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US 2012/0067585 A1Published application
Treatment of subterranean formations
AssigneesWater Mark Technologies, Inc., Polymer Ventures, Inc.
InventorsChristopher B. Murphy, Jon O. Fabri, Phillip B. Reilly, JR.
Life of this patent
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Abstract
A method of preparing and using a subterranean formation stabilization agent. The stabilization agent includes a guanidyl copolymer and may be admixed with a fracturing fluid and optionally brine. The stabilization agent is effective in preventing and/or reducing, for example, clay swelling and fines migration from a subterranean formation contacted with the stabilization agent.
Claims43
A method of reducing clay swelling and/or fines migration in a subterranean formation comprising:
- contacting the subterranean formation with a stabilization agent that comprises a guanidyl copolymer.
A method of reducing clay swelling and/or fines migration in a subterranean formation during and/or after hydraulic fracturing of a well comprising:
- admixing a guanidyl copolymer and a fracturing fluid to form an admixture of the guanidyl copolymer and the fracturing fluid;
- and
- contacting the subterranean formation with the admixture of the guanidyl copolymer and fracturing fluid to form a stabilized subterranean formation.
A stabilization agent comprising:
- an admixture of a guanidyl copolymer and a water-soluble salt in a ratio of about 10:1 to about 1:10, grams guanidyl copolymer to grams water-soluble salt;
- wherein the guanidyl copolymer is the condensation product of a guanidyl reactant t selected from the group consisting of guanidine, guanidine salt, cyanamide, dicyanamide, biguanide, guanylurea, guanylthiourea, polycyclic guanidine, N-(4-aminobutyl)guanidine, 2-amino-5-guanidinopentanoic acid, imidodicarbonimidic diamide, (N-butylimidocarbonimidic diamide), (2-(methylguanidino) ethanoic acid), (2-[carbamimidoyl(methyl)amino]ethyl dihydrogen phosphate), cyanoguanidine, (2-guanidinoacetic acid), (3-(diaminomethylideneamino)propanoic acid), (N,N-dimethylimidodicarbonimidic diamide), (1-nitroguanidine), (4-amino-N-[amino(imino)methyl]benzenesulfonamide), (2-[10-(diaminomethylideneamino)decyl]guanidine dihydrochloride), melamine, alkyl guanidine, aryl guanidine, alkylaryl guanidine, alkyl biguanide, aryl biguanide, alkylaryl biguanide, and a mixture thereof and a carbonyl reactant;
- and a carbonyl reactant selected from the group consisting of an aldehyde, a ketone, a urea, an amide, and a mixture thereof;
- and
- wherein the water-soluble salt is selected from the group consisting of potassium chloride, magnesium chloride, calcium chloride, and a mixture thereof.
2 more elements
A method of restabilizing a well from which hydrocarbons have been extracted, comprising:
- contacting a hydraulically fractured subterranean formation from which hydrocarbons have been extracted with a stabilization agent to form a restabilized well;
- the stabilization agent comprising a guanidyl copolymer which is the condensation product of a guanidyl reactant t selected from the group consisting of guanidine, guanidine salt, cyanamide, dicyanamide, biguanide, guanylurea, guanylthiourea, polycyclic guanidine, N-(4-aminobutyl)guanidine, 2-amino-5-guanidinopentanoic acid, imidodicarbonimidic diamide, (N-butylimidocarbonimidic diamide), (2-(methylguanidino) ethanoic acid), (2-[carbamimidoyl(methyl)amino]ethyl dihydrogen phosphate), cyanoguanidine, (2-guanidinoacetic acid), (3-(diaminomethylideneamino)propanoic acid), (N,N-dimethylimidodicarbonimidic diamide), (1-nitroguanidine), (4-amino-N-[amino(imino)methyl]benzenesulfonamide), (2-[10-(diamino-methylideneamino)decyl]guanidine dihydrochloride), melamine, alkyl guanidine, aryl guanidine, alkylaryl guanidine, alkyl biguanide, aryl biguanide, alkylaryl biguanide, and a mixture thereof and a carbonyl reactant;
- and a carbonyl reactant selected from the group consisting of an aldehyde, a ketone, a urea, an amide, and a mixture thereof.
A method of extracting oil from an oil containing subterranean formation comprising:
- providing, through a first borehole, a pressurized floodwater that comprises about 50 ppm to about 5,000 ppm guanidyl copolymer;
- and
- recovering oil from the subterranean formation through a second borehole;
- wherein the guanidyl copolymer is the condensation product of a guanidyl reactant t selected from the group consisting of guanidine, guanidine salt, cyanamide, dicyanamide, biguanide, guanylurea, guanylthiourea, polycyclic guanidine, N-(4-aminobutyl)guanidine, 2-amino-5-guanidinopentanoic acid, imidodicarbonimidic diamide, (N-butylimidocarbonimidic diamide), (2-(methylguanidino) ethanoic acid), (2-[carbamimidoyl(methyl)amino]ethyl dihydrogen phosphate), cyanoguanidine, (2-guanidinoacetic acid), (3-(diaminomethylideneamino)propanoic acid), (N,N-dimethylimidodicarbonimidic diamide), (1-nitroguanidine), (4-amino-N-[amino(imino)methyl]benzenesulfonamide), (2-[10-(diaminomethylideneamino)decyl]guanidine dihydrochloride), melamine, alkyl guanidine, aryl guanidine, alkylaryl guanidine, alkyl biguanide, aryl biguanide, alkylaryl biguanide, and a mixture thereof and a carbonyl reactant;
- and a carbonyl reactant selected from the group consisting of an aldehyde, a ketone, a urea, an amide, and a mixture thereof.
2 more elements
A method comprising:
- flushing a bore hole during drilling with a drilling fluid that comprises a guanidyl copolymer;
- wherein the guanidyl copolymer is the condensation product of a guanidyl reactant t selected from the group consisting of guanidine, guanidine salt, cyanamide, dicyanamide, biguanide, guanylurea, guanylthiourea, polycyclic guanidine, N-(4-aminobutyl)guanidine, 2-amino-5-guanidinopentanoic acid, imidodicarbonimidic diamide, (N-butylimidocarbonimidic diamide), (2-(methylguanidino) ethanoic acid), (2-[carbamimidoyl(methyl)amino]ethyl dihydrogen phosphate), cyanoguanidine, (2-guanidinoacetic acid), (3-(diaminomethylideneamino)propanoic acid), (N,N-dimethylimidodicarbonimidic diamide), (1-nitroguanidine), (4-amino-N-[amino(imino)methyl]benzenesulfonamide), (2-[10-(diaminomethylideneamino)decyl]guanidine dihydrochloride), melamine, alkyl guanidine, aryl guanidine, alkylaryl guanidine, alkyl biguanide, aryl biguanide, alkylaryl biguanide, and a mixture thereof and a carbonyl reactant;
- and a carbonyl reactant selected from the group consisting of an aldehyde, a ketone, a urea, an amide, and a mixture thereof.
Dependencies are inferred from the claim text.