Downhole Three Component TEM Probes

J.P. Cull

doi:10.1071/EG993437

ISSN: 0812-3985
E-ISSN: 1834-7533

Downhole Three Component TEM Probes
Authors J.P. Cull^a
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^a Department of Earth SciencesMonash University, Clayton, VIC, 3168
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 24, Issue 3-4, Sep 1993, p. 437 - 441
DOI: https://doi.org/10.1071/EG993437
- Published online: 01 Sep 1993

Abstract

A three component transient electromagnetic (TEM) probe (VECTEM) has been constructed to eliminate rotational ambiguities associated with data obtained along a single axis. Individual components are obtained sequentially using a surface adapter for multiplexing to any standard TEM recorder. The critical rotation angles are also indicated by this surface unit and are recorded in the data header. Data have been obtained for several sites and interpretations have been generated using filament inversion routines. The results agree in general with previous axial data and are consistent with geological constraints. However noise levels are higher than expected compared to single-component probes and anomalies confined to late windows may remain obscured.

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1993-09-01

2026-01-23

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References

Barnett, C.T. (1984), ‘Simple inversion of TDEM data’. Geophysics49, 925–933.
Cull, J.P. and Cobcroft, R. (1986), ‘Omni-directional down-hole EM probes’. Geophysical Prospecting34, 569–579.
Duncan, A.C. (1987), ‘Interpretation of down-hole transient EM data using current filaments’. Explor. Geophys.18, 36–39.
Duncan, A.C. and Cull, J.P (1988), ‘Three-component downhole TEM surveys’. Explor. Geophys.19, 51–53.

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Article Type: Research Article

Keyword(s): downhole; filament inversion; orthogonal sensors; TEM probes

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Downhole Three Component TEM Probes

Abstract

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