Abstract: A SAGDOX process to recover liquid hydrocarbons from at least one thin pay zone in a hydrocarbon bitumen reservoir, via a substantially horizontal production well, where the hydrocarbon bitumen reservoir has a top and a bottom. The process includes: i) Injecting steam into the hydrocarbon bitumen reservoir above the substantially horizontal production well; ii) Injecting oxygen into the hydrocarbon bitumen reservoir above the substantially horizontal production well; iii) Recovering liquid hydrocarbon via gravity drainage into the substantially horizontal production well.

Abstract: A steam assisted gravity drainage with injected oxygen (SAGDOX) process to recover hydrocarbons in a hydrocarbon reservoir including: (a) starting the SAGDOX process at a first oxygen to steam ratio; (b) measuring a produced water to oil ratio (v/v) PWOR associated with the first oxygen to steam ratio; (c) adjusting the oxygen to steam ratio to obtain a predetermined PWOR; and (d) continuing steps (a) to (c) until a target PWOR is obtained improving the hydrocarbon recovery rate.