Abstract: Various embodiments disclosed relate to demulsifier compositions for treatment of subterranean formations or produced petroleum comprising an emulsion. In various embodiments, the present invention provides a method of treating a subterranean formation. The method includes placing in the subterranean formation a demulsifier composition. The demulsifier composition includes an alkanolamide surfactant that is a (C1-C50)hydrocarbyl amide having groups R1 and R2 substituted on the amide nitrogen, wherein R1 and R2 are each independently selected from the group consisting of —H, —(C1-C50)hydrocarbyl, and —(C1-C50)hydrocarbylene-OH, wherein at least one of R1 and R2 is —(C1-C50)hydrocarbylene-OH. The demulsifier composition includes an alkoxylated alcohol surfactant that is a (C1-C50)hydrocarbyl-OH having a —((C2-C3)alkylene-O)n—H group on the —OH group, wherein n is about 1 to about 100. The demulsifier composition also includes an amine-oxide surfactant.

Abstract: Various embodiments disclosed relate to surfactant compositions for treatment of subterranean formations and produced oil. In various embodiments, the present invention provides a method of treating a subterranean formation including placing in the subterranean formation a surfactant composition. The surfactant composition includes an alkanolamide surfactant and an alkoxylated alcohol surfactant. The surfactant composition also includes an ionic surfactant, a nonionic surfactant, or a combination thereof.

Abstract: Various embodiments relate to crosslinked polymer-coated proppant. In various embodiments, the present invention provides a method of treating a subterranean formation. The method can include placing in the subterranean formation a crosslinked composition that includes proppant particles including polymer coatings thereon. The crosslinked composition also includes inter-particle crosslinks between the polymer coatings of at least some of the proppant particles, the inter-particle crosslinks including a crosslinker.

Abstract: Methods of evaluating formation stabilization treatments for subterranean formations are provided. In some embodiments, the methods comprise: providing; adding a portion of test fluid to each of a first and second portion of a material from a subterranean formation and agitating to form a first mixture and a second mixture; measuring capillary suction time of the first mixture and turbidity of the second mixture; placing a sandpack comprising another portion of the formation material in a column; passing another portion of the test fluid through the sandpack to collect an effluent; measuring a differential pressure across the sandpack and a turbidity of the effluent; and selecting a formation stabilization treatment for the subterranean formation based at least in part on one or more of the capillary suction time of the first mixture, the turbidity of the second mixture, the differential pressure across the sandpack, and the turbidity of the effluent.

Abstract: Methods of evaluating and/or selecting formation stabilization treatments for subterranean formations are provided. In some embodiments, the methods comprise: subjecting a test formation sample to stress loads, wherein sample comprises: two wafers of a formation material from a subterranean formation, and a plurality of proppant particulates between and in contact with the two wafers; measuring a conductivity of a test fluid through the test formation sample, wherein an eluted test fluid is collected after passing through the test formation sample; determining one or more damage properties of the test formation sample using computed tomography images; determining one or more properties of the eluted test fluid; and selecting a formation stabilization treatment for the subterranean formation based at least in part on the conductivity of the test fluid through the test formation sample, the damage properties of the test formation sample, and/or the properties of the eluted test fluid.

Abstract: In a subterranean formation, complexation of metal ions can often be desirable in order to mitigate reactivity of the metal ions. However, many chelating agents used for this purpose are commercially manufactured in an alkali metal salt form that may not be entirely suitable for use downhole. The working pH range of some types of chelating agents may also be limiting. Accordingly, methods for treating a subterranean formation can comprise: providing an acidic treatment fluid comprising a sulfonated iminodiacetic acid; introducing the acidic treatment fluid into a subterranean formation; and at least partially dissolving an acid-reactive substance in the subterranean formation while complexing one or more metal ions with the sulfonated iminodiacetic acid.

