Patent ID: 7612566

Claim:
A method of drilling a borehole in an earth formation, the method comprising: (a) conveying a logging tool on a bottom hole assembly (BHA) into said borehole in a selected layer in said formation, said borehole having an axial direction substantially parallel to a boundary of said selected layer, said BHA including a device for drilling of the borehole; (b) using said logging tool to obtain a plurality of multi-component resistivity measurements indicative of resistivities of said earth formation in a vicinity of said borehole, the multi-component measurements including at least one measurement made with a receiver having an axis inclined to an axis of a transmitter; (c) comparing said plurality of multi-component resistivity measurements with expected values of said measurements obtained from a model; and (d) controlling a direction of drilling of said drilling device on said BHA in response to said comparison.