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Title: Tall oil as additive in gas drive hydrocarbon oil recovery

A miscible displacement process for recovering oil from a subterranean, oil-containing formation penetrated by at least one injection well and at least one spaced-apart production well and having fluid communication between the injection and the production wells is described comprising: (a) injecting a slug of til oil into the formation through the injection well; (b) injecting a slug of a displacing fluid into the formation through the injection well, the displacing fluid being selected from the group consisting of carbon monoxide, carbon dioxide, methane, nitrogen, air, flue gas, combustion gas and mixtures thereof, the injection of the tall oil lowering the minimum miscibility pressure of the displacing fluid in the formation oil; and (c) recovering the oil through the production well.
Authors:
Publication Date:
OSTI Identifier:
5075756
Report Number(s):
US 4736793
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 31 Dec 1985
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; DISPLACEMENT FLUIDS; CHEMICAL COMPOSITION; OIL WELLS; GAS INJECTION; MISCIBLE-PHASE DISPLACEMENT; TALL OIL; ADDITIVES; AIR; CARBON DIOXIDE; CARBON MONOXIDE; ENHANCED RECOVERY; FLUE GAS; METHANE; NITROGEN; PETROLEUM; WELL STIMULATION; ALKANES; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; ELEMENTS; ENERGY SOURCES; FLUID INJECTION; FLUIDS; FOSSIL FUELS; FUELS; GASEOUS WASTES; GASES; HYDROCARBONS; NONMETALS; OILS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RECOVERY; STIMULATION; WASTES; WELLS 020300* -- Petroleum-- Drilling & Production