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GB1435788A - Apapratus and method for sesmic exploration in a marine environment - Google Patents

Apapratus and method for sesmic exploration in a marine environment

Info

Publication number
GB1435788A
GB1435788A GB4892173A GB4892173A GB1435788A GB 1435788 A GB1435788 A GB 1435788A GB 4892173 A GB4892173 A GB 4892173A GB 4892173 A GB4892173 A GB 4892173A GB 1435788 A GB1435788 A GB 1435788A
Authority
GB
United Kingdom
Prior art keywords
guns
bubble
seismic
air
sources
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.)
Expired
Application number
GB4892173A
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.)
GEORSOURCE Inc
Original Assignee
GEORSOURCE 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 GEORSOURCE Inc filed Critical GEORSOURCE Inc
Priority to GB4892173A priority Critical patent/GB1435788A/en
Publication of GB1435788A publication Critical patent/GB1435788A/en
Expired 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
    • G01V1/003—Seismic data acquisition in general, e.g. survey design
    • G01V1/006—Seismic data acquisition in general, e.g. survey design generating single signals by using more than one generator, e.g. beam steering or focusing arrays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
    • G01V1/387—Reducing secondary bubble pulse, i.e. reducing the detected signals resulting from the generation and release of gas bubbles after the primary explosion

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (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)
  • Oceanography (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

1435788 Seismic energy generators GEOSOURCE Inc 19 Oct 1973 48921/73 Heading H4D A method for generating an underwater seismic pulse having a signature with a primaryto-secondary pulse pressure ratio of at least eight-to-one comprises spacing a plurality of bubble-generating seismic energy sources of different sizes apart sufficiently to prevent coalescence of their initially expanding bubbles of correspondingly different maximum diameters, actuating the sources simultaneously, and suppressing secondary oscillations of the bubble of at least one source. In one embodiment, seven air guns of different chamber volumes and mutually spaced at various intervals are supported by floats and towed by a ship. Each gun has two compressedair chambers connected by an orifice, one chamber serving to inject oscillation-suppressing air into the bubble generated by abrupt release of air from the other chamber. Delays been a firing control signal for the guns and their actual firing times are compensated for by electronic means, the delays for individual guns being measured with the aid of respective hydrophones placed near the guns. The guns may be replaced with explosive or other seismic sources. Bubble oscillation may be suppressed by other gas-injection techniques or by using a perforated enclosure for the seismic source.
GB4892173A 1973-10-19 1973-10-19 Apapratus and method for sesmic exploration in a marine environment Expired GB1435788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4892173A GB1435788A (en) 1973-10-19 1973-10-19 Apapratus and method for sesmic exploration in a marine environment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4892173A GB1435788A (en) 1973-10-19 1973-10-19 Apapratus and method for sesmic exploration in a marine environment

Publications (1)

Publication Number Publication Date
GB1435788A true GB1435788A (en) 1976-05-12

Family

ID=10450451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4892173A Expired GB1435788A (en) 1973-10-19 1973-10-19 Apapratus and method for sesmic exploration in a marine environment

Country Status (1)

Country Link
GB (1) GB1435788A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0031196B1 (en) * 1979-10-25 1984-07-25 Horizon Exploration Limited Underwater seismic source and its use
EP0115359A1 (en) * 1983-01-19 1984-08-08 Shell Internationale Researchmaatschappij B.V. A method and a system for signal improvement in marine seismic exploration
GB2183834A (en) * 1985-12-02 1987-06-10 Decca Ltd Underwater seismic sources and method of operation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0031196B1 (en) * 1979-10-25 1984-07-25 Horizon Exploration Limited Underwater seismic source and its use
EP0115359A1 (en) * 1983-01-19 1984-08-08 Shell Internationale Researchmaatschappij B.V. A method and a system for signal improvement in marine seismic exploration
US4727956A (en) * 1983-01-19 1988-03-01 Shell Oil Company Method and apparatus for signal improvement in marine seismic exploration
GB2183834A (en) * 1985-12-02 1987-06-10 Decca Ltd Underwater seismic sources and method of operation

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee