US 8,940,667 B2Granted

Fluid treatment systems, compositions and methods for metal ion stabilization in aqueous solutions and/or enhanced fluid performance

AssigneesKroff Chemical Company, Nabors Completion & Production Services Co.

InventorsPaul Rey, Susan Rey, Michael John Seyman, Matthew E. Blauch

Life of this patent

Estimating the term…

Loading patent…

Abstract

Fluid treatment systems and compositions are provided including (a) at least one material including (1) at least one carboxylic acid functional group and (2) at least one sulfur-containing group selected from the group consisting of sulfonyl functional groups, sulfonate functional groups and mixtures thereof; (b) at least one friction reducing agent selected from the group consisting of guar gums, polyacrylamides, hydratable cellulosic materials, viscoelastic surfactants, and mixtures thereof; and (c) at least one scale control agent. The fluid treatment systems and compositions can be used to treat aqueous systems, for example as fracturing fluids for treating aqueous compositions found in subterranean formations. Methods for inhibiting formation and/or precipitation of metal oxides in an aqueous composition using the fluid treatment systems or compositions also are provided.

Claims54

Dependent claims

A fracturing fluid treatment system comprising:

(a) at least one material comprising (1) at least one carboxylic acid functional group and (2) at least one sulfur-containing group selected from the group consisting of sulfonyl functional groups, sulfonate functional groups, and mixtures thereof, wherein the material (a) has a weight average molecular weight ranging from about 500 to about 30,000 grams per mole;
(b) at least one friction reducing agent comprising:
(i) about 5% to about 99% by weight of a water-in-oil emulsion polymer comprising a polyacrylamide comprising one or more repeat units according to Formula I:
wherein each occurrence of R1 is independently selected from H, methyl and ethyl;
n is an integer from 10 to 10,000,000;
Z is selected from —O— and —NR2—;
and each occurrence of R2 is independently selected from the group consisting of H, C1-C22 linear, branched or cyclic alkyl, aryl, alkaryl, aralkyl or alkenyl group, —R3—NR22, —R3—N+R23X, and —R3—SO3Y, wherein R2 is as previously defined;
R3 is a divalent linking group selected from the group consisting of C1-C22 linear, branched or cyclic alkylene, arylene, alkarylene, aralkylene or alkenylene, poly(ethyleneoxide) and poly(propyleneoxide);
Y is H or an alkali metal ion;
and X is a halide or methylsulfate, wherein the polyacrylamide has a molecular weight of 1,000,000 to 50,000,000 grams per mole;
(ii) about 0.1% to about 10% by weight of one or more inorganic microparticles;
(iii) about 0.5% to about 90% by weight of a carrier solvent;
and
(iv) 0 to about 90% by weight of a fluidizing agent;
and
(c) at least one scale control agent, wherein the scale control agent comprises at least one water-soluble polycarboxylate comprising a polymer derived from at least one carboxylic acid functional, ethylenically unsaturated material selected from the group consisting of acrylic acid, methacrylic acid, vinyl acetic acid, allyl acetic acid, fumaric acid, phosphinocarboxylic acid, maleic acid or anhydride, itaconic acid, α-halo acrylic acid, β-carboxyethyl acrylic acid and mixtures thereof.

13 more elements

A fracturing composition comprising:

(a) at least one material comprising (1) at least one carboxylic acid functional group and (2) at least one sulfur-containing group selected from the group consisting of sulfonyl functional groups, sulfonate functional groups, and mixtures thereof, wherein the material (a) has a weight average molecular weight ranging from about 500 to about 30,000 grams per mole;
(b) at least one friction reducing agent comprising:
(i) about 5% to about 99% by weight of a water-in-oil emulsion polymer comprising a polyacrylamide comprising one or more repeat units according to Formula I:
wherein each occurrence of R1 is independently selected from H, methyl and ethyl;
n is an integer from 10 to 10,000,000;
Z is selected from —O— and —NR2—;
and each occurrence of R2 is independently selected from the group consisting of H, C1-C22 linear, branched or cyclic alkyl, aryl, alkaryl, aralkyl or alkenyl group, —R3—NR22, —R3—N+R23X, and —R3—SO3Y, wherein R2 is as previously defined;
R3 is a divalent linking group selected from the group consisting of C1-C22 linear, branched or cyclic alkylene, arylene, alkarylene, aralkylene or alkenylene, poly(ethyleneoxide) and poly(propyleneoxide);
Y is H or an alkali metal ion;
and X is a halide or methylsulfate, wherein the polyacrylamide has a molecular weight of 1,000,000 to 50,000,000 grams per mole;
(ii) about 0.1% to about 10% by weight of one or more inorganic microparticles;
(iii) about 0.5% to about 90% by weight of a carrier solvent;
and
(iv) 0 to about 90% by weight of a fluidizing agent;
and
(c) at least one scale control agent, wherein the scale control agent comprises at least one water-soluble polycarboxylate comprising a polymer derived from at least one carboxylic acid functional, ethylenically unsaturated material selected from the group consisting of acrylic acid, methacrylic acid, vinyl acetic acid, allyl acetic acid, fumaric acid, phosphinocarboxylic acid, maleic acid or anhydride, itaconic acid, α-halo acrylic acid, β-carboxyethyl acrylic acid and mixtures thereof.

