GB2371864A - Determination of the fast and slow wave polarisation directions - Google Patents

Determination of the fast and slow wave polarisation directions Download PDF

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Publication number
GB2371864A
GB2371864A GB0211069A GB0211069A GB2371864A GB 2371864 A GB2371864 A GB 2371864A GB 0211069 A GB0211069 A GB 0211069A GB 0211069 A GB0211069 A GB 0211069A GB 2371864 A GB2371864 A GB 2371864A
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GB
United Kingdom
Prior art keywords
coordinate system
fast
determination
recording
slow 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
GB0211069A
Other versions
GB0211069D0 (en
GB2371864B (en
Inventor
Richard Bale
Alina Gabriela Dumitru
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.)
Westerngeco Ltd
Original Assignee
Geco Prakla UK Ltd
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 Geco Prakla UK Ltd filed Critical Geco Prakla UK Ltd
Publication of GB0211069D0 publication Critical patent/GB0211069D0/en
Publication of GB2371864A publication Critical patent/GB2371864A/en
Application granted granted Critical
Publication of GB2371864B publication Critical patent/GB2371864B/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
    • G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
    • G01V1/284—Application of the shear wave component and/or several components of the seismic signal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V2210/00—Details of seismic processing or analysis
    • G01V2210/60—Analysis
    • G01V2210/62—Physical property of subsurface
    • G01V2210/626—Physical property of subsurface with anisotropy

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Acoustics & Sound (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)

Abstract

A method of determining the polarisation directions of the fast and slow shear waves arising from shear wave splitting due to anisotropy, said directions defining a natural coordinate system, the method comprising the steps of: a) recording at least two components of each shear wave, in a recording coordinate system, b) calculating the value of r , being the angle of rotation between the natural coordinate system and the recording coordinate system, for which the L<SB>p</SB> norm of the rotated traces is minimised if p is less than 2, or maximised if p is greater than 2.

Description

2,UK Patent Application 'g,GB,,2 371 864 HA (43) Date of Printing by UK
Office 07.08.2002 (21) Application No 0211069.0 (51) INTCL7 G01V 1/28
(22) Date of Filing 20.10.200:0 (52) UK CL (Edition T) (30) Priority Data GIG GEL G3P G6H (31t 9926929 (32) 16.11.1999 (33) GB (56) Documents Cited by ISA (86) International Application Data EP 0518308 A US 5835452 A PCT/GB20001004037 En 20.10.2000 US 5657294 A US 4888743 A US 4817061 A US 4803666 A
(87) International Publication Data Geophysics, Vol 50 No 12, December 1985, pages WO2001/03es99 En 25.05.2001 2862-2888 (58) Field of Search by ISA
(71) Applicant(s) INTCL7 G01V Geco-Prakla IUK) Limited EPO-lntemal, INSPEC, COMPENDEX, WPI Data llncorPorated In the United Kingdom) Schlumberger House, Buckingham Gate, GATWICK, West Sussex, RHO ONZ, United Kingdom (74) Agent and/or Address for Service Marks & Clerk (72) Inventor(s) 4220 Nash Court, Oxford Business Park South, Richard Bale OXFORD, OX4 2RU, United Kingdom Alina Gabriela Dumitru (54) Abstract Title Determination of the fast and slow wave polarization directions (57) A method of determining the polarization directions of the fast and slow shear waves arising from shear wave splitting due to anisotropy, said directions defining a natural coordinate system, the method comprising the steps of: a) recording at least two components of each shear wave, in a recording coordinate system, b) calculating the value of 8, being the angle of rotation between the natural coordinate system and the recording coordinate system, for which the Lp norm of the rotated traces is minimised if p is less than 2 or maximised if p is greater than 2 C) W D
GB0211069A 1999-11-16 2000-10-20 Determination of the fast and slow shear wave polarisation directions Expired - Fee Related GB2371864B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9926929A GB2356455A (en) 1999-11-16 1999-11-16 Determination of fast and slow shear wave polarisation directions
PCT/GB2000/004037 WO2001036999A2 (en) 1999-11-16 2000-10-20 Determination of the fast and slow shear wave polarisation directions

Publications (3)

