Figure shows the GETEM costs tend to be higher than the other well models, especially at great depth. Also, the Klein et al. (2004) cost relationship consistently predicts a well cost approximately 50% greater than the average. The genGEO cost curves tend to be within 10% of the average, except at shallow depths where the genGEO curves are greater than average. This exception is due to the negative y-intercepts of the Lukawski et al. (2014) and GeoVision LD curves, which provide unrealistically low well costs at shallow depths. Thus, the genGEO model is better suited for a large range of well depths and diameters.