GB2363460A - Method and apparatus for cancellation of unwanted signals in MWD acoustic tools - Google Patents

Method and apparatus for cancellation of unwanted signals in MWD acoustic tools

Info

Publication number
GB2363460A
GB2363460A GB0122996A GB0122996A GB2363460A GB 2363460 A GB2363460 A GB 2363460A GB 0122996 A GB0122996 A GB 0122996A GB 0122996 A GB0122996 A GB 0122996A GB 2363460 A GB2363460 A GB 2363460A
Authority
GB
United Kingdom
Prior art keywords
borehole
noise
receiver
sensor
signals
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
GB0122996A
Other versions
GB2363460B (en
GB0122996D0 (en
Inventor
Paul F Rodney
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.)
Dresser Industries Inc
Original Assignee
Dresser Industries Inc
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 Dresser Industries Inc filed Critical Dresser Industries Inc
Priority claimed from PCT/US1999/006308 external-priority patent/WO2000057209A1/en
Publication of GB0122996D0 publication Critical patent/GB0122996D0/en
Publication of GB2363460A publication Critical patent/GB2363460A/en
Application granted granted Critical
Publication of GB2363460B publication Critical patent/GB2363460B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
    • G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
    • G01V1/364—Seismic filtering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V2210/00—Details of seismic processing or analysis
    • G01V2210/30—Noise handling
    • G01V2210/32—Noise reduction

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

An apparatus (10) and method are disclosed for eliminating a noise signal from at least one source during an acoustic measurement of a subsurface geological formation or borehole. The apparatus (10) includes a longitudinal body for positioning in the borehole and a transmitter (22) supported by the body for transmitting acoustic signals into the formation and borehole. A sensor (23), substantially isolated within the body, is used to detect one or more noise signals and a receiver (24) is carried by the body for receiving acoustic signals traversing the formation and borehole, and for receiving one or more noise signals. A processor (26) is connected to the sensor (23) and receiver (24) for processing the acoustic signals and noise signals coupled from the receiver (24) and the noise signal coupled from the sensor (23) into a preferred formation or borehole signal by determining the noise signal received at the receiver (24) using the noise signal received in the sensor (23) and a propagation factor for the noise signal between the sensor (23) and receiver (24). The determined noise signal is used to identify and eliminate the noise signals from the acoustic signals traversing the formation and borehole.
GB0122996A 1999-03-22 1999-03-22 Method and apparatus for cancellation of unwanted signals in MWD acoustic tools Expired - Lifetime GB2363460B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1999/006308 WO2000057209A1 (en) 1997-10-20 1999-03-22 Method and apparatus for cancellation of unwanted signals in mwd acoustic tools

Publications (3)

Publication Number Publication Date
GB0122996D0 GB0122996D0 (en) 2001-11-14
GB2363460A true GB2363460A (en) 2001-12-19
GB2363460B GB2363460B (en) 2003-02-19

Family

ID=22272421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0122996A Expired - Lifetime GB2363460B (en) 1999-03-22 1999-03-22 Method and apparatus for cancellation of unwanted signals in MWD acoustic tools

Country Status (2)

Country Link
GB (1) GB2363460B (en)
NO (1) NO20014577L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117171627B (en) * 2023-10-24 2024-01-26 四川恒远信友环境科技有限公司 Power equipment noise source point identification method and system based on imaging technology

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5343001A (en) * 1992-10-13 1994-08-30 Shell Oil Company Acoustic multi-mode logging device adapted to decouple noise within a semi-rigid receiver array

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5343001A (en) * 1992-10-13 1994-08-30 Shell Oil Company Acoustic multi-mode logging device adapted to decouple noise within a semi-rigid receiver array

Also Published As

Publication number Publication date
NO20014577L (en) 2001-11-22
GB2363460B (en) 2003-02-19
GB0122996D0 (en) 2001-11-14
NO20014577D0 (en) 2001-09-20

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20190321