METHODS OF PRODUCING HYDROCARBONS FROM A WELLBORE UTILIZING OPTIMIZED HIGH-PRESSURE WATER INJECTION

摘要

A method of recovering hydrocarbons from a subterranean formation includes placing a wellbore in the formation, wherein the wellbore is approximately horizontal in the formation; forming one or more fractures in the formation in fluid communication with the wellbore; recovering hydrocarbons from the formation through the wellbore; injecting a volume of fluid comprising greater than 98 mass % water and greater than 0.005 mass % active surfactant into the formation through the wellbore, wherein at least 10 mass% of said volume is injected at a bottom hole pressure at the heel of the wellbore that is less than the minimum horizontal stress in at least a portion of the overburden and at least 5 mass% of said volume is injected at a bottom hole pressure at the heel of the wellbore that is greater than the median minimum horizontal stress in the subterranean formation; and subsequently recovering in situ hydrocarbons from the subterranean formation.