B14 Optimal Economic Strategies for SAGD+Solvent Processes G. Darche* (TOTAL SA) SUMMARY The SAGD process (Steam Assisted Gravity Drainage) is currently favoured for developing bitumen fields and also shows potential to develop mobile heavy oils beyond the economic performances of classical cold production. However to reduce steam injection needs and increase recovery associated to SAGD engineers are trying to improve SAGD by adding extra fluids to the injected steam. One of the most promising techniques ES- SAGD consists in adding condensable solvents to the steam which still reduces the bitumen viscosity and improves the oil recovery. In this paper we


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