NSEA-SR-145 (North Sea)

CHALLENGE

A major operator on the Norwegian Continental Shelf needed to release the annular safety valve (ASV) of a well for later completion string retrieval but were concerned about scale buildup. Normally they would use string shots and brushes to remove scale, or, they would cut the tubing & the ASV.

They elected to try BLUESPARK® pulsing technology to remove the scale instead, as BLUESPARK® can more accurately target specific depths and would save both time and cost.

SOLUTION

Remove scale from the upper completion of the wellbore using electro-hydraulic pulsing technology.

  • The BLUESPARK® tool was run on third-party E-Line to the treatment interval.

  • A 25 m interval was treated across the ASV and below it, thereby exposing the internal “punch tool locator” profile and clearing an area for plug installation.

  • The treatment was completed in one run in less than 14 hours of operating time.

  • A multi-finger caliper (MFC) was run over the treated and untreated sections of the wellbore for comparison to the previous caliper log.

Blue Spark Energy - case study Scale removed from Annular Safety Valve North Sea

CONDITIONS

  • Depth: 525 m (1,720 ft)

  • Temperature: 40 °C (104 °F)

OUTCOME

  • The MFC log confirmed that the scale over the interval treated had been reduced by 80 – 100%.

  • The plug was set below the ASV and the ASV was released with a dedicated punch tool.

  • BLUESPARK® saved up to 5 days of operating time and USD 200K.


Blue Spark Energy is paving the way towards a sustainable, dynamic oil & gas industry. As leaders in high-pulse powered wellbore remediations, we provide a revolutionary technology that is a safe, cost-effective, and efficient solution for forward-thinking energy providers.

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NSEA-SR-146 (North Sea)

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APAC-IW-144 (Asia Pacific)