CA2359371A1 - Electromagnetic wave resistivity tool having tilted antenna - Google Patents

Electromagnetic wave resistivity tool having tilted antenna Download PDF

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Publication number
CA2359371A1
CA2359371A1 CA002359371A CA2359371A CA2359371A1 CA 2359371 A1 CA2359371 A1 CA 2359371A1 CA 002359371 A CA002359371 A CA 002359371A CA 2359371 A CA2359371 A CA 2359371A CA 2359371 A1 CA2359371 A1 CA 2359371A1
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CA
Canada
Prior art keywords
antenna
plane
electromagnetic wave
resistivity tool
wave resistivity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002359371A
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French (fr)
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CA2359371C (en
Inventor
Michael S. Bittar
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Halliburton Energy Services Inc
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Publication of CA2359371A1 publication Critical patent/CA2359371A1/en
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Publication of CA2359371C publication Critical patent/CA2359371C/en
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Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
    • G01V3/28—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils

Abstract

This invention is directed to a downhole method and apparatus for simultaneously determining the horizontal resistivity, vertical resistivity, and relative dip angle for anisotropic earth formations. The present invention accomplishes this objective by using an antenna configuration in which a transmitter antenna (T1) and a receiver antenna (R1) are oriented in non-parallel planes such that the vertical resistivity and the relative dip angle are decoupled. Preferably, either the transmitter or the receiver is mounted in a conventional orientation in a first plane that is normal to the tool axis, and the other antenna is mounted in a second plane that is not parallel to the first plane.
Although this invention is primarily intended for MWD or LWD
applications, this invention is also applicable to wireline applications.
CA002359371A 1999-01-28 2000-01-24 Electromagnetic wave resistivity tool having tilted antenna Expired - Lifetime CA2359371C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/238,832 1999-01-28
US09/238,832 US6163155A (en) 1999-01-28 1999-01-28 Electromagnetic wave resistivity tool having a tilted antenna for determining the horizontal and vertical resistivities and relative dip angle in anisotropic earth formations
PCT/US2000/001693 WO2000045195A1 (en) 1999-01-28 2000-01-24 Electromagnetic wave resistivity tool having tilted antenna

Publications (2)

Publication Number Publication Date
CA2359371A1 true CA2359371A1 (en) 2000-08-03
CA2359371C CA2359371C (en) 2004-10-05

Family

ID=22899518

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002359371A Expired - Lifetime CA2359371C (en) 1999-01-28 2000-01-24 Electromagnetic wave resistivity tool having tilted antenna

Country Status (6)

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US (6) US6163155A (en)
EP (3) EP1155343B2 (en)
AT (1) ATE520998T1 (en)
CA (1) CA2359371C (en)
NO (2) NO331402B1 (en)
WO (1) WO2000045195A1 (en)

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