Publication Number Publication Date
GB0211069D0 GB0211069D0 (en) 2002-06-26
GB2371864A true GB2371864A (en) 2002-08-07
GB2371864B GB2371864B (en) 2003-07-02

Family

ID=10864501

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9926929A Withdrawn GB2356455A (en) 1999-11-16 1999-11-16 Determination of fast and slow shear wave polarisation directions
GB0211069A Expired - Fee Related GB2371864B (en) 1999-11-16 2000-10-20 Determination of the fast and slow shear wave polarisation directions

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9926929A Withdrawn GB2356455A (en) 1999-11-16 1999-11-16 Determination of fast and slow shear wave polarisation directions

Country Status (4)

Country Link
AU (1) AU1152101A (en)
GB (2) GB2356455A (en)
NO (1) NO20022378D0 (en)
WO (1) WO2001036999A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1014075C2 (en) * 2000-01-13 2001-07-16 Koninkl Kpn Nv Method and device for determining the quality of a signal.
GB2379505B (en) * 2001-09-08 2004-10-27 Westerngeco Ltd A method of, and an apparatus for, processing seismic data
AU2003203024B2 (en) * 2002-01-15 2005-11-03 Westerngeco, L.L.C. Layer stripping converted reflected waveforms for dipping fractures
GB2384557B (en) * 2002-01-25 2005-06-29 Westerngeco Ltd A method of and apparatus for processing seismic data
CN116908909B (en) * 2023-07-07 2023-12-12 成都理工大学 Fast and slow transverse wave separation method based on three-parameter scanning

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4803666A (en) * 1984-07-20 1989-02-07 Standard Oil Company (Indiana), Now Amoco Corp. Multisource multireceiver method and system for geophysical exploration
US4817061A (en) * 1984-07-20 1989-03-28 Amoco Corporation Seismic surveying technique for the detection of azimuthal variations in the earth's subsurface
US4888743A (en) * 1986-10-30 1989-12-19 Amoco Corporation Method of seismic surveying for resolving the effects of formation anisotropy in shear wave reflection seismic data
EP0518308A1 (en) * 1991-06-13 1992-12-16 CHEVRON U.S.A. Inc. Method of geophysical exploration by analyzing shear-wave polarization directions
US5657294A (en) * 1995-09-25 1997-08-12 Amoco Corporation Short window norm optimization for multi-source multi-component seismic data
US5835452A (en) * 1995-10-06 1998-11-10 Amoco Corporation Reflected shear wave seismic processes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060203A (en) * 1990-06-26 1991-10-22 Chevron Research And Technology Company Method of layer stripping to predict subsurface stress regimes
US5060204A (en) * 1990-06-27 1991-10-22 Chevron Research And Technology Company Method of layer stripping to determine fault plane stress build-up

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4803666A (en) * 1984-07-20 1989-02-07 Standard Oil Company (Indiana), Now Amoco Corp. Multisource multireceiver method and system for geophysical exploration
US4817061A (en) * 1984-07-20 1989-03-28 Amoco Corporation Seismic surveying technique for the detection of azimuthal variations in the earth's subsurface
US4888743A (en) * 1986-10-30 1989-12-19 Amoco Corporation Method of seismic surveying for resolving the effects of formation anisotropy in shear wave reflection seismic data
EP0518308A1 (en) * 1991-06-13 1992-12-16 CHEVRON U.S.A. Inc. Method of geophysical exploration by analyzing shear-wave polarization directions
US5657294A (en) * 1995-09-25 1997-08-12 Amoco Corporation Short window norm optimization for multi-source multi-component seismic data
US5835452A (en) * 1995-10-06 1998-11-10 Amoco Corporation Reflected shear wave seismic processes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Geophysics, Vol 50 No 12, December 1985, pages 2862-2888 *

Also Published As

Publication number Publication date
GB2356455A (en) 2001-05-23
GB9926929D0 (en) 2000-01-12
NO20022378D0 (en) 2002-05-16
WO2001036999A3 (en) 2001-11-01
GB0211069D0 (en) 2002-06-26
AU1152101A (en) 2001-05-30
WO2001036999A2 (en) 2001-05-25
GB2371864B (en) 2003-07-02

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Legal Events

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732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20111020