NOVELTY - A system (100) comprises: at least one pipe system defining a closed-loop fluid conduit configured to circulate a fluid into a cased well (116) and through at least a portion of a subterranean thermal reservoir (114) to heat the fluid; and a thermal power system coupled to at least one pipe system and configured to generate electricity from heat carried by the fluid.    USE - As system for geothermal electricity generation (claimed).    ADVANTAGE - The system provides an efficient, environmentally friendly, renewable energy system to produces energy from hot formations without depleting the formation fluids, thereby providing a sustainable energy generation system.    DETAILED DESCRIPTION - A system (100) comprises: at least one pipe system defining a closed-loop fluid conduit configured to circulate a fluid into a cased well (116) and through at least a portion of a subterranean thermal reservoir (114) to heat the fluid; and a thermal power system coupled to at least one pipe system and configured to generate electricity from heat carried by the fluid. The system comprises: a pipe system configured to provide a closed-loop fluid conduit for carrying a fluid from a surface through a first well bore (118) associated with a cased well (116) and through at least a portion of a subterranean thermal reservoir and back to the surface through a second well bore (122) associated with a second cased well (120); an electrical generator (142) coupled to the pipe system and configured to generate electricity from heat carried by the fluid; and a control system coupled to the electrical generator to control delivery of the electricity to a destination. INDEPENDENT CLAIMS are included for the following:    (1) generating electricity involving circulating a fluid through a closed-loop pipe system having a portion that extends into a cased well and through a subterranean thermal reservoir to heat the fluid; circulating the fluid through a second portion of the closed-loop pipe system that extends through a thermal-electric generator to convert heat carried by the fluid into electricity; and supplying the electricity to a destination; and    (2) forming a geothermal electricity generation system, involving: drilling a first substantially lateral hole from a bottom of a first cased well toward a second cased well through a subterranean thermal reservoir to a pre-determined percentage of a distance between the first cased well and the second cased well; extending piping having a magnetic tip through the first cased well and to the pre-determined percentage of the distance within the first substantially lateral hole; drilling a second lateral hole from a bottom of the second cased well toward the magnetic tip of the piping through a subterranean thermal reservoir until the second lateral hole intersects the first substantially lateral hole; pulling the piping through the second lateral hole and through the second cased well; and connecting the piping to a pipe system, where the pipe system for coupling the first cased well and the second cased well to form a closed-loop fluid conduit includes the piping.    DESCRIPTION OF DRAWING(S) - The figure shows partial block diagram and partial cross-sectional diagram of a system.    System (100)    Subterranean thermal reservoir (114)    Well (116)    First well bore (118)    Second well (120)    Second well bore (122)    Electrical generator (142)    Control system (144)