Directional induction logging for evaluating layered magnetic formations-Reference-Cited by-同舟云学术

Directional induction logging for evaluating layered magnetic formations

Published:2002-03 Issue:2 Volume:67 Page:427-437
ISSN:0016-8033
Container-title:GEOPHYSICS
language:en
Short-container-title:GEOPHYSICS

Author:

Cheryauka Arvidas B.¹,Sato Motoyuki²

Affiliation:

1. Formerly Tohoku University, Center for Northeast Asian Studies, Sendai 980-8576, Japan; presently University of Utah, Geology and Geophysics Department, 135 South 1460 East, Room 719, Salt Lake City, Utah 84112.

2. Tohoku University, Center for Northeast Asian Studies, Sendai 980-8576, Japan.

Abstract

We present a modeling study to investigate the ability of directional induction logging to evaluate magnetic properties of formations. Simultaneous measurement of in-phase and quadrature components of electromotive force, or R- and X-signals, respectively, gives complete information about both the electrical resistivity and the magnetic susceptibility of the formation. We describe an approach for designing a directional induction tool with tilted transmitting and receiving coils. We discuss spatial resolution using directional excitation–measurement and evaluation of formation parameters. The proposed method can detect magnetic susceptibility inhomogeneity in addition to electrical resistivity inhomogeneity using the X-signal. The X-signal log response reflects abrupt changes in magnetic properties, with sharp gradients located in the vicinity of magnetic susceptibility interfaces.

Publisher

Society of Exploration Geophysicists

Subject

Geochemistry and Petrology,Geophysics

Link

https://library.seg.org/doi/pdf/10.1190/1.1468602

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