Compositions for enhanced oil recovery

A method of increasing recovery of a hydrocarbon from a subterranean reservoir, the method comprising:

• combining a concentrate consisting essentially of a dialkyl dimethyl ammonium surfactant or a mixture of two or more thereof, an amphoteric surfactant or a mixture of two or more thereof, and a coupling agent or a mixture of two or more thereof with a water source to form an injectate, the injectate comprising 10 ppm to 10,000 ppm total surfactant based on the weight of the injectate;
• injecting the injectate into the subterranean reservoir;
• and
• collecting a hydrocarbon from the subterranean reservoir.

A composition consisting essentially of:

• (a) a dialkyl dimethyl ammonium surfactant or a mixture of two or more thereof;
• (b) an amphoteric surfactant or a mixture of two or more thereof;
• (c) a solvent selected from a water source, a coupling agent, or a mixture of two or more thereof;
• and
• (d) a demulsifier, a proppant, or a combination thereof,
• wherein the demulsifier is selected from the group consisting of polyethylenimine alkoxylates, alkoxylated alkylphenol formaldehyde resins, alkoxylated amine-modified alkylphenol formaldehyde resins, ethylene oxide/propylene oxide copolymers, crosslinked ethylene oxide/propylene oxide copolymers, and mixtures of two or more thereof.