Methods of diverting treating fluids in subterranean zones and degradable diverting materials
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-033/138
E21B-037/00
E21B-043/25
E21B-043/27
출원번호
US-0609031
(2003-06-27)
발명자
/ 주소
Munoz, Jr.,Trinidad
Todd,Bradley L.
출원인 / 주소
Halliburton Energy Services, Inc.
대리인 / 주소
Baker Botts
인용정보
피인용 횟수 :
90인용 특허 :
103
초록▼
Methods of diverting treating fluids in subterranean zones penetrated by well bores are provided. The methods basically comprise the following steps. A degradable particulate diverting material is placed in a subterranean zone that contains releasable water. A treating fluid is then introduced into
Methods of diverting treating fluids in subterranean zones penetrated by well bores are provided. The methods basically comprise the following steps. A degradable particulate diverting material is placed in a subterranean zone that contains releasable water. A treating fluid is then introduced into the subterranean zone which is diverted by the degradable particulate diverting material therein. Thereafter, the degradable particulate diverting material is allowed to at least partially degrade in the presence of the released water in the subterranean zone.
대표청구항▼
What is claimed is: 1. An improved method of diverting a treating fluid in a subterranean zone penetrated by a well bore comprising the steps of: (a) placing a degradable particulate diverting material comprising a degradable particulate in said subterranean zone; (b) introducing a treating fluid i
What is claimed is: 1. An improved method of diverting a treating fluid in a subterranean zone penetrated by a well bore comprising the steps of: (a) placing a degradable particulate diverting material comprising a degradable particulate in said subterranean zone; (b) introducing a treating fluid into said subterranean zone; (c) allowing the degradable particulate diverting material to divert at least a portion of the treating fluid into a particular region in the subterranean zone; (d) introducing a source of releasable water into said subterranean zone; (e) allowing the source of releasable water to release water; and (f) allowing the degradable particulate diverting material to at least partially degrade in the presence of the released water in the subterranean zone. 2. The method of claim 1 wherein the treating fluid introduced in accordance with step (b) is selected from the group consisting of water based foams, fresh water, salt water, formation water and various aqueous solutions. 3. The method of claim 2 wherein the treating fluid introduced in accordance with step (b) is selected from the group consisting of aqueous acid solutions, aqueous scale inhibitor material solutions, aqueous water blocking material solutions, aqueous clay stabilizer solutions, aqueous chelating agent solutions, aqueous surfactant solutions and aqueous paraffin removal solutions. 4. The method of claim 1 wherein the source of releasable water comprises a hydrated organic or inorganic compound. 5. A method of claim 4 wherein the hydrated organic or inorganic compound is selected from the group consisting of sodium acetate trihydrate, L-tartaric acid disodium salt dihydrate, sodium citrate dihydrate, sodium tetraborate decahydrate, sodium hydrogen phosphate heptahydrate, sodium phosphate dodecahydrate, amylose, starch-based hydrophilic polymers, and cellulose-based hydrophilic polymers. 6. The method of claim 1 wherein the degradable particulate comprises a degradable polymer. 7. The method of claim 6 wherein the degradable polymer is selected from the group consisting of polysaccharides, chitins, chitosans, proteins, aliphatic polyesters, poly(lactides), poly(glycolides), poly(ε-carprolactones), poly(hydroxybutyrates), poly(anhydrides), aliphatic polycarbonates, poly(orthoesters), poly(amino acids), poly(ethylene oxides), polyphoshazenes, and mixtures thereof. 8. An improved method of diverting a treating fluid in a subterranean zone penetrated by a well bore comprising the steps of: (a) placing a self-degradable particulate diverting material in said subterranean zone, the self-degradable particulate diverting material comprising a mixture of a degradable particulate and a hydrated organic or inorganic compound solid; (b) introducing a treating fluid into the subterranean zone; (c) allowing the self-degradable particulate diverting material to divert the treating fluid into a particular region in the subterranean zone; (d) allowing the hydrated organic or inorganic solid compound to release water; and (e) allowing the degradable particulate in said self-degradable particulate diverting material to at least partially degrade in water released by the hydrated organic or inorganic solid compound. 9. The method of claim 8 wherein the degradable particulate comprises a degradable polymer. 10. The method of claim 9 wherein the degradable polymer is selected from the group consisting of polysaccharides, chitins, chitosans, proteins, aliphatic polyesters, poly(lactides), poly(glycolides), poly(ε-carprolactones), poly(hydroxybutyrates), poly(anhydrides), aliphatic polycarbonates, poly(orthoesters), poly(amino acids), poly(ethylene oxides), polyphosphazenes, and mixtures thereof. 11. The method of claim 8 wherein the degradable particulate further comprises a plasticizer. 12. The method of claim 8 wherein the degradable particulate comprises poly(lactic acid). 13. The method of claim 8 wherein the degradable particulate comprises a stereoisomer of a poly(lactide). 14. The method of claim 8 wherein the degradable particulate comprises poly(phenyllactide). 