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903 Well Site Completion and Servicing Safety
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Well Logging

Well logging is the recording of information about subsurface geologic formations, including records kept by the driller and records of mud and cutting analyses, core analysis, drill stem tests, and electric, acoustic, and radioactivity procedures.

The purpose of well logging is to identify formation and other downhole properties of the well bore.

Well logging tools can include radioactive, electric, mechanical, and sonic tools, among others.

Potential Hazards

  • being exposed to radiation
  • getting injured due to an unexpected release of pressure

Possible Solutions

  • Keep non-essential workers away from the rig floor and marked-off areas where radiation hazards may be present.
  • Wear appropriate personal protective equipment (PPE).
  • Allow only authorized and qualified logging company personnel to handle the logging tools.
  • Report any damage to radioactive logging tools.
  • Check for the presence of trapped pressure before opening the tool housing.

Knowledge Check Choose the best answer for the question.

5-3. According to the text, why should the contractor keep non-essential workers away from the rig floor and marked-off areas?