HEAVY OIL RECOVERY PROCESS USING INTERMITTENT STEAMFLOODING

摘要

HEAVY OIL RECOVERY PROCESS USING INTERMITTENT STEAMFLOODINGABSTRACTThis invention is a method for recovering viscoushydrocarbonaceous fluids from a subterranean formation containingone or more vertically extensive, narrow, high permeabilityconduits. At least one injection well communicates with at leastone production well via said conduits. Steam is injected into saidinjection well until the water-oil ratio becomes excessive at theproduction well. The production well is then shut in until theformation is pressurized. Steam injection is then stopped and theproduction well is opened for production by pressure depletion.This cycle is repeated until oil recovery becomes uneconomical.