Patent ID: 9134449
Filing Date: 2015-09-15
Classification: G01V

Abstract:
1. A method to determine a formation property of a subsurface formation, comprising: providing a downhole logging tool having two or more antennas, wherein at least one of the two or more antennas is a multi-axial antenna comprising: obtaining azimuthally-sensitive measurements using the antennas of the downhole logging tool; fitting the measurement to a Fourier series having Fourier coefficients that include channel gains; determining a DC component, a first harmonic component, and a second harmonic component from the Fourier series; determining a measurement type using at least one of the DC component, the measurement type comprising at least one of symmetrized cross-component measurements, anti-symmetrized cross component measurements, resistivity harmonic measurements and resistivity anisotropy; and determining the formation property of the subsurface information using the determined measurement type, wherein the DC component is directly proportional to (XX+YY)/2, and wherein X is representative of a transverse axis and Y is representative of an axis perpendicular to the transverse axis.