CA2424715A1 - Multipole acoustic logging with azimuthal spatial transform filtering - Google Patents

Multipole acoustic logging with azimuthal spatial transform filtering Download PDF

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Publication number
CA2424715A1
CA2424715A1 CA002424715A CA2424715A CA2424715A1 CA 2424715 A1 CA2424715 A1 CA 2424715A1 CA 002424715 A CA002424715 A CA 002424715A CA 2424715 A CA2424715 A CA 2424715A CA 2424715 A1 CA2424715 A1 CA 2424715A1
Authority
CA
Canada
Prior art keywords
azimuthal
borehole
receiver
filtering
array
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
CA002424715A
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French (fr)
Other versions
CA2424715C (en
Inventor
Wallace R. A. George
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.)
Schlumberger Canada Ltd
Original Assignee
Schlumberger Canada Limited
Wallace R. A. George
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 Schlumberger Canada Limited, Wallace R. A. George filed Critical Schlumberger Canada Limited
Publication of CA2424715A1 publication Critical patent/CA2424715A1/en
Application granted granted Critical
Publication of CA2424715C publication Critical patent/CA2424715C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
    • G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well

Abstract

A method and apparatus are provided for detecting a received acoustic pulse of a selected azimuthal borehole mode in a liquid-containing borehole in a formation. The method uses a sonde having an axial array of acoustic receiver stations aligned with the borehole, each receiver station having an azimuthal array of at least four piezoelectric receiver elements, the receiver elements uniformly spaced apart around the azimuthal array. An acoustic pulse transmitted within the borehole produces an electrical signal at each receiver element. Azimuthal spatial transform filtering is applied to produce data representing a received acoustic pulse of the selected azimuthal borehole mode. In one embodiment, azimuthal spatial DFT filtering is applied to digital data produced by analog to digital conversion. In another embodiment, cosine transform filtering is applied by an apodised receiver element.
CA002424715A 2000-09-06 2001-08-28 Multipole acoustic logging with azimuthal spatial transform filtering Expired - Fee Related CA2424715C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/656,143 2000-09-06
US09/656,143 US6568486B1 (en) 2000-09-06 2000-09-06 Multipole acoustic logging with azimuthal spatial transform filtering
PCT/US2001/026767 WO2002021160A2 (en) 2000-09-06 2001-08-28 Multipole acoustic logging with azimuthal spatial transform filtering

Publications (2)

Publication Number Publication Date
CA2424715A1 true CA2424715A1 (en) 2002-03-14
CA2424715C CA2424715C (en) 2008-11-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA002424715A Expired - Fee Related CA2424715C (en) 2000-09-06 2001-08-28 Multipole acoustic logging with azimuthal spatial transform filtering

Country Status (5)

Country Link
US (1) US6568486B1 (en)
AU (1) AU2001285322A1 (en)
CA (1) CA2424715C (en)
DZ (1) DZ3472A1 (en)
WO (1) WO2002021160A2 (en)

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US8117907B2 (en) * 2008-12-19 2012-02-21 Pathfinder Energy Services, Inc. Caliper logging using circumferentially spaced and/or angled transducer elements
US8634272B2 (en) * 2009-04-21 2014-01-21 Baker Hughes Incorporated Televiewer image wood-grain reduction techniques
US8559272B2 (en) * 2010-05-20 2013-10-15 Schlumberger Technology Corporation Acoustic logging while drilling tool having raised transducers
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Also Published As

Publication number Publication date
CA2424715C (en) 2008-11-04
WO2002021160A2 (en) 2002-03-14
US6568486B1 (en) 2003-05-27
AU2001285322A1 (en) 2002-03-22
DZ3472A1 (en) 2002-03-14
WO2002021160A3 (en) 2002-05-30

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Effective date: 20180828