CA2185029A1 - A borehole measurement system employing electromagnetic wave propagation - Google Patents

A borehole measurement system employing electromagnetic wave propagation

Info

Publication number
CA2185029A1
CA2185029A1 CA002185029A CA2185029A CA2185029A1 CA 2185029 A1 CA2185029 A1 CA 2185029A1 CA 002185029 A CA002185029 A CA 002185029A CA 2185029 A CA2185029 A CA 2185029A CA 2185029 A1 CA2185029 A1 CA 2185029A1
Authority
CA
Canada
Prior art keywords
borehole
drilling
interest
determination
electromagnetic wave
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
CA002185029A
Other languages
French (fr)
Other versions
CA2185029C (en
Inventor
Larry W. Thompson
Macmillan M. Wisler
Wallace Harold Meyer, Jr.
Jian-Qun Wu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baker Hughes Holdings LLC
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US08/212,194 external-priority patent/US5469062A/en
Priority claimed from US08/214,343 external-priority patent/US5574374A/en
Priority claimed from US08/214,916 external-priority patent/US5811972A/en
Application filed by Individual filed Critical Individual
Priority claimed from PCT/US1995/002814 external-priority patent/WO1995024663A1/en
Publication of CA2185029A1 publication Critical patent/CA2185029A1/en
Application granted granted Critical
Publication of CA2185029C publication Critical patent/CA2185029C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

This invention is directed toward the determination of geophysical parameters of earth formations penetrated by a borehole. The invention is more particularly directed toward the determination of geophysical properties from measures of electromagnetic properties of earth formations in the vicinity of a borehole either during the drilling of the borehole or subsequent to the drilling of the borehole.
The downhole instrument component comprises one or more transmitters and a plurality of receivers axially spaced along a downhole subassembly, and is preferably conveyed along the borehole by means of a drill string. Improved electronic circuitry and data processing methods are used to eliminate the adverse effects of impedance changes and mutual coupling of the receiving antennas. Parallel data processing methods are used to minimize propagation of systematic errors in computed parameters of interest. The quality of the measured and computed parameters of interest are also monitored.
CA002185029A 1994-03-11 1995-03-07 A borehole measurement system employing electromagnetic wave propagation Expired - Lifetime CA2185029C (en)

Applications Claiming Priority (13)

Application Number Priority Date Filing Date Title
US08/212,194 1994-03-11
US08/212,194 US5469062A (en) 1994-03-11 1994-03-11 Multiple depths and frequencies for simultaneous inversion of electromagnetic borehole measurements
US21226994A 1994-03-14 1994-03-14
US21225794A 1994-03-14 1994-03-14
US21221294A 1994-03-14 1994-03-14
US08/212,269 1994-03-14
US08/214,343 US5574374A (en) 1991-04-29 1994-03-14 Method and apparatus for interrogating a borehole and surrounding formation utilizing digitally controlled oscillators
US08/214,916 US5811972A (en) 1991-04-29 1994-03-14 Method and apparatus for determining influence of mutual magnetic coupling in electromagnetic propagation tools
US08/212,012 1994-03-14
US08/214,343 1994-03-14
US08/212,257 1994-03-14
US08/214,916 1994-03-14
PCT/US1995/002814 WO1995024663A1 (en) 1994-03-11 1995-03-07 A borehole measurement system employing electromagnetic wave propagation

Publications (2)

Publication Number Publication Date
CA2185029A1 true CA2185029A1 (en) 1995-09-14
CA2185029C CA2185029C (en) 2003-08-26

Family

ID=27559043

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002185029A Expired - Lifetime CA2185029C (en) 1994-03-11 1995-03-07 A borehole measurement system employing electromagnetic wave propagation

Country Status (3)

Country Link
AU (1) AU1981695A (en)
CA (1) CA2185029C (en)
NO (1) NO315099B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110208008A (en) * 2019-06-24 2019-09-06 哈尔滨东安汽车发动机制造有限公司 A kind of manual transmission vehicle shift quality assessment evaluation experimental devices and methods therefor

Also Published As

Publication number Publication date
NO963793L (en) 1996-11-08
CA2185029C (en) 2003-08-26
NO963793D0 (en) 1996-09-10
AU1981695A (en) 1995-09-25
NO315099B1 (en) 2003-07-07

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Legal Events

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EEER Examination request
MKEX Expiry

Effective date: 20150309