Passive Magnetic Ranging

Passive magnetic ranging is achieved by analyzing three component MWD gravity and magnetic data over a range of measured depths to estimate the location and orientation of the target relative to the drilling assembly.

  • Access to second well not required
  • Passive magnetic ranging analysis can be done 100 percent remotely
  • No special downhole tools required
  • Lower cost of implementation
  • Relative positioning measurements optimize trajectory control and mitigate uncertainty from compounding MWD error
  • Measurement not effected by resistivity and homogeneity of the surrounding rock formations

Passive magnetic ranging requires no access to the target well and can be applied to:

  • Anti-collision
  • Parallel and twinning applications
  • Well intersections
  • Re-entries
  • Steering around a fish
  • Extending the distances between active magnetic ranging runs
  • Ranging in applications not feasible for other active ranging technologies

Magnetic Ranging

Passive Magnetic Ranging

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Summary France: Innovative Magnetic Ranging Solution Saves Over USD 200,000 on Complex P&A Project Feb 2018
Summary United States: Sperry Drilling Passive Ranging Leads to Successful Re-Entry and Helps Salvage an 18,000 Foot (5,486 Meter) Well Jan 2015
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