Ranging Modeling services use passive-magnetics or active-electromagnetic ranging, which both depend on steel, such as casing or drill string, in the target well. Wellbore positioning is critical in reducing risk and increasing value in well construction. It impacts the entire life cycle of the well, including the ability to efficiently plan and execute a relief well. An understanding of the full cycle of wellbore positioning activities is critical for intercepting geological targets, avoiding adjacent wells and geological hazards, planning relief well trajectories, and managing trajectory positional uncertainty to improve subsurface modeling correlations. It’s important to verify that grid, magnetic declination, and convergence are correct by surveying surface locations directly.