Patent ID: 8636323
Filing Date: 2014-01-28
Classification: C10G,E21B

Abstract:
1. A system for treating a subsurface hydrocarbon containing formation, comprising: one or more substantially horizontal or inclined tunnels extending from at least one shaft; one or more heat sources located in one or more wellbores coupled to at least one of the substantially horizontal or inclined tunnels, wherein at least a portion of at least one of the heat source wellbores is positioned substantially horizontally in the formation, wherein at least one of the heat source wellbores extends between two of the substantially horizontal or inclined tunnels, and wherein at least some part of the at least one heat source wellbore is located in a portion of the subsurface hydrocarbon containing formation below the two substantially horizontal or inclined tunnels; and one or more transformers electrically coupled to one or more of the heat sources, at least one of the transformers being located in at least one of the tunnels, the tunnel with at least one of the transformers being a different tunnel than the tunnel coupled to the wellbores with the heat sources.