Directional resistivity measurement for well placement and formation evaluation

A system to determine a formation property of a subsurface formation, comprising:

• a downhole logging tool having two or more antennas, at least two of the antennas having a transversely-sensitive element and an axially-sensitive element;
• and
• a processor capable of:
• obtaining azimuthally-sensitive measurements using the antennas of the downhole logging tool;
• fitting the measurements to a Fourier series having Fourier coefficients that include channel gains, if any;
• determining a DC component, a first harmonic component, and a second harmonic component from the Fourier series;
• determining a measurement type using the DC component, the first harmonic component, and/or the second harmonic component;
• and
• determining the formation property of the subsurface formation using the determined measurement type.

A system having a computer-readable medium having a set of computer-readable instructions encoded thereon that, when executed, perform acts comprising:

• obtaining azimuthally-sensitive measurements using the antennas of the downhole logging tool;
• fitting the measurements to a Fourier series having Fourier coefficients that include channel gains, if any;
• determining a DC component, a first harmonic component, and a second harmonic component from the Fourier series;
• determining a measurement type using the DC component, the first harmonic component, and/or the second harmonic component;
• and
• determining the formation property of the subsurface formation using the determined measurement type.