Single well in-situ combustion process for production of oil

Claim 1

AN IN-SITU COMBUSTION PROCESS UTILIZING A SINGLE WELL FOR THE PRODUCTION OF OIL FROM A PAY ZONE COMPRISING FORMING A FRACTURE IN THE PAY ZONE, PUMPING A LIQUID INTO THE FRACTURE TO EXTEND THE FRACTURE SUBSTANTIALLY RADIALLY FROM THE WELL AT LEAST ABOUT 50 FEET INTO THE PAY ZONE, SAID FRACTURE BEING POSITIONED IN THE CENTRAL PORTION OF THE PAY ZONE, SQUEEZING CEMENT INTO THE FRACTURE AND ALLOWING IT TO SET TO FORM A THIN IMPERMEABLE BARRIER EXTENDING FROM THE WELL AND DIVIDING THE PAY ZONE INTO AN UPPER AND LOWER SECTION, SETTING A PACKER IN THE WELL ADJACENT THE BARRIER TO DIVIDED THE WELL INTO AN UPPER ZONE ABOVE THE PACKER AND A LOWER ZONE BELOW THE PACKER, RUNNING TUBING INTO THE WELL AND THROUGH THE PACKER TO PROVIDED A CONDUIT FROM THE WELL HEAD TO THE LOWER ZONE, INJECTING AN OXYGEN-CONTAINING GAS DOWN THE WELL AND INTO ONE OF THE SECTIONS OF THE PAY ZONE, IGNITING AND BURNING OIL IN THAT SECTION INTO WHICH THE OXYGEN-CONTAINING GAS IS INJECTED TO INCREASE THE TEMPERATURE THEREIN AND DISPLACE OIL TOWARD THE OTHER SECTION OF THE PAY ZONE, WITHDRAWING OIL FROM THE OTHER SECTION OF THE PAY ZONE INTO THE WELL AND LIFTING IT TO THE WELL HEAD, STOPPING THE INJECTION OF OXYGEN-CONTAINING GAS INTO SAID ONE SECTION, INJECTING OXYGEN-CONTAINING GAS INTO SAID OTHER SECTION, IGNITING OIL IN SAID OTHER SECTION, AND WITHDRAWING OIL FROM THE SECTION OF THE PAY ZONE IN WHICH THE BURNING INITIALLY OCCURRED TO CAUSE ALTERNATE BURNING AND WITHDRAWAL OF OIL IN THE SECTIONS.