Methods for treating intervals of a subterranean formation having variable permeability
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-043/16
E21B-033/13
출원번호
UP-0655443
(2007-01-19)
등록번호
US-7730950
(2010-06-29)
발명자
/ 주소
Nguyen, Philip D.
Brown, David L.
출원인 / 주소
Halliburton Energy Services, Inc.
대리인 / 주소
Kent, Robert A.
인용정보
피인용 횟수 :
10인용 특허 :
202
초록▼
Methods of using water-soluble hydrophobically modified polymers to treat intervals of a subterranean formation having variable permeabilities. An exemplary embodiment provides a method of treating an interval of a subterranean formation having a permeability that varies. The method comprises contac
Methods of using water-soluble hydrophobically modified polymers to treat intervals of a subterranean formation having variable permeabilities. An exemplary embodiment provides a method of treating an interval of a subterranean formation having a permeability that varies. The method comprises contacting the interval with a water-soluble hydrophobically modified polymer capable of selectively reducing the effective permeability of the interval to water without a comparable reduction of the effective permeability of the interval to hydrocarbons. The hydrophobically modified polymer modifies the interval to have a more uniform permeability without substantially preventing the flow of fluids through the interval. The method further comprises introducing a treatment fluid into the interval. The more uniform permeability of the interval allows for a more uniform treatment of the interval by the treatment fluid than would be allowed without treatment of the interval with the hydrophobically modified polymer.
대표청구항▼
What is claimed is: 1. A method of treating an interval of a subterranean formation having a first portion with a first water permeability and a second portion with a second water permeability wherein the first water permeability is not the same as the second water permeability, the method comprisi
What is claimed is: 1. A method of treating an interval of a subterranean formation having a first portion with a first water permeability and a second portion with a second water permeability wherein the first water permeability is not the same as the second water permeability, the method comprising: contacting the first portion and the second portion of the interval with a water-soluble hydrophobically modified polymer capable of selectively reducing the effective permeability of the portion to water without a comparable reduction of the effective permeability of the interval to hydrocarbons, wherein the hydrophobically modified polymer modifies both the first water permeability and the second water permeability to a more uniform, third water permeability, and the third permeability of the interval to water is different from the first permeability by an amount up to about 40%; and treating the interval with a treatment fluid, wherein the first portion and the second portion both exhibit a more uniform, third permeability, thus allowing for a more uniform treatment of the interval by the treatment fluid than would be allowed without treatment of the interval with the hydrophobically modified polymer. 2. The method of claim 1, wherein the hydrophobically modified polymer contacts the at least one portion of the interval such that the effective permeability of the interval to hydrocarbons is modified. 3. The method of claim 1, wherein the hydrophobically modified polymer comprises a polymer containing a backbone, the backbone comprising polar heteroatoms. 4. The method of claim 1, wherein the hydrophobically modified polymer was synthesized from a hydrophilic polymer, the hydrophilic polymer comprising reactive amino groups in the polymer backbone or as pendant groups. 5. The method of claim 1, wherein the hydrophobically modified polymer was synthesized from a hydrophilic polymer, the hydrophilic polymer comprising dialkyl amino pendant groups. 6. The method of claim 1, wherein the hydrophobically modified polymer was synthesized from a hydrophilic polymer, the hydrophilic polymer comprising a dimethylamino pendant group and a monomer selected from the group consisting of dimethylaminoethyl methacrylate and dimethylaminopropyl methacrylamide. 7. The method of claim 1, wherein the hydrophobically modified polymer has an alkyl chain length of from about 12 carbons to about 18 carbons. 8. The method of claim 1, wherein the hydrophobically modified polymer comprises an amino methacrylate/alkyl amino methacrylate copolymer. 9. The method of claim 1, wherein the hydrophobically modified polymer comprises a hydrophobically modified polymer selected from the group consisting of an acrylamide/octadecyldimethylammoniumethyl methacrylate bromide copolymer; a dimethylaminoethyl methacrylate/vinyl pyrrolidone/hexadecyldimethylammoniumethyl methacrylate bromide terpolymer; an acrylamide/2-acrylamido-2-methyl propane sulfonic acid/2-ethylhexyl methacrylate terpolymer; and a dimethylaminoethyl methacrylate/hexadecyl-dimethylammoniumethyl methacrylate bromide copolymer. 10. The method of claim 1, wherein the treatment fluid comprises a consolidating fluid. 11. The method of claim 1 wherein the water-soluble hydrophobically modified polymer is present in the treatment fluid. 12. The method of claim 1, wherein the first portion, the second portion, or both comprise a water-producing interval and wherein the treatment fluid comprises a consolidating fluid introduced into the water-producing interval through a well bore to reduce the production of water from the water-producing interval. 13. The method of claim 12, wherein the hydrophobically modified polymer contacts the water producing interval such that the effective permeability of the water producing interval to hydrocarbons is modified. 14. The method of claim 12, comprising shutting in the well bore after introduction of the consolidating fluid into the well bore. 15. The method of claim 12, wherein the consolidating fluid comprises at least one fluid selected from the group consisting of a tackifying fluid, a resin composition, and gelable composition. 16. The method of claim 12, wherein the water-soluble hydrophobically modified polymer is present in the consolidating fluid. 17. The method of claim 1 wherein the interval comprises a weakly consolidated interval; wherein the treatment fluid comprises a consolidating fluid introduced into the weakly consolidated interval to reduce fines migration in the weakly consolidated interval. 18. The method of claim 17, wherein the hydrophobically modified polymer contacts a portion of the weakly consolidated interval near a well bore such that the effective permeability of the portion near the well bore to hydrocarbons is modified. 19. The method of claim 17, comprising shutting in the well bore after introduction of the consolidating fluid into the weakly consolidated interval. 20. The method of claim 17, comprising introducing an after-flush fluid into the weakly consolidated interval so at to restore permeability to the weakly consolidated interval, wherein the after-flush fluid is introduced after the consolidating fluid is introduced. 21. The method of claim 17, wherein the consolidating fluid comprises at least one fluid selected from the group consisting of a tackifying fluid, a resin composition, and gelable composition. 22. The method of claim 17, wherein the water-soluble hydrophobically modified polymer is present in the consolidating fluid. 23. The method of claim 1, wherein the water-soluble hydrophobically modified polymer comprises a polymer comprising hydrophilic monomers and hydrophobic compounds, wherein the mole ratio of hydrophilic monomer to hydrophobic compound in the polymer is in the range of from about 99.98:0.02 to about 90:10.
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