Methods of degrading filter cakes in a subterranean formation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-021/00
E21B-037/00
C09K-008/06
C09K-008/02
C09K-008/10
C09K-008/52
출원번호
US-0509411
(2006-08-24)
등록번호
US-7497278
(2009-03-03)
발명자
/ 주소
Schriener,Kirk
Munoz, Jr.,Trinidad
출원인 / 주소
Halliburton Energy Services, Inc.
대리인 / 주소
Roddy,Craig W.
인용정보
피인용 횟수 :
33인용 특허 :
139
초록▼
Many methods are presented including one that comprises: providing a well drill-in and servicing fluid comprising an aqueous fluid, a viscosifier, a fluid loss control additive, a bridging agent, and an orthoester composition; using the well drill-in and servicing fluid to drill a well bore in a sub
Many methods are presented including one that comprises: providing a well drill-in and servicing fluid comprising an aqueous fluid, a viscosifier, a fluid loss control additive, a bridging agent, and an orthoester composition; using the well drill-in and servicing fluid to drill a well bore in a subterranean formation; allowing the well drill-in and servicing fluid to establish a filter cake in at least a portion of the well bore; contacting at least a portion of the filter cake with a breaker fluid comprising an orthoester composition; and allowing at least a portion of the filter cake to degrade.
대표청구항▼
What is claimed is: 1. A method comprising: providing a well drill-in and servicing fluid comprising an aqueous fluid, a viscosifier, a fluid loss control additive, a bridging agent, and an orthoester composition; using the well drill-in and servicing fluid to drill a well bore in a subterranean fo
What is claimed is: 1. A method comprising: providing a well drill-in and servicing fluid comprising an aqueous fluid, a viscosifier, a fluid loss control additive, a bridging agent, and an orthoester composition; using the well drill-in and servicing fluid to drill a well bore in a subterranean formation; allowing the well drill-in and servicing fluid to establish a filter cake in at least a portion of the well bore; contacting at least a portion of the filter cake with a breaker fluid comprising an orthoester composition; and allowing at least a portion of the filter cake to degrade. 2. The method of claim 1 wherein the viscosifier is selected from the group consisting of a biopolymer, cellulose, a cellulose derivative, guar, a guar derivative, and a combination thereof. 3. The method of claim 1 wherein the viscosifier is present in the well drill-in and servicing fluid in an amount in the range of from about 0.2% to about 0.6% by weight. 4. The method of claim 1 wherein the fluid loss control additive is selected from the group consisting of starch, a starch ether derivative, hydroxyethylcellulose, cross-linked hydroxyethylcellulose, and a combination thereof. 5. The method of claim 1 wherein the fluid loss control additive is present in the well drill-in and servicing fluid in an amount sufficient to provide a desired degree of fluid loss control. 6. The method of claim 1 wherein the fluid loss control additive is present in the well drill-in and servicing fluid in an amount in the range of from about 0.01% to about 3% by weight. 7. The method of claim 1 wherein the bridging agent is selected from the group consisting of calcium carbonate, a magnesium compound, a chemically bonded ceramic bridging agent, and a derivative thereof. 8. The method of claim 1 wherein the bridging agent is present in the well drill-in and servicing fluid in an amount in the range of from about 0.1% to about 32% by weight. 9. The method of claim 1 wherein the orthoester composition comprises an orthoester having a structure defined by the formula: RC(OR')(OR")(OR'"), wherein R', R", and R'" are not hydrogen. 10. The method of claim 1 wherein the orthoester composition comprises an orthoester selected from the group consisting of trimethyl orthoacetate, triethyl orthoacetate, tripropyl orthoacetate, triisopropyl orthoacetate, poly(orthoacetates), trimethyl orthoformate, triethyl orthofonnate, tripropyl orthoformate, triisopropyl orthoformate, poly(orthoformates), trimethyl orthopropionate, triethyl orthopropionate, tripropyl orthopropionate, triisopropyl orthopropionate, poly(orthopropionates), an orthoester of glycerin, an orthoester of ethylene glycol, and any combination thereof. 11. A method comprising: providing a well drill-in and servicing fluid comprising an aqueous fluid, a viscosifier, a fluid loss control additive, a bridging agent, and an orthoester composition; allowing the well drill-in and servicing fluid to establish a filter cake in at least a portion of a well bore; contacting at least a portion of the filter cake with a breaker fluid comprising an orthoester composition; allowing the orthoester composition to generate an acid; and allowing at least a portion of the filter cake to degrade. 12. The method of claim 11 wherein the viscosifier is selected from the group consisting of a biopolymer, cellulose, a cellulose derivative, guar, a guar derivative, and a combination thereof. 13. The method of claim 11 wherein the fluid loss control additive is selected from the group consisting of starch, a starch ether derivative, hydroxyethylcellulose, cross-linked hydroxyethylcellulose, and a combination thereof. 14. The method of claim 1 wherein the fluid loss control additive is present in the well drill-in and servicing fluid in an amount sufficient to provide a desired degree of fluid loss control. 15. The method of claim 11 wherein the bridging agent is selected from the group consisting of calcium carbonate, a magnesium compound, a chemically bonded ceramic bridging agent, and a derivative thereof. 16. The method of claim 11 wherein the orthoester composition comprises an orthoester having a structure defined by the formula: RC(OR')(OR")(OR'"), wherein R', R", and R'" are not hydrogen. 17. The method of claim 11 wherein the orthoester composition comprises an orthoester selected from the group consisting of trimethyl orthoacetate, triethyl orthoacetate, tripropyl orthoacetate, triisopropyl orthoacetate, poly(orthoacetates), trimethyl orthoformate, triethyl orthoformate, tripropyl orthoformate, triisopropyl orthoformate, poly(orthoformates), trimethyl orthopropionate, triethyl orthopropionate, tripropyl orthopropionate, triisopropyl orthopropionate, poly(orthopropionates), an orthoester of glycerin, an orthoester of ethylene glycol, and any combination thereof. 18. A method comprising: providing a well drill-in and servicing fluid comprising an aqueous fluid, a viscosifier, a fluid loss control additive, a bridging agent, and an orthoester composition; allowing the well drill-in and servicing fluid to establish at least a portion of a filter cake in at least a portion of a well bore; contacting at least a portion of the filter cake with a breaker fluid comprising an orthoester composition; allowing the orthoester composition to generate an acid; and allowing the acid to degrade at least a portion of the filter cake. 19. The method of claim 18 wherein the orthoester composition comprises an orthoester having a structure defined by the formula: RC(OR')(OR")(OR'"), wherein R', R", and R'" are not hydrogen. 20. The method of claim 18 wherein the orthoester composition comprises an orthoester selected from the group consisting of trimethyl orthoacetate, triethyl orthoacetate, tripropyl orthoacetate, triisopropyl orthoacetate, poly(orthoacetates), trimethyl orthoformate, triethyl orthofonnate, tripropyl orthoformate, triisopropyl orthoformate, poly(orthoformates), trimethyl orthopropionate, triethyl orthopropionate, tripropyl orthopropionate, triisopropyl orthopropionate, poly(orthopropionates), an orthoester of glycerin, an orthoester of ethylene glycol, and any combination thereof.
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이 특허에 인용된 특허 (139)
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