Schlumberger

Case Study: Operator Saves 53 Hours of Survey Time Using xBolt Service Across 8-Well Pad, MidCon Basin

Efficient multitelemetry service eliminates planned 23-hour trip in one of the wells to switch telemetry tools

Challenge: Lower overall drilling times where receiving traditional electromagnetic (EM) telemetry is made impossible by overlying formations and extended laterals.

Solution: Used both EM and mud pulse telemetry capabilities from the xBolt accelerated drilling service to save survey time while maintaining telemetry reliability.

Result:

  • Saved 53 hours of survey time over 8 wells.
  • Reduced connection time by 7.5 hours per 10,000-ft lateral.
  • Avoided an estimated 23-hour trip.
  • Decrease survey time to improve overall drilling time

    An operator needed to increase drilling efficiency by decreasing survey time using EM telemetry, which would enable sending survey data while making a connection instead of waiting for the mud pumps to turn on after a connection is made. However, the formation layers above the wellbore and extended laterals made it impossible for EM telemetry to be received.

    Use xBolt service’s multitelemetry capability to maintain signal reliability

    To produce and receive reliable telemetry signals faster than traditional mud pulse technology, Schlumberger suggested using the xBolt service. The service’s multitelemetry feature enables operators to switch between EM telemetry and high-speed mud pulse telemetry as needed. In addition, Schlumberger installed a deep electrode receiver in an adjacent well to enable EM signal reception.

    Saved 53 hours of survey time across 8 wells

    By using the xBolt service, the operator was able to avoid making a 23-hour trip that would be required to change the BHA if it had included a conventional single-telemetry tool. The service quickly responded to a downlink and switched to mud pulse telemetry mode, minimizing the time spent troubleshooting for signal quality. Toward the end of the run, the tool was switched back to EM telemetry mode to maximize on-bottom time.

    Over an 8-well pad, the operator saved a total of 53 hours of survey time.

    Operator Saves 53 Hours of Survey Time Using xBolt Service Across 8-Well Pad, MidCon Basin

    Using the xBolt service, the operator was able to avoid a 23-hour trip to switch between EM and mud pulse telemetry tools.


    Download: Operator Saves 53 Hours of Survey Time Using xBolt Service Across 8-Well Pad, MidCon Basin (0.12 MB PDF)

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