13 more elements

A method of inhibiting formation of metal oxides in an aqueous composition comprising at least 20 milligrams of metal ions per liter of aqueous composition, comprising:

mixing an aqueous composition comprising metal ions with a fracturing fluid treatment system comprising:
(a) at least one material comprising (1) at least one carboxylic acid functional group and (2) at least one sulfur-containing group selected from the group consisting of sulfonyl functional groups, sulfonate functional groups and mixtures thereof, wherein the material (a) has a weight average molecular weight ranging from about 500 to about 30,000 grams per mole;
(b) at least one friction reducing agent comprising:
(i) about 5% to about 99% by weight of a water-in-oil emulsion polymer comprising a polyacrylamide comprising one or more repeat units according to Formula I:
wherein each occurrence of R1 is independently selected from H, methyl and ethyl;
n is an integer from 10 to 10,000,000;
Z is selected from —O— and —NR2—;
and each occurrence of R2 is independently selected from the group consisting of H, C1-C22 linear, branched or cyclic alkyl, aryl, alkaryl, aralkyl or alkenyl group, —R3—NR22, —R3—N+R23X, and —R3—SO3Y, wherein R2 is as previously defined;
R3 is a divalent linking group selected from the group consisting of C1-C22 linear, branched or cyclic alkylene, arylene, alkarylene, aralkylene or alkenylene, poly(ethyleneoxide) and poly(propyleneoxide);
Y is H or an alkali metal ion;
and X is a halide or methylsulfate, wherein the polyacrylamide has a molecular weight of 1,000,000 to 50,000,000 grams per mole;
(ii) about 0.1% to about 10% by weight of one or more inorganic microparticles;
(iii) about 0.5% to about 90% by weight of a carrier solvent;
and
(iv) 0 to about 90% by weight of a fluidizing agent;
and
(c) at least one scale control agent, wherein the scale control agent comprises at least one water-soluble polycarboxylate comprising a polymer derived from at least one carboxylic acid functional, ethylenically unsaturated material selected from the group consisting of acrylic acid, methacrylic acid, vinyl acetic acid, allyl acetic acid, fumaric acid, phosphinocarboxylic acid, maleic acid or anhydride, itaconic acid, α-halo acrylic acid, β-carboxyethyl acrylic acid and mixtures thereof.

14 more elements

A method of inhibiting precipitation of metal oxides in an aqueous composition comprising at least 20 milligrams of metal ions per liter of aqueous composition, comprising:

mixing an aqueous composition comprising metal ions with a fracturing fluid treatment system comprising:
(a) at least one material comprising (1) at least one carboxylic acid functional group and (2) at least one sulfur-containing group selected from the group consisting of sulfonyl functional groups, sulfonate functional groups and mixtures thereof, wherein the material (a) has a weight average molecular weight ranging from about 500 to about 30,000 grams per mole;
(b) at least one friction reducing agent comprising:
(i) about 5% to about 99% by weight of a water-in-oil emulsion polymer comprising a polyacrylamide comprising one or more repeat units according to Formula I:
wherein each occurrence of R1 is independently selected from H, methyl and ethyl;
n is an integer from 10 to 10,000,000;
Z is selected from —O— and —NR2—;
and each occurrence of R2 is independently selected from the group consisting of H, C1-C22 linear, branched or cyclic alkyl, aryl, alkaryl, aralkyl or alkenyl group, —R3—NR22, —R3—N+R23X, and —R3—SO3Y, wherein R2 is as previously defined;
R3 is a divalent linking group selected from the group consisting of C1-C22 linear, branched or cyclic alkylene, arylene, alkarylene, aralkylene or alkenylene, poly(ethyleneoxide) and poly(propyleneoxide);
Y is H or an alkali metal ion;
and X is a halide or methylsulfate, wherein the polyacrylamide has a molecular weight of 1,000,000 to 50,000,000 grams per mole;
(ii) about 0.1% to about 10% by weight of one or more inorganic microparticles;
(iii) about 0.5% to about 90% by weight of a carrier solvent;
and
(iv) 0 to about 90% by weight of a fluidizing agent;
and
(c) at least one scale control agent, wherein the scale control agent comprises at least one water-soluble polycarboxylate comprising a polymer derived from at least one carboxylic acid functional, ethylenically unsaturated material selected from the group consisting of acrylic acid, methacrylic acid, vinyl acetic acid, allyl acetic acid, fumaric acid, phosphinocarboxylic acid, maleic acid or anhydride, itaconic acid, α-halo acrylic acid, β-carboxyethyl acrylic acid and mixtures thereof.

