Patent ID: 9410405
Filing Date: 2016-08-09
CPC Classification: C09K,E21B

Claim Text:
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.