Table shows geothermal well relationships compared to determine the genGEO relationship. The GeoVision "Baseline" and "Ideal" vertical well cost models represent the current state-of-theart well costs and the theoretical minimum cost, respectively. GeoVision also reports intermediate cost models and horizontal wells that are not compared in this study. The GeoVision curves are derived from published figures in Lowry et al. (2017). Two well diameters are commonly used by GETEM, GEOPHIRES, and GeoVision for analysis: Small Diameter (i.e. SD or 21.6 cm or 8.5 inch diameter) and Large Diameter (i.e. LD or 31.1 cm or 12.25 inch diameter).