Vertical downward gas-driven miscible blanket flooding oil recovery process

摘要: A vertical downward gas-driven miscible blanket oil recovery process wherein the spreading rate of solvent on top column is increased by adding to or using with conventional a high density such as carbon disulfide, tetrachloride certain halogenated hydrocarbons. Sufficient dense injected along hydrocarbon increase resulting mixture value only slightly less than formation petroleum being displaced, so that stable will be maintained substantially and extent column. The displaced injecting gas natural gas, methane, dioxide into upper portion reservoir. may before after solvent, simultaneously dual injection strings.