Borehole diameter and lateral depth of fluid invasion indicator

Claim 1

IN AN ELECTRICAL WELL LOGGING SYSTEM WHEREIN MEANS INCLUDING A CURRENT ELECTRODE AND A POTENTIAL DETECTOR RESPECTIVELY ESTABLISH AN ELECTRIC FIELD BY CURRENT FLOW AT A FIRST POINT IN A WELL BORE AND PROBE SAID ELECTRIC FIELD AT A SECOND POINT AND WHEREIN SAID ELECTRODE AND DETECTOR ARE SUPPORTED FOR MOVEMENT ALONG SAID WELL BORE TO VARY THE DEPT OF SAID POINTS FOR PRODUCING ON A RECORD ELEMENT A PLOT OF THE ELECTRICAL CHARACTER OF EARTH FORMATIONS, THE COMBINATION WHICH COMPRISES MEANS FOR VARYING THE SPACING OF SAID POINTS BETWEEN TWO DIFFERENT VALUES, MEANS INCLUDING TRANSLATING AND REGISTERING MEANS CONNECTED TO SAID POTENTIAL ELECTRODE FOR PRODUCING A SCALAR OUTPUT HAVING A MAGNITUDE DEPENDENT UPON SAID ELECTRIC FIELD AND SAID SPACING, MEANS FOR ADJUSTING THE POSITION OF SAID REGISTERING MEANS ALONG A FIRST DIMENSION OF SAID RECORD ELEMENT IN PROPORTION TO THE DEPTH OF SAID POINTS IN SAID WELL BORE, AND MEANS FOR ADJUSTING THE POSITION OF SAID REGISTERING MEANS ALONG A SECOND DIMENSION OF SAID RECORD ELEMENT IN PROPORTION TO THE VALUE OF SAID SPACING BETWEEN SAID POINTS FOR REGISTERING SAID SCALAR OUTPUT AT A SITUS ON SAID ELEMENT DEPENDENT UPON SAID DEPTH AND SAID SPACING.