It should be noted that while both GETEM and GeoVision appear to have worked separately to develop cost models, the degree of circular referencing between each leads one to the conclusion that there is only one underlying data model. GETEM, prior to ~2012, developed its own bottomup well cost model. Later, GETEM adopted the polynomial cost models shown in this supplemental information, which are each a regression of six unpublished GeoVision data points. Then GeoVision published well cost models, also shown, which are developed from an improved version of the original pre-2012 GETEM bottom-up well cost model. Thus, while substantial work, validation, and improvement has been performed to develop these cost relations, the GETEM, GeoVision, GEOPHIRES, and genGEO relations should not be mistaken for a meta-analysis of more than one independent well cost model.