A method of recovering energy from a subsurface hydrocarbon containing formation
includes introducing an oxidizing fluid in a wellbore positioned in at least a first portion of the …

Abstract Systems, methods, and heaters for treating a subsurface formation are described
herein. At least one system for providing power to one or more subsurface heaters is …

A heater includes a conduit and three insulated electrical conductors located in the conduit.
At least one of the three insulated conductors includes an electrical conductor at least …

An oil shale formation may be treated using an in situ thermal process. Heat may be applied
to the formation to raise a temperature of a portion of the formation to a pyrolysis …

A method for treating a tar sands formation includes providing heat from a first heater located
between a steam injection well and a production well in a hydrocarbon containing layer. The …

A system for treating a subsurface hydrocarbon containing formation includes one or more
shafts. A first substantially horizontal or inclined tunnel extends from one or more of the …

A plurality of first barrier wells are formed in a formation for a first barrier. A substantially
constant spacing separates adjacent first barrier wells. The formation is analyzed to …

A system for treating a subsurface hydrocarbon containing formation includes one or more
shafts. At least two substantially horizontal or inclined tunnels extend from one or more of the …

A method for heating a subsurface formation includes applying heat from a plurality of
heaters to at least a portion of the subsurface formation. A portion of one or more of the …

A system for treating a subsurface hydrocarbon containing formation includes one or more
tunnels having an average diameter of at least 1 m. At least one tunnel is connected to the …