Deep Steam Injection Systems and Methods

A method of producing oil from a subterranean oil reservoir, the method comprising:

• supplying a water stream to a fluid heating assembly;
• supplying a noncondensable gas stream to the fluid heating assembly;
• heating the water stream and the noncondensable gas stream at the fluid heating assembly;
• generating a combined stream from the fluid heating assembly at a combined stream total pressure, wherein the combined stream includes at least steam and the noncondensable gas and further wherein the combined stream total pressure includes at least a steam partial pressure and a noncondensable gas partial pressure;
• supplying at least a portion of the combined stream to a subterranean oil reservoir;
• and
• producing oil from the subterranean oil reservoir.

A method of recovering oil from a subterranean oil reservoir that includes a wellbore, the method comprising:

• supplying a water stream to a fluid heating assembly to produce a steam stream;
• supplying a noncondensable gas stream to the fluid heating assembly;
• generating a combined stream at the fluid heating assembly at a combined stream total pressure that exceeds the critical pressure of water, wherein the combined stream total pressure includes at least a steam partial pressure and a noncondensable gas partial pressure, and further wherein the steam partial pressure is less than the critical pressure of water;
• supplying at least a portion of the combined stream to the subterranean oil reservoir;
• and
• producing oil from the subterranean oil reservoir.