Abstract: The present disclosure provides methods and compositions for controlling asphaltenes in a subterranean formation. The compositions may include a halloysite nanotube. The nanotube has a lumen and a polymer, along with a charged surfactant, may be disposed in the lumen. A wax may be disposed on the nanotube. The wax may be disposed at either or both ends of the nanotube, thereby temporarily preventing the polymer and charged surfactant from leaving the lumen.

Abstract: Disclosed herein are compositions and methods for increasing recovery, or flowback, of hydrocarbon compounds from hydrocarbon-containing subterranean fractured rock formations (tight shale reservoirs). The flowback compositions include an anionic dimer surfactant, an anionic monomer surfactant, and a demulsifier. The flowback compositions convert oil-wet rocks to water-wet, yet exhibit a low tendency of composition components to sorb to the rock. The flowback compositions do not cause formation of emulsions with hydrocarbon compounds within the subterranean fractured rock formations. The flowback composition are useful for increasing the yield of hydrocarbons recovered from tight shale reservoirs.

Abstract: Provided herein are injection molded perfusion-enabled bioreactors and systems including said bioreactors. The bioreactor can include a lid, a frame comprising an an-ay of sample wells, a membrane adhered to a bottom of the frame beneath the array of sample wells, and a skirt adhered to a bottom of the frame, such that the membrane is located between the frame and the skirt. The skirt can include a plurality of channels corresponding to the sample wells.

Abstract: A switch-mode active electromagnetic interference (EMI) cancellation circuit comprising a set of low-voltage switching elements and a low-voltage inductor or capacitor located at an input to, or at an output from, a set of high-voltage switching elements employed for the power conversion, wherein a controller is operatively coupled to the second set of switching elements to control switching operations of the second set of switching elements at to apply an opposing matching alternating voltage or current into the inductor or capacitor to cancel that high-frequency ripples flowing through the inductor or capacitor generated from the switching of the set of switching elements of the power converter.

Abstract: Disclosed are surface-modified nanoparticles and surfactants used in compositions and methods for enhancing hydro-carbon recovery from subterranean formations.

Abstract: The present disclosure provides methods and compositions for controlling asphaltenes in a subterranean formation. The compositions may include silica, a polymer, and optionally a charged surfactant. The compositions may also include a solvent or other additives. The methods may include injecting the compositions into subterranean formations and inhibiting asphaltene precipitation.

Abstract: Compositions and methods for increasing recovery, or flowback, of hydrocarbon compounds from hydrocarbon-containing subterranean oil formations. Concentrates include a sulfonated and/or a sulfated surfactant, an alkoxylated alcohol surfactant, a coupling agent, a hydrotrope, an additional surfactant, and water. Injectate compositions for oil recovery include the concentrate and a water source such as a produced water and/or seawater. Inclusion of particular hydrotropes such as sodium xylene sulfonate and/or potassium toluene phosphate in the compositions provides higher yields of hydrocarbons recovered. Larger amounts of hydrotrope result in an increase in injectate interfacial tension, but also result, as judged by decreased turbidity, in improved compatibility of the surfactant system in injectates made with water sources comprising salts.

Abstract: Methods for removing biofilm or preventing biofilm formation from surfaces are provided, the methods comprising applying compositions to the surface to remove the biofilm or inhibit its formation, the compositions comprising polymers derived from alkyl polyglucosides functionalized with cationic side chains.

Abstract: Surfactants are imbibed into Halloysite nanotubes (HNT) and the imbibed nanotubes are coated with wax on the nanotube outer surface. The wax layer prevents the surfactant from being disgorged from the HNT lumen until a triggering condition exists. Triggering conditions include contact with oil, which dissolves the wax; or exposure to temperatures above a melt transition of the wax, which causes the wax to melt. Upon exposure to a triggering condition, at least some of the imbibed surfactants are disgorged from the HNT and into the surrounding environment. The disgorged surfactants provide a conventional effect of reducing interfacial tension and changing reservoir rock wettability to enhance oil recovery. A range of surfactants and waxes are usefully employed in the compositions and methods described herein.

Abstract: Disclosed herein are compositions and methods for increasing recovery, or flowback, of hydrocarbon compounds from hydrocarbon-containing subterranean fractured rock formations (tight shale reservoirs). The flowback compositions include an anionic dimer surfactant, an anionic monomer surfactant, and a demulsifier. The flowback compositions convert oil-wet rocks to water-wet, yet exhibit a low tendency of composition components to sorb to the rock. The flowback compositions do not cause formation of emulsions with hydrocarbon compounds within the subterranean fractured rock formations. The flowback composition are useful for increasing the yield of hydrocarbons recovered from tight shale reservoirs.

Abstract: Ether amine additives are used in oil recovery such as steam-assisted gravity drainage and cyclic steam stimulation, as well as surface mining of bitumen. Methods of oil recovery using the ether amine additives are described. The ether amine additives are injected with steam into a subterranean oil reservoir such as oil tar sands to improve recovery of oils such as bitumen and/or heavy oil, or used to wash surface-mined rock to assist in oil extraction therefrom. The ether amine additives may be added to steam in steam-assisted oil recovery methods such as cyclic steam stimulation and steam-assisted gravity drainage. Condensates of the additives in steam exhibit very low advancing and receding contact angles and low interfacial tensions at low concentrations of the additives.

Abstract: Disclosed herein are compositions and methods for increasing recovery, or flowback, of hydrocarbon compounds from hydrocarbon-containing subterranean fractured rock formations (tight shale reservoirs). The flowback compositions include an anionic dimer surfactant, an anionic monomer surfactant, and a demulsifier. The flowback compositions convert oil-wet rocks to water-wet, yet exhibit a low tendency of composition components to sorb to the rock. The flowback compositions do not cause formation of emulsions with hydrocarbon compounds within the subterranean fractured rock formations. The flowback composition are useful for increasing the yield of hydrocarbons recovered from tight shale reservoirs.

Abstract: Surfactants are imbibed into Halloysite nanotubes (HNT) and the imbibed nanotubes are coated with wax on the nanotube outer surface. The wax layer prevents the surfactant from being disgorged from the HNT lumen until a triggering condition exists. Triggering conditions include contact with oil, which dissolves the wax; or exposure to temperatures above a melt transition of the wax, which causes the wax to melt. Upon exposure to a triggering condition, at least some of the imbibed surfactants are disgorged from the HNT and into the surrounding environment. The disgorged surfactants provide a conventional effect of reducing interfacial tension and changing reservoir rock wettability to enhance oil recovery. A range of surfactants and waxes are usefully employed in the compositions and methods described herein.

Abstract: Disclosed herein are compositions and methods for increasing recovery of hydrocarbon compounds from hydrocarbon-containing subterranean fractured rock formations. Novel emulsions and fracturing fluids are provided. The fracturing fluids convert oil-wet rocks to water-wet, yet exhibit a low tendency of composition components to sorb to the rock. The fracturing fluids do not cause formation of emulsions with hydrocarbon compounds within the subterranean fractured rock formations.

Abstract: Provided herein are compositions useful as ink or coatings which contain novel dispersants that are capable of dispersing pigments which are traditionally difficult to disperse while maintaining acceptable levels of viscosity. Use of dispersants as taught herein enables the preparation of a wide variety of inks and coatings having high pigment loading and existing within a conventionally-useful viscosity range.

Abstract: Compositions and methods for increasing recovery, or flowback, of hydrocarbon compounds from hydrocarbon-containing subterranean reservoirs. The compositions include a dialkyl dimethyl ammonium surfactant, an amphoteric surfactant, and a solvent. The concentrated compositions are storage stable and easily diluted with a water source such as produced water to form injectates suitable for injecting into one or more hydrocarbon-bearing subterranean reservoirs. The injectates convert oil-wet rocks to water-wet but do not cause formation of emulsions with hydrocarbon compounds within the subterranean environment. Injection of the injectates into a reservoir results in an increase in the yield of hydrocarbons recovered, in particular from low permeability, low porosity reservoirs such as those formed by or encountered in hydraulic fracturing and/or in certain geographic locations.

Abstract: Disclosed herein are ether amine additives for use in oil recovery such as steam-assisted gravity drainage and cyclic steam stimulation, as well as surface mining of bitumen. Methods of oil recovery using the ether amine additives are described. The ether amine additives are injected with steam into a subterranean oil reservoir such as oil tar sands to improve recovery of oils such as bitumen and/or heavy oil, or used to wash surface-mined rock to assist in oil extraction therefrom. The ether amine additives may be added to steam in steam-assisted oil recovery methods such as cyclic steam stimulation and steam-assisted gravity drainage. Condensates of the additives in steam exhibit very low advancing and receding contact angles and low interfacial tensions at low concentrations of the additives.

Abstract: The present invention generally relates to methods for enhancing production and transportation of heavy and extra-heavy crude oil and for reducing the growth of asphaltene flocculants or hindering their formation, the methods comprising contacting an oil-soluble composition that comprises polyetheramines, tallow amines, tallow diamines, alkylphenol-formaldehyde resins, reaction products of alpha-olefin, maleic anhydride and pentaerythritol, or a combination thereof, with the heavy or extra-heavy crude oil.

Abstract: A composition comprising an alcohol ether sulfonate and a quaternary ammonium salt is provided for use in methods of increasing recovery of crude oil from a subterranean hydrocarbon-containing formation.

Abstract: Methods for removing biofilm or preventing biofilm formation from surfaces are provided, the methods comprising applying compositions to the surface to remove the biofilm or inhibit its formation, the compositions comprising polymers derived from alkyl polyglucosides functionalized with cationic side chains.