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Book Chapter

Modeling Induction Logs in 3-D Geometries

By
M. van der Horst
M. van der Horst
RTS, Shell Research, Volmerlaan 6, Rijswijk 2280 AB, The Netherlands.
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V. Druskin
V. Druskin
Schlumberger-Doll Research, Ridgefield, CT 06877-4108, USA.
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L. Knizhnerman
L. Knizhnerman
Central Geophysical Expedition, Narodnogo Opolcheniya Street, House 40, Moscow 123298, Russia.
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Published:
January 01, 1999

Summary

The spectral Lanczos decomposition method gives a very efficient finite-difference solution of Maxwell’s equations in the diffusive limit. We have adapted this method to simulate borehole induction logging with an array tool used in oil and gas exploration. The tool has a magnetic point dipole transmitter operating at several frequencies and receiver dipoles located at different distances from the transmitter. Numerical examples show that effects of the borehole, invasion, and eccentricity of the tool in the hole are important to the proper interpretation of real logs.

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Contents

Geophysical Developments Series

Three-Dimensional Electromagnetics

Society of Exploration Geophysicists
Volume
7
ISBN electronic:
9781560802154
Publication date:
January 01, 1999

GeoRef

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