Abstract: Methods including deactivation and activation of permeability modifiers for use in subterranean formation operations. A first treatment fluid may be introduced into a subterranean formation having a first treatment zone having a first aqueous permeability value, the first treatment fluid comprising a first aqueous base fluid and a deactivated permeability modifier. The deactivated permeability modifier may be adsorbed onto a surface of the first treatment zone. A second treatment may thereafter be introduced into the subterranean formation, the second treatment fluid comprising a second aqueous base fluid and a cyclodextrin compound. The second treatment fluid may contact the deactivated permeability modifier to activate the permeability modifier by complexing the deactivating surfactant with the cyclodextrin compound, thereby forming an activated permeability modifier adsorbed onto the surface of the first treatment zone and reducing the aqueous permeability of the first treatment zone.

Abstract: Systems and methods for modifying rheology of a cement slurry are described. Methods may include forming a cement slurry composition and placing the cement slurry composition in a subterranean formation. The cement slurry composition contains water, diutan, and a magnesium oxychloride-based Sorel cement and can have specified properties for a ratio of diutan to water, a thixotropic index value, and a yield point.

Abstract: The invention provides a process for making compounds according to Formula I: where R1, R1a, R2, R2a, R3 and R3a are defined as set forth in the specification. Formula I compounds are useful as chelants and stabilizers of cations in aqueous media and the invention therefore provides a method for using the compounds in the treatment of subterranean formations, such as in acidizing operations.

Abstract: Suppressing passage of an aqueous fluid in a subterranean formation in preference to passage of an oleaginous fluid can often be desirable. Methods for suppressing the passage of an aqueous fluid in a subterranean formation, particularly a carbonate formation, can comprise: providing a treatment fluid comprising a carrier fluid and a relative permeability modifier comprising a reaction product of 1) an acrylamide polymer, any copolymer thereof, any derivative thereof, any salt thereof, or any combination thereof, and 2) a plurality of amine-containing compounds or any salt thereof, each amine-containing compound containing a primary amine, a secondary amine, or any combination thereof, and the amine-containing compounds being randomly reacted with at least a portion of the amide groups of the acrylamide polymer; and introducing the treatment fluid into a subterranean formation.

Abstract: Compositions and methods for treating a water and hydrocarbon producing subterranean formation to reduce the water permeability of the formation without reducing the hydrocarbon permeability of the formation are provided. In one embodiment, the method includes providing a treatment fluid including a base fluid and a relative permeability modifier including a polymer of at least one hydrophilic monomer and at least one hydrophobically modified hydrophilic monomer, wherein the polymer includes a sulfonate moiety, and introducing the treatment fluid into at least a portion of a subterranean formation.

Abstract: Systems and methods for modifying rheology of a cement slurry are described. Systems and methods may include a composition including diutan and a Sorel cement.

Abstract: Compositions and methods for treating a water and hydrocarbon producing subterranean formation to reduce the water permeability of the formation without substantially reducing the hydrocarbon permeability of the formation are provided. In one embodiment, the method includes providing a treatment fluid including a base fluid and a relative permeability modifier including a polymer of at least one hydrophilic monomer and at least one hydrophobically modified hydrophilic monomer, wherein the polymer includes a sulfonate moiety, and introducing the treatment fluid into at least a portion of a subterranean formation.

Abstract: Suppressing passage of an aqueous fluid in a subterranean formation in preference to passage of an oleaginous fluid can often be desirable. Methods for suppressing the passage of an aqueous fluid in a subterranean formation, particularly a carbonate formation, can comprise: providing a treatment fluid comprising a carrier fluid and a relative permeability modifier comprising a reaction product of 1) an acrylamide polymer, any copolymer thereof, any derivative thereof, any salt thereof, or any combination thereof, and 2) a plurality of amine-containing compounds or any salt thereof, each amine-containing compound containing a primary amine, a secondary amine, or any combination thereof, and the amine-containing compounds being randomly reacted with at least a portion of the amide groups of the acrylamide polymer; and introducing the treatment fluid into a subterranean formation.

Abstract: The invention provides a process for making compounds according to Formula I: where R1, R1a, R2, R2a, R3 and R3a are defined as set forth in the specification. Formula I compounds are useful as chelants and stabilizers of cations in aqueous media and the invention therefore provides a method for using the compounds in the treatment of subterranean formations, such as in acidizing operations.