15. The method of claim 8 wherein the hydrated organic or inorganic solid compound comprises hydrates of organic acids or organic acid salts. 16. The method of claim 15 wherein the hydrafted organic or inorganic solid compound is selected from the group consisting of sodium acetate trihydrate, L-tartaric acid disodium salt dihydrate, sodium citrate dihydrate, sodium tetraborate decahydrate, sodium hydrogen phosphate heptahydrate, sodium phosphate dodecahydrate, amylose, starch-based hydrophilic polymers, and cellulose-based hydrophilic polymers. 17. The method of claim 8 wherein the organic or inorganic compound comprises sodium acetate trihydrate and the degradable particulate comprises poly(lactic acid). 18. The method of claim 8 wherein the degradable particulate comprises lactide units, the lactide units and the released water of the organic or inorganic compound being present in the mixture in equal molar amounts. 19. The method of claim 8 wherein the treating fluid introduced in accordance with step (b) is selected from the group consisting of oils, oil-water emulsions, oil based foams, water based foams, fresh water, salt water, formation water and various aqueous solutions. 20. The method of claim 19 wherein the treating fluid is an aqueous treating fluid solution selected from the group consisting of aqueous acid solutions, aqueous scale inhibitor material solutions, aqueous water blocking material solutions, aqueous clay stabilizer solutions, aqueous chelating agent solutions, aqueous surfactant solutions and aqueous paraffin removal solutions. 21. The method of claim 8 wherein the treating fluid is an aqueous acid solution comprising one or more acids selected from the group consisting of hydrochloric acid, hydrofluoric acid, acetic acid, formic acid and other organic acids. 22. The method of claim 21 wherein the acid is a mixture of hydrochloric acid and hydrofluoric acid. 23. The method of claim 8 wherein the treating fluid is an aqueous scale inhibitor material solution comprising one or more scale inhibitor materials selected from the group consisting of tetrasodium ethylenediamine acetate, pentamethylene phosphonate, hexamethylenediamine phosphonate, polyacrylate and mixtures thereof. 24. The method of claim 23 wherein the scale inhibitor material comprises a mixture of tetrasodium ethylenediamine acetate and pentamethylene phosphonate. 25. The method of claim 8 wherein the treating fluid is an aqueous water blocking material solution comprising one or more water blocking materials selected from the group consisting of sodium silicate gels, organic polymers with metal cross-linkers and organic polymers with organic cross-linkers. 26. A method of uniformly introducing a treating fluid into a subterranean zone penetrated by a well bore comprising perforation tunnels formed therein comprising the steps of: (a) packing a self-degradable particulate diverting material in the perforation tunnels, the self-degradable particulate diverting material comprising a mixture of a degradable particulate and a hydrated organic or inorganic compound; (b) introducing a treating fluid into said subterranean zone by way of said perforation tunnels; (c) allowing the self-degradable particulate diverting material to divert the treating fluid into a particular region in the subterranean zone; (d) allowing the hydrated organic or inorganic solid compound to release water; and (e) allowing the degradable particulate in the self-degradable particulate diverting material to at least partially degrade in the water released by the hydrated organic or inorganic compound. 27. The method of claim 26 wherein the degradable particulate comprises a degradable polymer. 28. The method of claim 27 wherein the degradable polymer is selected from the group consisting of polysaccharides, chitins, chitosans, proteins, aliphatic polyesters, poly(lactides), poly(glycolides), poly(ε-carprolactones), poly(hydroxybutyrates), poly(anhydrides), aliphatic polycarbonates, poly(orthoesters), poly(amino acids), poly(ethylene oxides), polyphosphazenes, and mixtures thereof. 29. The method of claim 26 wherein the degradable particulate further comprises a plasticizer. 30. The method of claim 26 wherein the degradable particulate comprises poly(lactic acid). 31. The method of claim 26 wherein the degradable particulate comprises a stereoisomer of a poly(lactide). 32. The method of claim 26 wherein the degradable particulate comprises poly(phenyllactide). 33. The method of claim 26 wherein the hydrated organic or inorganic solid compound comprises hydrates of organic acids or organic acid salts. 34. The method of claim 33 wherein the hydrated organic or inorganic solid compound is selected from the group consisting of sodium acetate trihydrate, L-tartaric acid disodium salt dihydrate, sodium citrate dihydrate, sodium tetraborate decahydrate, sodium hydrogen phosphate heptahydrate, sodium phosphate dodecahydrate, amylose, starch-based hydrophilic polymers, and cellulose-based hydrophilic polymers. 35. The method of claim 26 wherein the organic or inorganic compound comprises sodium acetate trihydrate and the degradable particulate comprises poly(lactic acid). 36. The method of claim 26 wherein the degradable particulate comprises lactide units, the lactide units and the released water of the organic or inorganic compound being present in the mixture in equal molar amounts. 37. The method of claim 26 wherein the treating fluid introduced in accordance with step (b) is selected from the group consisting of oils, oil-water emulsions, oil based foams, water based foams, fresh water, salt water, formation water and various aqueous solutions. 