Patent ID: 7336080

Claim:
A method of logging of an earth formation having a horizontal resistivity and a vertical resistivity, the method comprising: (a) conveying a tool into a borehole in said earth formation, said tool having a first transmitter with a first axis and a second transmitter with a second axis inclined to said first axis; (b) transmitting first and second magnetic fields into the earth formation with the first and second transmitters; (c) receiving first and second magnetic fields resulting from the first and second transmitted magnetic fields respectively; (d) processing components of the first and second received magnetic fields substantially in phase with the transmitted first and second magnetic fields respectively without using components of the first and second received magnetic fields substantially in quadrature with the first and second transmitted magnetic fields respectively to determine a horizontal resistivity and a vertical resistivity of the earth formation, and (e) recording at least one of the horizontal resistivity and the vertical resistivity on a suitable medium.