Increasing the resolution of electromagnetic tools for resistivity evaluations in near borehole zones

Increasing the resolution of electromagnetic tools for resistivity evaluations in near borehole zones

A tool for performing electromagnetic measurements within a borehole includes a transmitter including a coil having N-turns wound coaxially around a long metallic mandrel and a receiver including a coil having a one-turn receiving loop wound coaxially around the mandrel; wherein the transmitter is a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BORISOV GLEB A, DASHEVSKY YULIY A, EPOV MICHAIL I
Format: Patent
Sprache:eng
Schlagworte:
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:A tool for performing electromagnetic measurements within a borehole includes a transmitter including a coil having N-turns wound coaxially around a long metallic mandrel and a receiver including a coil having a one-turn receiving loop wound coaxially around the mandrel; wherein the transmitter is adapted for providing a current I of a predetermined frequency f of a maximum intensity in a predetermined part of a near borehole zone; and wherein the receiver is disposed a distance L from the transmitter and adapted for receiving a signal from the transmitter. A method for use of the tool is provided.