CA2256771A1 - Electrical logging of a laminated earth formation - Google Patents

Electrical logging of a laminated earth formation

Info

Publication number
CA2256771A1
CA2256771A1 CA002256771A CA2256771A CA2256771A1 CA 2256771 A1 CA2256771 A1 CA 2256771A1 CA 002256771 A CA002256771 A CA 002256771A CA 2256771 A CA2256771 A CA 2256771A CA 2256771 A1 CA2256771 A1 CA 2256771A1
Authority
CA
Canada
Prior art keywords
magnetic field
earth formation
wellbore
formation
earth
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
CA002256771A
Other languages
French (fr)
Other versions
CA2256771C (en
Inventor
David R. Beard
Kurt-Martin Strack
Leonty Abraham Tabarovsky
Melis Van Der Horst
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.)
Shell Canada Ltd
Original Assignee
David R. Beard
Kurt-Martin Strack
Leonty Abraham Tabarovsky
Melis Van Der Horst
Shell Canada Limited
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
Application filed by David R. Beard, Kurt-Martin Strack, Leonty Abraham Tabarovsky, Melis Van Der Horst, Shell Canada Limited filed Critical David R. Beard
Publication of CA2256771A1 publication Critical patent/CA2256771A1/en
Application granted granted Critical
Publication of CA2256771C publication Critical patent/CA2256771C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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

A method of determining an electric conductivity of an earth formation formed of different earth layers (3, 5, 7) which earth formation is penetrated by a wellbore (1) containing a wellbore fluid, is provided. The method comprises lowering an induction logging tool (9) into the wellbore (1) to a location surrounding by a selected one of the earth layers (3, 5, 7), the tool (9) comprising magnetic field transmitter means (18) for inducing magnetic fields of different frequencies in said earth formation, and magnetic field receiver means (19) for receiving response magnetic fields and for providing a signal representative of each response magnetic field, at least one of the transmitter means (18) and the receiver means (19) having a plurality of magnetic dipole moments (26, 28) in mutually orthogonal directions. At least two of said different frequencies are selected, and for each selected frequency, the transmitter means (18) is operated so as to induce a magnetic field in the earth formation and the receive means (19) is operated so as to provide a signal representing a response magnetic field, wherein said at least one of the transmitter (18) and receiver means (19) is operated in said mutually orthogonal directions. The signals are combined in a manner so as to create a combined signal having a reduced dependency on the electric conductivity in the wellbore region. The formation resistivity and the relative orientation of the logging tool with respect to the formation layering is determined from the combined signal.
CA002256771A 1996-07-01 1997-06-30 Electrical logging of a laminated earth formation Expired - Fee Related CA2256771C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US2096496P 1996-07-01 1996-07-01
US60/020964 1996-07-01
PCT/EP1997/003490 WO1998000733A1 (en) 1996-07-01 1997-06-30 Electrical logging of a laminated earth formation

Publications (2)

Publication Number Publication Date
CA2256771A1 true CA2256771A1 (en) 1998-01-08
CA2256771C CA2256771C (en) 2005-04-26

Family

ID=21801566

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002256771A Expired - Fee Related CA2256771C (en) 1996-07-01 1997-06-30 Electrical logging of a laminated earth formation

Country Status (13)

Country Link
US (1) US6147496A (en)
EP (1) EP0909398B1 (en)
JP (1) JP3717080B2 (en)
CN (1) CN1137393C (en)
AU (1) AU707977B2 (en)
BR (1) BR9710024B1 (en)
CA (1) CA2256771C (en)
DE (1) DE69715411T2 (en)
EA (1) EA001862B1 (en)
NO (1) NO321611B1 (en)
NZ (1) NZ333980A (en)
OA (1) OA11019A (en)
WO (1) WO1998000733A1 (en)

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Also Published As

Publication number Publication date
AU3442197A (en) 1998-01-21
US6147496A (en) 2000-11-14
NO321611B1 (en) 2006-06-12
JP3717080B2 (en) 2005-11-16
EP0909398B1 (en) 2002-09-11
EA001862B1 (en) 2001-10-22
DE69715411T2 (en) 2003-06-05
EP0909398A1 (en) 1999-04-21
CA2256771C (en) 2005-04-26
WO1998000733A1 (en) 1998-01-08
JP2000514181A (en) 2000-10-24
BR9710024A (en) 1999-08-10
NZ333980A (en) 2000-03-27
OA11019A (en) 2003-03-10
NO986210D0 (en) 1998-12-30
AU707977B2 (en) 1999-07-22
DE69715411D1 (en) 2002-10-17
EA199900071A1 (en) 1999-06-24
NO986210L (en) 1999-01-28
CN1137393C (en) 2004-02-04
BR9710024B1 (en) 2009-05-05
CN1222978A (en) 1999-07-14

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