[미국특허]
Composition for use in sealing a porous subterranean formation, and methods of making and using
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09K-007/02
C09K-007/00
E21B-033/13
출원번호
US-0308114
(2002-12-03)
발명자
/ 주소
Myers, Kent R.
Brown, Richard K.
Krause, Stewart W.
Parekh, Shobha B.
Stichman, Robert W.
출원인 / 주소
Wyo-Ben, Inc.
대리인 / 주소
Clark & Brody
인용정보
피인용 횟수 :
18인용 특허 :
48
초록▼
A composition for sealing porous subterranean formations comprises a mixture of a water-swellable clay and a water insoluble, water absorbent, water-swellable polymer, wherein the mixture is coated with a material that is resistant to penetration by water. The water penetration resistant material he
A composition for sealing porous subterranean formations comprises a mixture of a water-swellable clay and a water insoluble, water absorbent, water-swellable polymer, wherein the mixture is coated with a material that is resistant to penetration by water. The water penetration resistant material helps the delay the onset of swelling of the clay and polymer until it reaches the formations intended for sealing. Mixing the clay with the water-swellable polymer prior to coating assists in coating of the water-swellable polymer with the water penetration resistant material. The coated mixture can be suspended in an aqueous liquid, and then pumped into a subterranean cavity to seal porous formations therein.
대표청구항▼
1. A composition for use in sealing a porous subterranean formation comprising a mixture of effective amounts of water swellable clay and a water-insoluble, water-absorbent, water-swellable polymer capable of penetrating into the porous subterranean formation and forming a durable, hydrostatic press
1. A composition for use in sealing a porous subterranean formation comprising a mixture of effective amounts of water swellable clay and a water-insoluble, water-absorbent, water-swellable polymer capable of penetrating into the porous subterranean formation and forming a durable, hydrostatic pressure-resistant seal that substantially reduces or eliminates loss of drilling or excavation fluids, each of the water swellable clay and the water-insoluble, water-absorbent, water-swellable polymer having an external coating consisting of an effective amount of a material capable of retarding the rate of penetration of water through the coating. 2. The composition of claim 1, wherein the material capable of retarding the rate of penetration of water through the external coating comprises a liquid high molecular weight water soluble polymer. 3. The composition of claim 1, wherein a mixture of the water swellable clay and the water insoluble, water absorbent, water swellable polymer of the composition comprises between 0.1 and 99.9% by weight of the clay and between 0.1 and 99.9% of the water swellable polymer. 4. The composition of claim 3, wherein the clay ranges between 80 and 99% and the water-insoluble, water-absorbent, water swellable polymer ranges between 1 and 20%. 5. The composition of claim 1, wherein the water-insoluble, water-absorbent, water-swellable polymer is a cross linked polyacrylamide polymer. 6. The composition of claim 2, wherein the effective amount of the external coating is based on 0.01 to 15 gallons of the water penetration resistant liquid material per 2000 pounds of a dry mixture of the clay and water-insoluble, water-absorbent, water swellable polymer. 7. The composition of claim 1, wherein the clay is selected from the group consisting of bentonite, montmorillonite, hectorite, nontronite, saponite, beidellite, attapulgite, and sepiolite. 8. The composition of claim 2, wherein the liquid high molecular weight water soluble polymer is a polyacrylamide or a polyacrylamide-polyacrylate co-polymer or a mixture of the two. 9. The composition of claim 1, wherein the clay and the water-insoluble, water-absorbent, water swellable polymer have a particle size of 200 mesh (ASTM) or greater. 10. The composition of claim 1, wherein the coated mixture contains an effective amount of water insoluble fibrous material to enhance integrity of a seal formed by use of the coated mixture in a subterranean formation. 11. A method of making a coated mixture for use in sealing a porous subterranean formation comprising:a) forming a dry mixture of an effective amount of a particulate water swellable clay with an effective amount of a particulate water insoluble, water absorbent, water swellable polymer, the effective amounts being capable of penetrating into the porous subterranean formation and forming a durable, hydrostatic pressure-resistant seal that substantially reduces or eliminates loss of drilling or excavation fluids; andb) coating the clay and water-insoluble, water-absorbent, water-swellable polymer particles with an effective amount of a material capable of retarding the rate of water penetration through the coating to form the coated mixture. 12. The method of claim 11, wherein the material capable of retarding the rate of water penetration through the coating comprises a liquid high molecular weight water soluble polymer. 13. The method of claim 11 wherein the effective amount of the external coating is based on 0.01 to 15 gallons of the water penetration resistant liquid material per 2000 pounds of the dry mixture. 14. The method of claim 11, wherein the mixture of the water swellable clay and the water insoluble, water absorbent, water swellable polymer of the composition comprises between 0.1 and 99.9% by weight of the clay and between 0.1 and 99.9% of the water swellable polymer. 15. The method of claim 14, wherein the clay ranges between 80 and 99% and the water-insoluble, water-absorbent, water swellable p olymer ranges between 1 and 20%. 