Visualizing formation boundaries in near-vertical well drilling

A method of visualizing a formation in a well-drilling operation, the method comprising:

• receiving electromagnetic field data related to a formation from measurements by a downhole tool in a wellbore;
• generating a first inversion slice that represents an inversion of the electromagnetic field data at a first true vertical depth;
• generating a second inversion slice that represents an inversion of the electromagnetic field data at a second true vertical depth;
• generating an inversion stack comprising the first inversion slice and the second inversion slice;
• and
• presenting a user interface comprising the inversion stack for use to determine a distance from the formation to the downhole tool in the wellbore.

A graphical user interface comprising:

• a first graphical user interface element comprising:
• a first inversion slice depicting a first true vertical depth, an upper portion of the first inversion slice at an angle from a virtual vertical axis, and a lower portion of the first inversion slice at the angle from a virtual vertical axis;
• a second inversion slice depicting a second true vertical depth, an upper portion of the second inversion slice at the angle from the virtual vertical axis, and a lower portion of the second inversion slice at the angle from the virtual vertical axis;
• a second graphical user interface element comprising:
• an inversion plot of electromagnetic field data that represents the resistivity of the formation as a function of true vertical depth and measured depth;
• and
• a third graphical user interface element comprising a plot of a quality metric for a plurality of true vertical depths.