Compositions and methods for enhanced hydrocarbon recovery

摘要

A method of using a fluid formulation for increasing flow, production, or recovery of oil and gas hydrocarbons from a subterranean formation. Components including a peroxygen, surfactant, alkali metal chelate, and a cosolvent into a hydrocarbon bearing subterranean formation having a blockage or accumulation of material. Oxygen or carbon dioxide gas is generated by decomposition of the peroxygen which creates gas pressure in the formation. The formed gas pressure mobilizes, degrades, removes, releases, realigns or redistributes the material causing the blockage or accumulation physically. The aggregate pH of the components is less than about 10 or a concentration of alkali metal chelate is greater than about 0.2% and less than about 5% by weight of non-water components.

主权项

1. A method for enhancing hydrocarbon recovery in a subterranean formation having a blockage or accumulation of material, comprising:
introducing components comprising a) a peroxygen, b) a surfactant, c) an alkali metal chelate, and d) a cosolvent into a hydrocarbon bearing subterranean formation with a blockage or accumulation of material, generating at least one of oxygen gas and carbon dioxide gas via decomposition of the peroxygen to create gas pressure in the subterranean formation, and mobilizing, degrading, removing, releasing, realigning or redistributing the material creating the blockage or accumulation in the subterranean formation physically via generated gas pressure and solubilization by the surfactant, wherein the aggregate pH of the components is less than about 10 and/or a concentration of alkali metal chelate is greater than about 0.2% and less than about 5% by weight of non-water components.