Modeling of the Dielectric Logging Tool at High Frequencies: Applications and Results

Weng Cho Chew

Research output: Contribution to journalArticle

Abstract

The high-frequency dielectric logging tool is useful in electromagnetic well logging, because by measuring the dielectric constants of rock formations at high frequencies (1 GHz), the water saturation of rocks could be inferred without knowing the water salinity in the rocks. In this paper, we present the results of a theoretical model presented in the previous paper. We use our theoretical model to study the behavior of such a tool across geological sedimentary beds. We also study the effect of using different polarizations on the measurement. Furthermore, we study the standoff and mudcake effects that reflect on the depth of investigation of such a tool. Finally, we study the use of borehole compensation modes in the measurements. We find that the TE polarization is more robust than the TM polarization in terms of mudcake and standoff effects. Also, the standoff effect affects the measurement more severely than the mudcake effect. Shorter receiver spacings give rise to a higher resolution in the measurement. Borehole compensation results in a slight loss of resolution, and horns in the logs are removed.

Original languageEnglish (US)
Pages (from-to)388-398
Number of pages11
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume26
Issue number4
DOIs
StatePublished - Jul 1988

Fingerprint

Well logging
Rocks
Polarization
Boreholes
polarization
modeling
borehole
rock
well logging
Water
Permittivity
spacing
effect
saturation
Compensation and Redress
water

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Earth and Planetary Sciences(all)

Cite this

Modeling of the Dielectric Logging Tool at High Frequencies : Applications and Results. / Chew, Weng Cho.

In: IEEE Transactions on Geoscience and Remote Sensing, Vol. 26, No. 4, 07.1988, p. 388-398.

Research output: Contribution to journalArticle

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