The average current at a plurality of measure electrodes of a resistivity imaging tool is determined and subtracted from the individual measure currents to give a resistivity image with improved dynamic range....http://www.google.fr/patents/US7804302?utm_source=gb-gplus-shareBrevet US7804302 - Method and apparatus for enhancing formation resistivity images obtained with downhole galvanic tools
Method and apparatus for enhancing formation resistivity images obtained ...
