Fast-SAGD, a modification of the SAGD process, makes use of additional single horizontal wells alongside the SAGD well pair to expand the steam chamber laterally. This method uses fewer wells and could reduce costs compared to a SAGD operation requiring paired parallel wells one above the other. In this study, the Fast-SAGD process has been optimized through numerical reservoir simulations for the three typical oil sands areas in Alberta: Athabasca, Cold Lake, and Peace River. Two key reservoir parameters, reservoir thickness and vertical permeability, were screened under various operating conditions to characterize the optimal reservoir and operating conditions for the Fast-SAGD process. Economic analysis was then used for optimizing the Fast-SAGD operating conditions. In most cases, the simulation results indicated improved energy efficiency and productivity for the Fast-SAGD process. In those cases, the project economics were enhanced compared to the SAGD process. Both Cold Lake- and Peace River-type reservoirs are good candidates for Fast-SAGD. In shallow Athabasca-type reservoirs, which are thick with high permeability, Fast-SAGD was shown to be almost as good as SAGD. This new process demonstrates improved efficiency and lower costs for extracting heavy oil from these important reservoirs.