# US 8,739,877 B2 · Treatment fluids for wetting control of multiple rock types and associated methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,877 B2 - Document ID: US8739877B2 - Status: Granted - Kind: B2 - Application number: 12/688,610 - Filed: 2010-01-15 - Published: 2011-07-21 - Granted: 2014-06-03 - Earliest claimed: 2010-01-15 - Assignees: Halliburton Energy Services, Inc. - Applicants: Ian D. Robb; Richard D. Rickman; Jason E. Bryant - Inventors: Ian D. Robb; Richard D. Rickman; Jason E. Bryant - Web page: https://patentgrep.com/patent/US8739877B2 ## CPC - C09K 8/524: organic depositions, e.g. paraffins or asphaltenes - C09K 8/035: Organic additives - C09K 8/602: {containing surfactants} - C09K 8/685: {containing cross-linking agents} - C09K 8/74: combined with additives added for specific purposes - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract Methods for oil and/or gas production may employ mixed surfactants to treat a subterranean formation. The methods can comprise: providing a treatment fluid comprising: an aqueous base fluid, a first surfactant having a charge, a second surfactant having an opposite charge, and a compatibilizer; and introducing the treatment fluid into at least a portion of the subterranean formation. ## Claims ### Claim 1 A method comprising: providing a treatment fluid consisting essentially of: 1) an aqueous base fluid, a first surfactant having a charge, a second surfactant having an opposite charge, and a compatibilizer, or 2) an aqueous base fluid, a first surfactant having a charge, a second surfactant having an opposite charge, a compatibilizer, and an additive selected from the group consisting of a corrosion inhibitor, a particulate, an acid, a breaker, a scale inhibitor, a clay stabilizer, and any combination thereof; and wherein the compatibilizer comprises a nonionic surfactant or an amphoteric surfactant and wherein the compatibilizer prevents precipitation from the interaction of the first surfactant having a charge with the second surfactant having an opposite charge; introducing the treatment fluid into at least a portion of a subterranean formation. ### Claim 2 (depends on 1) The method of claim 1 wherein the aqueous base fluid comprises a fluid selected from the group consisting of fresh water, salt water, brine, seawater, and any combination thereof. ### Claim 3 (depends on 1) The method of claim 1 wherein the first surfactant or the second surfactant is selected from the group consisting of an alkyl quaternaryammonium compound, an alkyl trialkylammonium bromide, a dialkyldiethylammonium chloride, an alkyl imidazoline, a polyethoxylated alkylammonium chloride, an alkyldimethylbenzylammonium chloride, an alkylpyridinium chloride, an alkyl diammonium pentamethyl chloride, and any combination thereof. ### Claim 4 (depends on 3) The method of claim 3 wherein the first surfactant or the second surfactant is selected from the group consisting of an alkyl sulfate, an alkyl sulfonate, an alkyl aryl sulfonate, an alkyl aryl sulfate, an olefin sulfonate, a fatty acid salt, a fatty acid ester sulfonate, an alkyl ether sulfate, an alkyl ether phosphate, an alkyl phosphate ester, an alkylalcohol ethoxylate phosphate ester, an alkyl phenol ethoxylate phosphate, a phenol ethoxylate phosphate, an alkyl ether carboxylate dialkyl sulfosuccinate, a perfluoroalkanoic acid, a sodium alkyl sarcosinate, and any combination thereof. ### Claim 5 (depends on 1) The method of claim 1 wherein the treatment fluid comprises the first and second surfactants in an amount of about 0.01% to about 3% by volume of the treatment fluid. ### Claim 6 (depends on 1) The method of claim 1 wherein the treatment fluid comprises the compatibilizer in an amount of about 0.01% to about 3% by volume of the treatment fluid. ### Claim 7 (depends on 1) The method of claim 1 wherein the compatibilizer is selected from the group consisting of an alkyl ethoxylate, an alkyl polyglucoside, a polyamine-ethoxylated diamine, an alkylpropoxylated amine, a fatty alcohol, an alkylamide monoethanolamine, an alkylamide diethanolamine, an alkyldialkylamine oxide, an alkylamide, an ethoxylated amide alkoxylated alkyl phenol, an alkoxylated alcohol, a polyol, a polyol ester, an alkyliminodipropionate disodium, an alkylamphodiacetate disodium, an alkylampho hydroxypropyl sulfonate sodium, an alkylamidopropylhydroxysultaine, a lecithin, and