A gas burner assembly for heating a subsurface formation includes an oxidant conduit, a fuel conduit, and {HEAD ~ a plurality} of {TAIL ~ oxidizers} coupled to the oxidant conduit 
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A gas burner assembly for heating a subsurface formation includes an oxidant conduit , a fuel conduit , and { HEAD ~ a plurality } of { TAIL ~ oxidizers } coupled to the oxidant conduit
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH