Methods and apparatus for investigating earth formations utilizing weighting factors varied as a function of a formation characteristic

Claim 1

APPARATUS FOR USE WITH A BOREHOLE LOGGING SYSTEM WHEREIN A SENSING SYSTEM IS MOVED THROUGH THE BOREHOLE TO DEVELOP SIGNALS REPRESENTATIVE OF A CHARACTERISTIC OF THE ADJACENT FORMATION MATERIAL AT DIFFERENT DEPTHS IN THE BOREHOLD, THE APPARATUS COMPRISING: MEANS FOR TRANSLATING THESE SIGNALS OBTAINED AT DIFFERENT BOREHOLE DEPTHS INCLUDING MEANS FOR APPLYING DIFFERENT WEIGHING FACTORS TO AT LEST TWO OF THESE SIGNALS DURING SUCH TRANSLATION AND MEANS FOR VARYING AT LEAST ONE OF THESE WEIGHTING FACTORS AS A FUNCTION OF THE FORMATION CHARACTERISTIC IN THE VICINITY OF AT LEAST ONE OF THE DEPTHS CORRESPONDING TO ONE OF THE SIGNALS BEING TRANSLATED; AND MEANS FOR COMBINING THESE TRANSLATED SIGNALS TO DEVELOP A RESULTANT SIGNAL PROVIDING AN IMPROVED INDICATION OF THE DESIRED FORMATION CHARACTERISTIC.