Seismic Field Survey and Equipment Quiz
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Questions and Answers

What is the role of the party chief in seismic crew organization?

  • Operating equipment and ensuring data accuracy
  • Supervising office work and interpretation
  • Determining line location and shotpoints
  • Supervising the field crew and office, quality control, data interpretation, final report, and recommendations (correct)

    • What is the role of the observer in seismic crew organization?

  • Operating equipment and ensuring data accuracy (correct)
  • Supervising the field crew and office, quality control, data interpretation, final report, and recommendations
  • Determining line location and shotpoints
  • Supervising office work and interpretation

    • What is the function of geophones in seismic field survey?

  • Detecting/seismometers capable of measuring ground motion (correct)
  • Operating seismic sources
  • Handling the streamer
  • Operating navigation equipment

    • What is the function of hydrophones in seismic field survey?

    <p>Pressure geophones used at sea</p> Signup and view all the answers

    What is the function of OBS in seismic field survey?

    <p>Combines hydrophones and seismometers</p> Signup and view all the answers

    What is the function of streamers in seismic field survey?

    <p>Recording data</p> Signup and view all the answers

    What is the function of seismic cameras in seismic field survey?

    <p>Producing records on photographic film/paper as vertical time lines called wiggly lines</p> Signup and view all the answers

    What are the seismic sources at sea?

    <p>Air gun, aquapulse (gas-gun), and sparker or plasma sound</p> Signup and view all the answers

    The party chief is only responsible for supervising the field crew, not the office work or final report.

    <p>False</p> Signup and view all the answers

    The observer is responsible for determining line location and shotpoints along the lines.

    <p>False</p> Signup and view all the answers

    Seismic sources on land only include explosive dynamite.

    <p>False</p> Signup and view all the answers

    Hydrophones are used as detectors/seismometers to measure ground motion on land.

    <p>False</p> Signup and view all the answers

    Single-channel streamer cable is used for petroleum exploration.

    <p>False</p> Signup and view all the answers

    Seismic cameras are still commonly used for recording ground motion detected by geophones.

    <p>False</p> Signup and view all the answers

    Digital recording systems read the signal from geophones at an interval of one second.

    <p>False</p> Signup and view all the answers

    Recent surveys have streamer length up to 5000 to 6000 m and more than 240 recording segments (channel).

    <p>True</p> Signup and view all the answers

    What is the role of the party chief in a seismic field survey?

    <p>The party chief is responsible for supervising both the field crew and office work, quality control, data interpretation, final report, and recommendations.</p> Signup and view all the answers

    What are some examples of seismic sources used on land?

    <p>Explosive dynamite, non-explosive methods such as sledgehammers, rifles and guns, weight droppers, dinosies, and vibrosies.</p> Signup and view all the answers

    What is the difference between geophones and hydrophones?

    <p>Geophones are used as detectors/seismometers to measure ground motion on land, while hydrophones are pressure geophones used at sea.</p> Signup and view all the answers

    What is an OBS in seismic field surveys?

    <p>OBS (ocean bottom seismometer) is a combination of hydrophones and seismometers.</p> Signup and view all the answers

    What is the purpose of streamer cable in seismic surveys at sea?

    <p>Streamer cable is used to detect sound waves and vibrations in the water, which helps to map the geological structure of the sea floor.</p> Signup and view all the answers

    What is the difference between multiple-channel streamer cable and single-channel streamer cable?

    <p>Multiple-channel streamer cable is used for petroleum exploration, while single-channel streamer is used for engineering survey.</p> Signup and view all the answers

    What is the function of recording equipment in a seismic field survey?

    <p>Recording equipment stores the ground motion detected by geophones, with signals selectively amplified and filtered to remove noise.</p> Signup and view all the answers

    What is the advantage of using digital recording systems in seismic field surveys?

    <p>Digital recording systems allow for more precise and efficient data collection and analysis, with signals recorded as binary digits along a tape width.</p> Signup and view all the answers

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