Method of fracturing subterranean formations utilizing emulsions comprising acrylamide copolymers
First Claim
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1. A method of treating a subterranean formation penetrated by a well bore comprising:
- (a) preparing a fracturing fluid containing a mixture resulting from;
(I) providing a water-in-oil emulsion composition comprising;
(i) 5% to 99% by weight of a water-in-oil emulsion comprising;
(1) 10% to 90% by weight of a hydrophobic oil phase;
(2) 0.5% to 10% by weight of a surfactant system; and
(3) 5% to 90% by weight of a polymer-containing aqueous phase comprising water and a polymer or copolymer containing repeat units from an acrylamide monomer, wherein the polymer or copolymer comprises from 2% by weight to 89.5% by weight of the water-in-oil emulsion;
(ii) 0.5% to 90% by weight of a carrier solvent; and
(iii) 0 to 90% by weight of a fluidizing agent;
and adding(iv) 0.1% to 10% by weight of one or more inorganic microparticles, where the total of all components is 100% by weight; and
(II) adding the water-in-oil emulsion composition to water; and
(b) contacting the subterranean formation with the fracturing fluid.
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Abstract
A method of treating a subterranean formation penetrated by a well bore including:
- (a) preparing a fracturing fluid containing a mixture resulting from:
- (I) providing a water-in-oil emulsion composition that includes:
- (i) 5% to 99% by weight of a water-in-oil emulsion polymer comprising a polymer or copolymer containing repeat units from an acrylamide monomer;
- (ii) 0.5% to 90% by weight of a carrier solvent; and
- (iii) 0 to 90% by weight of a fluidizing agent; and adding
- (iv) 0.1% to 10% by weight of one or more inorganic microparticles, where the total of all components is 100% by weight; and
- (II) adding the water-in-oil emulsion composition to water; and
- (I) providing a water-in-oil emulsion composition that includes:
- (b) contacting the subterranean formation with the fracturing fluid.
- (a) preparing a fracturing fluid containing a mixture resulting from:
96 Citations
25 Claims
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1. A method of treating a subterranean formation penetrated by a well bore comprising:
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(a) preparing a fracturing fluid containing a mixture resulting from; (I) providing a water-in-oil emulsion composition comprising; (i) 5% to 99% by weight of a water-in-oil emulsion comprising; (1) 10% to 90% by weight of a hydrophobic oil phase; (2) 0.5% to 10% by weight of a surfactant system; and (3) 5% to 90% by weight of a polymer-containing aqueous phase comprising water and a polymer or copolymer containing repeat units from an acrylamide monomer, wherein the polymer or copolymer comprises from 2% by weight to 89.5% by weight of the water-in-oil emulsion; (ii) 0.5% to 90% by weight of a carrier solvent; and (iii) 0 to 90% by weight of a fluidizing agent; and adding (iv) 0.1% to 10% by weight of one or more inorganic microparticles, where the total of all components is 100% by weight; and (II) adding the water-in-oil emulsion composition to water; and (b) contacting the subterranean formation with the fracturing fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of treating a subterranean formation penetrated by a well bore comprising:
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(a) preparing a fracturing fluid containing a mixture resulting from; (I) providing a water-in-oil emulsion composition comprising; (i) 5% to 99% by weight of a water-in-oil emulsion comprising a polymer or copolymer containing repeat units from an acrylamide monomer; (ii) 0.5% to 90% by weight of a carrier solvent; and (iii) 0 to 90% by weight of a fluidizing agent; and adding (iv) 0.1% to 10% by weight of one or more inorganic microparticles, where the total of all components is 100% by weight; and (II) adding the water-in-oil emulsion composition to water; and (b) contacting the subterranean formation with the fracturing fluid, wherein the fracturing fluid further comprises 0.01% to 0.3% by weight of a pH adjusting compound for elevating the pH of the treating fluid selected from the group consisting of sodium hydroxide, potassium hydroxide and lithium hydroxide.
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24. A method of treating a subterranean formation penetrated by a well bore comprising:
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(a) preparing a fracturing fluid containing a mixture resulting from; (I) providing a water-in-oil emulsion composition comprising; (i) 5% to 99% by weight of a water-in-oil emulsion comprising a polymer or copolymer containing repeat units from an acrylamide monomer; (ii) 0.5% to 90% by weight of a carrier solvent; and (iii) 0 to 90% by weight of a fluidizing agent; and adding (iv) 0.1% to 10% by weight of one or more inorganic microparticles, where the total of all components is 100% by weight; and (II) adding the water-in-oil emulsion composition to water; and (b) contacting the subterranean formation with the fracturing fluid, wherein the fracturing fluid further comprises from 0.01% to 0.3% by weight of a pH adjusting compound selected from the group consisting of sodium hydroxide, potassium hydroxide, lithium hydroxide, ammonia, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium diacetate, potassium diacetate, sodium phosphate, potassium phosphate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, and mixtures thereof.
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25. A method of treating a subterranean formation penetrated by a well bore comprising:
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(a) preparing a fracturing fluid containing a mixture resulting from; (I) providing a water-in-oil emulsion composition comprising; (i) 5% to 99% by weight of a water-in-oil emulsion comprising a polymer or copolymer containing repeat units from an acrylamide monomer; (ii) 0.5% to 90% by weight of a carrier solvent; and (iii) 0 to 90% by weight of a fluidizing agent; and adding (iv) 0.1% to 10% by weight of one or more inorganic microparticles, where the total of all components is 100% by weight; and (II) adding the water-in-oil emulsion composition to water; and (b) contacting the subterranean formation with the fracturing fluid, wherein the fracturing fluid further comprises from 0.1% to 10% by weight of a clay stabilizer selected from the group consisting of potassium chloride, sodium chloride, ammonium chloride, tetramethyl ammonium chloride and temporary clay stabilizers.
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Specification