IN SITU COMBUSTION FOLLOWING PRIMARY RECOVERY PROCESSES UTILIZING HORIZONTAL WELL PAIRS IN OIL SANDS AND HEAVY OIL RESERVOIRS

摘要

The invention provides processes for in situ combustion as a secondaryrecovery techniquefor recovery of oil by a combination of gravity drainage, hot gas drive andenhanced steamdrive, particularly suited to oil sands or heavy oil reservoirs that haveundergone a priorsteam-based gravity-controlled process.