Overview

Challenges
  • Isolate sand-producing zone, perforate new zone
  • Restore production from shut-in well
  • Clean a mile of sand from large, horizontal completion
  • Avoid use of kill-weight fluid and associated formation damage
Results
  • Perforated all intervals in one run
  • Saved 95 hours of operational time
  • Eliminated 16 wireline tractor trips
Case study details

An operator working in the Caspian Sea experienced a sudden influx of sand when its expandable screens failed in the openhole section of a well. After briefly choking back the well to sand-free production levels, the sand broke through again, killing production entirely. The well was then shut in for two years until intervention could take place. It was determined that the original producing zone—which was the main source of sand—should be isolated with a series of plugs, and a new zone should be perforated higher in the completion.

This operation was expected to be lengthy and would require multiple wireline and tractor runs as well as switching between a conventional coiled tubing (CT) unit and a wireline unit. Baker Hughes recommended using the TeleCoilTM intelligent CT perforating service. The TeleCoil service incorporates the benefits of conventional CT with those of electric wireline, providing a robust deployment method, a continuous downhole electrical feed, and seamless transition between standard CT and wireline BHAs.

Download the PDF to read the full case study.

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