16. The method of claim 11, further comprising adding an effective amount of water insoluble fibrous material to the coated mixture to enhance the integrity of a seal formed by a use of the coated mixture in a subterranean formation. 17. The method of claim 11, wherein the water-insoluble, water-absorbent, water swellable polymer is a cross linked polyacrylamide polymer. 18. The method of claim 11, wherein the clay and the water-insoluble, water-absorbent, water swellable polymer have a particle size of 200 mesh (ASTM) or greater. 19. The method of claim 12, wherein the liquid high molecular weight water soluble polymer is a polyacrylamide or a polyacrylamide-polyacrylate co-polymer or a mixture of the two. 20. The method of claim 11, wherein the clay is selected from the group consisting of bentonite, montmorillonite, hectorite, nontronite, saponite, beidellite, attapulgite, and sepiolite. 21. A method of sealing a porous formation in a subterranean cavity comprising:a) suspending an effective amount of the coated mixture of claim 1 in an aqueous-based liquid to form a fluid suspension;b) introducing the fluid suspension into a subterranean cavity wherein the clay and water-insoluble, water-absorbent, water swellable polymer seal the porous formation. 22. The method of claim 21, wherein the aqueous based liquid is one of water or a water-based drilling fluid. 23. The method of claim 22, wherein the drilling fluid comprises water and bentonite. 24. The method of claim 21, wherein the fluid suspension is introduced either generally vertically or generally horizontally in subterranean cavity. 25. The composition of claim 6, wherein 1.0 to 6.0 gallons of the water penetration resistant liquid material are used per 2000 pounds of the dry mixture. 26. The composition of claim 9, wherein the clay and the water-insoluble, water-absorbent, water swellable polymer have a particle size of about 100 mesh (ASTM) to 0.25 inch. 27. The composition of claim 26, wherein the clay and the water-insoluble, water-absorbent, water swellable polymer have a particle size of about 40 mesh (ASTM) to 8 mesh (ASTM). 28. The composition of claim 10, wherein the fibrous material is comprised of one or more of polyethylene, polypropylene, nylon, rayon, polyester, hemp, cotton, wool, disassociated wood fibers and fiberglass. 29. The method of claim 13, wherein 1.0 to 6.0 gallons of the water penetration resistant liquid material are used per 2000 pounds of the dry mixture. 30. The method of claim 16, wherein the fibrous material is comprised of one or more of polyethylene, polypropylene, nylon, rayon, polyester, hemp, cotton, wool, disassociated wood fibers and fiberglass. 31. The method of claim 18, wherein the clay and the water-insoluble, water-absorbent, water swellable polymer have a particle size of about 100 mesh (ASTM) to 0.25 inch. 32. The method of claim 31, wherein the clay and the water-insoluble, water-absorbent, water swellable polymer have a particle size of about 40 mesh (ASTM) to 8 mesh (ASTM).
Sydansk Robert D. (Littleton CO) Argabright Perry A. (Larkspur CO), Conformance improvement in a subterranean hydrocarbon-bearing formation using a crosslinked polymer.
Sydansk Robert D. (Littleton CO) Argabright Perry A. (Larkspur CO), Conformance improvement in a subterranean hydrocarbon-bearing formation using a polymer gel.
Delhommer Harold J. (Houston TX) Walker Clarence O. (Richmond TX), Encapsulated oil absorbent polymers as lost circulation additives for oil based drilling fluids.
Delhommer Harold J. (Houston TX) Walker Clarence O. (Richmond TX), Method for controlling lost circulation of drilling fluids with hydrocarbon absorbent polymers.
McDonald Charles J. (Midland MI) Van Landingham John V. (Sapulpa OK) Givens Steven P. (Midland MI), Method for controlling permeability of subterranean formations.
McDonald Charles J. (Midland MI) Van Landingham John V. (Sapulpa OK) Givens Steven P. (Midland MI), Method for controlling permeability of subterranean formations.
Hoskin Dennis H. (Lawrenceville NJ) Mitchell Thomas O. (Hopewell Township ; Mercer County NJ) Shu Paul (West Windsor NJ), Oil reservoir permeability profile control with crosslinked welan gum biopolymers.
Hoskin Dennis H. (Lawrenceville NJ) Mitchell Thomas O. (Hopewell Township ; Mercer County NJ) Shu Paul (West Windsor NJ), Oil reservoir permeability profile control with crosslinked welan gum biopolymers.
Sydansk Robert D. (Littleton CO), Selective placement of a permeability-reducing material to inhibit fluid communication between a near well bore interval.
Keener Ivian G. (Houston TX) Newlove John C. (Kingwood TX) Portnoy Robert C. (Houston TX) Fehler Daniel F. (Houston TX) Pober Kenneth W. (Houston TX), Use of mono and polyalkylene glycol ethers as agents for the release of differentially stuck drill pipe.
Creel, Prentice G.; Boatman, Charles L.; Tate, Richard H.; Dalrymple, Eldon Dwyann; Luscombe, Stephen P.; Eubank, John L., Compositions and methods of cementing in subterranean formations using a swelling agent to inhibit the influx of water into a cement slurry.
Reddy,B. Raghava; Zamora,Frank; Venditto,James J.; Sepulvado,Robert J., Method of using a swelling agent to prevent a cement slurry from being lost to a subterranean formation.
Creel, Prentice G.; Reddy, B. Raghava; Dalrymple, Eldon D.; Abdulkadir, Ramzi I.; Venditto, James J.; Crook, Ronald J., Methods of delivering material downhole.
Santra, Ashok K.; Reddy, B. Raghava; Zamora, Frank; Gomez, Giddo Antonio Ocana; Morgan, Ronnie G.; Savery, Mark R., Methods of generating a gas in a plugging composition to improve its sealing ability in a downhole permeable zone.
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