ 주소
Pope, Gary A.
Sharma, Mukul M.
Kumar, Viren
Baran, Jimmie R.
출원인 / 주소
Board of Regents, The University of Texas System
3M Innovative Properties Company
대리인 / 주소
Flores, Edwin S.
인용정보
피인용 횟수 :
28인용 특허 :
47
초록
The present invention includes composition having a nonionic, fluorinated polymeric surfactant, water and solvent. Embodiments of compositions according to the present invention are useful, for example, for recovering hydrocarbons from subterranean elastic formations.
대표청구항▼
What is claimed is: 1. A composition comprising: a nonionic fluorinated polymeric surfactant, wherein the nonionic fluorinated polymeric surfactant comprises: (a) at least one divalent unit represented by the formula: (b) a poly(alkyleneoxy) segment; wherein Rf represents a perfluoroalkyl gro
What is claimed is: 1. A composition comprising: a nonionic fluorinated polymeric surfactant, wherein the nonionic fluorinated polymeric surfactant comprises: (a) at least one divalent unit represented by the formula: (b) a poly(alkyleneoxy) segment; wherein Rf represents a perfluoroalkyl group having from 1 to 8 carbon atoms; R and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms; and n is an integer from 2 to 10; water; and at least 50 percent by weight solvent, based on the total weight of the composition. 2. The composition of claim 1, wherein the solvent is water-miscible. 3. The composition of claim 2, wherein the nonionic fluorinated polymeric surfactant has a solubility in a mixture of the water-miscible solvent and the water that decreases with an increase in temperature. 4. The composition of claim 1, wherein the composition is interactive with a hydrocarbon-bearing geological clastic formation. 5. The composition of claim 4, wherein the hydrocarbon-bearing geological clastic formation is downhole. 6. The composition of claim 1, wherein the nonionic fluorinated polymeric surfactant is preparable by copolymerization of: (a) at least one compound represented by the formula (b) at least one of a poly(alkyleneoxy) monoacrylate or diacrylate. 7. The composition of claim 6, wherein the poly(alkyleneoxy) monoacrylate comprises at least one compound represented by a formula selected from the group consisting of: wherein R1 and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms; EO represents —CH2CH2O—; PO represents —CH(CH3)CH2O—; each p is independently an integer of 1 to about 128; and each q is independently an integer of 0 to about 55. 8. The composition of claim 1, wherein the nonionic fluorinated polymeric surfactant comprises at least one divalent unit represented by a formula selected from the group consisting of: wherein R1 and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms; EO represents —CH2CH2O—; PO represents —CH(CH3)CH2O—; each p is independently an integer of 1 to about 128; and each q is independently an integer of 0 to about 55. 9. The composition of claim 1, wherein Rf has from 4 to 6 carbon atoms. 10. The composition of claim 1, wherein Rf is perfluorobutyl. 11. The composition of claim 1, wherein the solvent comprises at least one of methanol, ethanol, propanol, isopropanol, butanol, ethylene glycol, acetone, a glycol ether, supercritical carbon dioxide, or liquid carbon dioxide. 12. The composition of claim 1, wherein the solvent comprises methanol. 13. The composition of claim 1, wherein the nonionic fluorinated polymeric surfactant is free of hydrolyzable silane groups. 14. The composition of claim 1, wherein the nonionic fluorinated polymeric surfactant has a number average molecular weight in the range from 1,000 to 30,000 grams/mole. 15. A gaseous composition comprising methane and a fluorinated product resulting from at least one of hydrolysis or thermal decomposition of a nonionic fluorinated polymeric surfactant, wherein the nonionic fluorinated polymeric surfactant comprises: (a) at least one divalent unit represented by the formula: (b) a poly(alkyleneoxy) segment; wherein Rf represents a perfluoroalkyl group having from 1 to 8 carbon atoms; R and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms; and n is an integer from 2 to 10. 16. A method of making a composition, the method comprising: selecting a hydrocarbon-bearing subterranean clastic formation, the formation having a temperature, water content, and ionic strength; determining the temperature, water content, and ionic strength of the hydrocarbon-bearing subterranean clastic formation; generating a formulation comprising nonionic fluorinated polymeric surfactant and at least one of solvent or water, the formulation based at least in part on the determined temperature, water content, and ionic strength of the hydrocarbon-bearing subterranean clastic formation, wherein the nonionic fluorinated polymeric surfactant has a cloud point when placed in the hydrocarbon-bearing subterranean clastic formation that is above the temperature of the hydrocarbon-bearing subterranean clastic formation; and making a composition having the formulation. 17. The method of claim 16, wherein the composition comprises water. 18. The method of claim 16, wherein the composition comprises solvent, and wherein the solvent comprises methanol. 19. The method of claim 16, wherein the nonionic fluorinated polymeric surfactant comprises: (a) at least one divalent unit represented by the formula: (b) at least one divalent unit represented by a formula selected from the group consisting of: wherein Rf represents a perfluoroalkyl group having from 1 to 8 carbon atoms; R, R1, and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms; n is an integer from 2 to 10; EO represents —CH2CH2O—; PO represents —CH(CH3)CH2O—; each p is independently an integer of 1 to about 128; and each q is independently an integer of 0 to about 55. 20. A treated gas-bearing clastic formation penetrated by a well bore comprising a region near the well bore treated with a nonionic fluorinated polymeric surfactant, wherein the nonionic fluorinated polymeric surfactant comprises: (a) at least one divalent unit represented by the formula: (b) a poly(alkyleneoxy) segment, wherein Rf represents a perfluoroalkyl group having from 1 to 8 carbon atoms; R and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms; and n is an integer from 2 to 10. 21. The formation according to claim 20, wherein the nonionic fluorinated polymeric surfactant comprises at least one divalent unit represented by a formula selected from the group consisting of: wherein R1 and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms; EO represents —CH2CH2O—; PO represents —CH(CH3)CH2O—; each p is independently an integer of 1 to about 128; and each q is independently an integer of 0 to about 55.
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