drains from the saturated steam area and from the chamber walls condensed water and bitumen are collected by the lower horizontal well and conveyed or pumped to the surface please see fig3 a through d in this regard fig3 shows one geometry suitable for sagdox a sagd horizontal well pair wells 1 and 2 has been augmented by 3 new vertical sagdox wells u2014 2 wells to remove non condensable combustion gases wells 3 and 4 and a separate oxygen injection well well 5 the vertical gas remover wells are on the pattern boundary and are shared by neighbor patterns i e only 1 net well an oxygen injection well well 5 is near the sagd toe and completed low enough in the pay zone to ensure that oxygen injection is into a steam swept zone the produced gas removal wells are operated separately to control conformance and reservoir pressure while minimizing production of steam and or unused oxygen oxygen and steam injection are controlled to attain oxygen steam ratio targets oxygen u201c concentration u201d and energy injection rates the bitumen water production well is controlled assuming saturated conditions using steam trap control without producing significant amounts of live steam non condensable combustion gases or unused oxygen the sagdox process may be considered.