| 摘要 |
A LOGGING ASEMBLY FOR APPLICATION INA WELLBORE FORMED IN AN EARTH FORMATION IS PROVIDED. THE ASSEMBLY COMPRISES A CASING (1) SUITABLE TO BE LOWERED THROUGH THE WELLBORE AND TO BE ARRANGED IN A SELECTED PART THEREOF, AND A NMR LOGGING DEVICE COMPRISING MAGNETISING MEANS FOR INCLUDING A MAGNETIC FIELD INTO A SELECTED ZONE OF THE EARTH FORMATION ANTENNA MEANS FOR TRANSMITTING RADIO-FREQUENCY (RF) SIGNALS INTO THE SELECTED ZONE AND FOR RECEIVING RESPONSE RF SIGNALS FROM THE SELECTED ZONE, AND DATA COLLECTING MEANS FOR COLLECTING DATA REPRESENTING THE RESPONSE RF SIGNALS, WHICH DATA COLLECTING MEANS IS REMOVABLY ARRANGED IN THE INTERIOR OF THE CASING (1). THE MEANS FOR INDUCING THE MAGNETIC FIELD INCLUDES A MAGNETISED SECTION (3) OF THE CASING.(FIG. 1)
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