any combination thereof. ### Claim 8 (depends on 1) The method of claim 1 wherein the treatment fluid is used as part of an oilfield operation selected from the group consisting of a drill-in operation, a fracturing operation, a well bore cleanup operation, a viscous sweep, a fines control operation, a gravel packing operation, a frac pack operation, an acidizing operation, a stimulation operation, and any combination thereof. ### Claim 9 (depends on 1) The method of claim 1 wherein the subterranean formation comprises a first rock having an affinity for the first surfactant and a second rock having an affinity for the second surfactant. ### Claim 10 A method comprising: providing a fracturing fluid comprising: an aqueous base fluid, proppant particulates, a first surfactant having a charge, a second surfactant having an opposite charge, and a compatibilizer, wherein the compatibilizer comprises a nonionic surfactant or an amphoteric surfactant and wherein the compatibilizer prevents precipitation from the interaction of the first surfactant having a charge with the second surfactant having an opposite charge; and introducing the fracturing fluid into at least a portion of a subterranean formation at a rate and pressure sufficient to create or enhance at least one or more fractures in the subterranean formation. ### Claim 11 (depends on 10) The method of claim 10 wherein the aqueous base fluid comprises a fluid selected from the group consisting of fresh water, salt water, brine, seawater, and any combination thereof. ### Claim 12 (depends on 10) The method of claim 10 wherein the first surfactant or the second surfactant is selected from the group consisting of an alkyl quaternaryammonium compound, an alkyl trialkylammonium bromide, a dialkyldiethylammonium chloride, an alkyl imidazoline, a polyethoxylated alkylammonium chloride, an alkyldimethylbenzylammonium chloride, an alkylpyridinium chloride, an alkyl diammonium pentamethyl chloride, and any combination thereof. ### Claim 13 (depends on 12) The method of claim 12 wherein the first surfactant or the second surfactant is selected from the group consisting of an alkyl sulfate, an alkyl sulfonate, an alkyl aryl sulfonate, an alkyl aryl sulfate, an olefin sulfonate, a fatty acid salt, a fatty acid ester sulfonate, an alkyl ether sulfate, an alkyl ether phosphate, an alkyl phosphate ester, an alkylalcohol ethoxylate phosphate ester, an alkyl phenol ethoxylate phosphate, a phenol ethoxylate phosphate, an alkyl ether carboxylate dialkyl sulfosuccinate, a perfluoroalkanoic acid, a sodium alkyl sarcosinate, and any combination thereof. ### Claim 14 (depends on 10) The method of claim 10 wherein the treatment fluid comprises the first and second surfactants in an amount of about 0.03% to about 10% by weight of the treatment fluid. ### Claim 15 (depends on 10) The method of claim 10 wherein the treatment fluid comprises the compatibilizer in an amount of about 0.01% to about 3% by volume of the treatment fluid. ### Claim 16 (depends on 10) The method of claim 10 wherein the compatibilizer is selected from the group consisting of an alkyl ethoxylate, alkyl polyglucoside, a polyamine-ethoxylated diamine, an alkylpropoxylated amine, a fatty alcohol, an alkylamide monoethanolamine, an alkylamide diethanolamine, an alkyldialkylamine oxide, an alkylamide, an ethoxylated amide alkoxylated alkyl phenol, an alkoxylated alcohol, a polyol, a polyol ester, an alkyliminodipropionate disodium, an alkylamphodiacetate disodium, an alkylampho hydroxypropyl sulfonate sodium, an alkylamidopropylhydroxysultaine, a lecithin, and any combination thereof. ### Claim 17 A method comprising: providing a fracturing fluid comprising: an aqueous base fluid, a first surfactant having a charge, a second surfactant having an opposite charge, and a compatibilizer, wherein the compatibilizer comprises a nonionic surfactant or an amphoteric surfactant and wherein the compatibilizer prevents precipitation from the interaction of the first surfactant having a charge with the second surfactant having an opposite charge; and introducing the fracturing fluid into at least a portion of a subterranean zone comprising a first rock having an affinity for the first surfactant and a second rock having an affinity for the second surfactant, the first rock comprising a siliceous mineral and the second rock comprising a carbonate mineral.