Abstract: The disclosure relates to methods to increase production of a hydrocarbon from an underground formation by injecting a mixture containing an ether and carbon dioxide. The composition of the mixture, a pressure for injecting the mixture, a duration of an injection time, a duration of a time delay between injection of the mixture and producing the hydrocarbon, a pressure for producing the hydrocarbon, a duration of a production time and/or a number of cycles of injection and production can be selected (e.g., optimized) using simulations to enhance (e.g., maximize) recovery of the hydrocarbon and/or sequestration of carbon dioxide in the underground formation.