LWI vessel en route to Oyo field offshore Nigeria

The Island Constructor light well intervention (LWI) vessel is en route to Oyo field offshore Nigeria for service on the Oyo-8 well’s subsurface controlled subsurface safety valve (SCSSV), Erin Energy Corp. reported.

The SCSSV—a safety device installed in the upper wellbore to shut producing conduits in the event of an emergency—failed to open after a planned production curtailment. Several unsuccessful attempts were made to open the valve by normal methods prior to enlisting light well intervention services.

The vessel departed Skalevic, Norway, on Mar. 28 and is expected to arrive in mid-April at Oyo field, where it will immediately commence work on Oyo-8.

The company expects the intervention to take a few days to complete and to subsequently reestablish production from the well. Intervention and reopening of the SCSSV is anticipated in April.

Erin Energy started oil production from the Oyo-8 and Oyo-7 wells in May and June 2015, respectively (OGJ Online, June 18, 2015). Total output from the two wells in 2015 was 1.6 million bbl of oil.

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