38. The method of claim 37 wherein the treating fluid is an aqueous treating fluid solution selected from the group consisting of aqueous acid solutions, aqueous scale inhibitor material solutions, aqueous water blocking material solutions, aqueous clay stabilizer solutions, aqueous chelating agent solutions, aqueous surfactant solutions and aqueous paraffin removal solutions. 39. The method of claim 26 wherein the treating fluid is an aqueous acid solution comprising one or more acids selected from the group consisting of hydrochloric acid, hydrofluoric acid, acetic acid, formic acid and other organic acids. 40. The method of claim 39 wherein the acid is a mixture of hydrochloric acid and hydrofluoric acid. 41. The method of claim 26 wherein the treating fluid is an aqueous scale inhibitor material solution comprising one or more scale inhibitor materials selected from the group consisting of tetrasodium ethylenediamine acetate, pentamethylene phosphonate, hexamethylenediamine phosphonate, polyacrylate and mixtures thereof. 42. The method of claim 41 wherein the scale inhibitor material comprises a mixture of tetrasodium ethylenediamine acetate and pentamethylene phosphonate. 43. The method of claim 26 wherein the treating fluid is an aqueous water blocking material solution comprising one or more water blocking materials selected from the group consisting of sodium silicate gels, organic polymers with metal cross-linkers and organic polymers with organic cross-linkers. 44. An method of diverting a treating fluid in a subterranean zone penetrated by a well bore comprising the steps of: (a) placing a self-degradable particulate diverting material in the subterranean zone, the self-degradable particulate diverting material comprising a degradable particulate; (b) introducing a treating fluid into the subterranean zone; (c) allowing the self-degradable particulate diverting material to divert the treating fluid into a particular region in the subterranean zone; (d) introducing a source of releasable water into the subterranean zone; (e) allowing the source of releasable water to release water; and (f) allowing the degradable particulate to at least partially degrade in the presence of said released water in said subterranean zone. 45. The method of claim 44 wherein the source of releasable water is a hydrated organic or inorganic solid compound selected from the group consisting of sodium acetate trihydrate, L-tartaric acid disodium salt dihydrate, sodium citrate dihydrate, sodium tetraborate decahydrate, sodium hydrogen phosphate heptahydrate, sodium phosphate dodecahydrate, amylose, starch-based hydrophilic polymers, and cellulose-based hydrophilic polymers. 46. The method of claim 45 wherein the organic or inorganic compound is sodium acetate trihydrate. 47. The method of claim 42 wherein the degradable particulate comprises a degradable polymer. 48. The method of claim 47 wherein the degradable polymer is selected from the group consisting of polysaccharides, chitins, chitosans, proteins, aliphatic polyesters, poly(lactides), poly(glycolides), poly(ε-carprolactones), poly(hydroxybutyrates), poly(anhydrides), aliphatic polycarbonates, poly(orthoesters), poly(amino acids), poly(ethylene oxides), polyphosphazenes, and mixtures thereof. 49. The method of claim 44 wherein the degradable particulate further comprises a plasticizer. 50. The method of claim 44 wherein the degradable particulate comprises poly(lactic acid). 51. The method of claim 44 wherein the degradable particulate comprises a stereoisomer of a poly(lactide). 52. The method of claim 44 wherein the degradable particulate comprises poly(phenyllactide). 53. The method of claim 45 wherein the degradable particulate comprises lactide units, the lactide units and the released water of the organic or inorganic compound being present in said mixture in equal molar amounts. 54. The method of claim 44 wherein the treating fluid introduced in accordance with step (b) is selected from the group consisting of oils, oil-water emulsions, oil based foams, water based foams, fresh water, salt water, formation water and various aqueous solutions. 55. The method of claim 44 wherein the treating fluid is an aqueous treating fluid solution selected from the group consisting of aqueous acid solutions, aqueous scale inhibitor material solutions, aqueous water blocking material solutions, aqueous clay stabilizer solutions, aqueous chelating agent solutions, aqueous surfactant solutions and aqueous paraffin removal solutions. 56. The method of claim 44 wherein the treating fluid is an aqueous acid solution comprising one or more acids selected from the group consisting of hydrochloric acid, hydrofluoric acid, acetic acid, formic acid and other organic acids. 57. The method of claim 56 wherein the acid is a mixture of hydrochloric acid and hydrofluoric acid. 58. The method of claim 44 wherein the treating fluid is an aqueous scale inhibitor material solution comprising one or more scale inhibitor materials selected from the group consisting of tetrasodium ethylenediamine acetate, pentamethylene phosphonate, hexamethylenediamine phosphonate, polyacrylate and mixtures thereof. 59. The method of claim 58 wherein the scale inhibitor material comprises a mixture of tetrasodium ethylenediamine acetate and pentamethylene phosphonate. 60. The method of claim 44 wherein the treating fluid is an aqueous water blocking material solution comprising one or more water blocking materials selected from the group consisting of sodium silicate gels, organic polymers with metal cross-linkers and organic polymers with organic cross-linkers.
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