14 more elements

A method of improving friction reduction of a friction reducing agent in a hydraulic fracturing fluid comprising at least about 10 ppm ferrous iron, comprising:

mixing an aqueous composition comprising at least about 10 ppm ferrous iron with a fracturing fluid treatment system comprising:
(a) at least one material comprising (1) at least one carboxylic acid functional group and (2) at least one sulfur-containing group selected from the group consisting of sulfonyl functional groups, sulfonate functional groups and mixtures thereof, wherein the material (a) has a weight average molecular weight ranging from about 500 to about 30,000 grams per mole;
(b) at least one friction reducing agent comprising:
about 5% to about 99% by weight of a water-in-oil emulsion polymer comprising a polyacrylamide comprising one or more repeat units according to Formula I:
wherein each occurrence of R1 is independently selected from H, methyl and ethyl;
n is an integer from 10 to 10,000,000;
Z is selected from —O— and —NR2—;
and each occurrence of R2 is independently selected from the group consisting of H, C1-C22 linear, branched or cyclic alkyl, aryl, alkaryl, aralkyl or alkenyl group, —R3—NR22, —R3—N+R23X, and —R3—SO3Y, wherein R2 is as previously defined;
R3 is a divalent linking group selected from the group consisting of C1-C22 linear, branched or cyclic alkylene, arylene, alkarylene, aralkylene or alkenylene, poly(ethyleneoxide) and poly(propyleneoxide);
Y is H or an alkali metal ion;
and X is a halide or methylsulfate, wherein the polyacrylamide has a molecular weight of 1,000,000 to 50,000,000 grams per mole;
(ii) about 0.1% to about 10% by weight of one or more inorganic microparticles;
(iii) about 0.5% to about 90% by weight of a carrier solvent;
and
(iv) 0 to about 90% by weight of a fluidizing agent;
and
(c) at least one scale control agent, wherein the scale control agent comprises at least one water-soluble polycarboxylate comprising a polymer derived from at least one carboxylic acid functional, ethylenically unsaturated material selected from the group consisting of acrylic acid, methacrylic acid, vinyl acetic acid, allyl acetic acid, fumaric acid, phosphinocarboxylic acid, maleic acid or anhydride, itaconic acid, α-halo acrylic acid, β-carboxyethyl acrylic acid and mixtures thereof.

14 more elements

A method of improving friction reduction of a friction reducing agent in a hydraulic fracturing fluid comprising at least about 10 ppm ferrous iron, comprising:

mixing an aqueous composition comprising at least about 10 ppm ferrous iron with a fracturing fluid treatment system consisting of:
(a) a reaction product (a) prepared from reactants consisting of 20 to 80 wt % acrylic acid and 10 to 60 wt % 2-acrylamido-2-methylpropyl sulfonic acid, the reaction product (a) having a weight average molecular weight ranging from about 500 to about 30,000 grams per mole;
and
(b) at least one friction reducing agent comprising:
(i) about 5% to about 99% by weight of a water-in-oil emulsion polymer comprising a polyacrylamide comprising one or more repeat units according to Formula I:
wherein each occurrence of R1 is independently selected from H, methyl and ethyl;
n is an integer from 10 to 10,000,000;
Z is selected from —O— and —NR2—;
and each occurrence of R2 is independently selected from the group consisting of H, C1-C22 linear, branched or cyclic alkyl, aryl, alkaryl, aralkyl or alkenyl group, R3—NR22, —R3—N+R23X, and —R3—SO3Y, wherein R2 is as previously defined;
R3 is a divalent linking group selected from the group consisting of C1-C22 linear, branched or cyclic alkylene, arylene, alkarylene, aralkylene or alkenylene, poly(ethyleneoxide) and poly(propyleneoxide);
Y is H or an alkali metal ion;
and X is a halide or methylsulfate, wherein the polyacrylamide has a molecular weight of 1,000,000 to 50,000,000 grams per mole;
(ii) about 0.1% to about 10% by weight of one or more inorganic microparticles;
(iii) about 0.5% to about 90% by weight of a carrier solvent;
and
(iv) 0 to about 90% by weight of a fluidizing agent;
and
(c) at least one scale control agent, wherein the scale control agent consisting of 2-phosphono-1,2,4-tricarboxybutane, polyacrylic acid and a reaction product prepared from acrylic acid and 2-acrylamido-2-methylpropyl sulfonic acid.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/794,495Filed 4 Jun 2010 · us provisional application
Priority: 5 Jun 2009
Published: US 2010/0311618 A19 Dec 2010
Granted: 27 Jan 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

C09K 8/68
Compositions based on water or polar solvents: containing organic compounds
C09K 8/74
Eroding chemicals, e.g. acids: combined with additives added for specific purposes
C09K 8/88
Containing organic compounds: macromolecular compounds
C09K 8/90
Macromolecular compounds: of natural origin, e.g. polysaccharides, cellulose