Method for improving the accuracy of mud angle measurements in borehole imagers

A method for estimating a mud angle, comprising:

• disposing a downhole tool into a borehole;
• energizing a button array, wherein the button array comprises at least one electrode;
• transmitting a current from the electrode into a formation;
• recording the current from the formation with a return electrode to obtain a plurality of measurements;
• identifying at least one low resistivity zone from the plurality of measurements;
• producing a measurement set from the at least one low resistivity zone;
• identifying a mud effect in the at least one low resistivity zone;
• inverting the measurement set to find a mud angle vector wherein the mud angle vector minimizes the difference between the responses at the plurality of frequencies and is based at least in part on the mud effect in the at least one low resistivity zone;
• removing the mud angle vector from the plurality of measurements to obtain a plurality of corrected measurements;
• and
• obtaining an electrical image using the plurality of corrected measurements.