SSSV reactivated from LWI vessel

Key results

• No workover needed
• LWI vessel
• 3.5 hours total treatment time
• 324 bopd regained aggregate oil production for the first 30 days

Challenge

A sub-sea well of a major operator in the Norwegian North Sea had a non-operational Tubing Retrievable Surface Controlled Subsurface Safety Valve (TRSCSV) that would not pass it’s inflow test. Acid and slickline interventions were attempted but were ineffective. If the TRSCSV could not be made operational, the well would be shut-in.

Based on past experience including the consistent performance of the BLUESPARK® service, Blue Spark Energy was mobilized to fix the issue.

• Vertical section of well
• Depth of Treatment: 400 m (1,300 ft)
• Suspected scale: CaCO3

Solution

Remove scale from wellbore equipment to restore functionality using electro-hydraulic pulsing technology.

• A LWI vessel was used for the operation, eliminating the need for a rig.
• The BLUESPARK® tool was run on third-party E-Line to the treatment interval.
• Only one run in the well was required to treat the TRSCSV with a total treatment time of 3.5 hours.
• An inflow test of the TRSCSV was performed.

Outcome

• The TRSCSV was moving properly and was fully closing.
• The inflow test was successful, exceeding the test criteria.
• The operation was completed from an LWI vessel, eliminating the need for a costly rig.
• The well would not need to be shut-in.