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http://www.fortmcmurraytoday.com ... -and-pipeline-spill
& t% m, m3 t6 m2 f0 d9 ^Nexen Energy will lay off about 350 workers from its Long Lake facility, following its release of results of internal investigations into a July 2015 pipeline spill and the January 2016 hydrocracker explosion.+ G) z& _( m7 a+ H' A% X
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The CNOOC-owned energy company will only be continuing its steam-assisted gravity drainage (SAGD) operations at Long Lake, after it determined a short-term repair was not possible for the hydrocracker unit, which killed two employees when it exploded on Jan. 15, 2016.3 ?' A: J R- D# [" h) z/ u
5 u% {3 } J5 c3 gThe facility's upgrader has been idling since then, and will be moved into winter preservation, with no estimation of when it will be brought back into service.! q8 M" [) T- ^
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An internal investigation found the explosion was a result of work being performed that was "outside of the scope of approved work activities."& d6 {; n6 B* ^+ R
8 l5 @3 g& |8 G- J- y: P2 TThe two employees killed, both Fort McMurray residents, were 52-year-old Drew Foster and 30-year-old Dave Williams. Foster was killed in the explosion. Williams, who was flown to the University of Alberta Hospital's burn unit hours after the explosion, died a week later.
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5 f6 i0 T% I `/ p! b3 {' ^; uIn its announcement Nexen said it is addressing safety gaps in part with refresher training on workplace hazard identification, increased site supervision and safety inspections. 7 E; d& K+ R' y$ f" h, A
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The decision to move to a SAGD-only operation was described as "entirely economic," and will result in about 350 staff layoffs, most of which will be completed by the end of 2016. / F) L- t/ M1 y+ J
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The results of the investigations were given at a news conference on Tuesday by Nexen CEO Fang Zhi and Senior Vice President of Canadian Operation Ron Bailey.6 @3 M: @4 W @; m: O" `' L
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Nexen also said it found the root cause of a July 2015 emulsion spill at Long Lake to be a "thermally-driven upheaval buckling of the pipeline, and the subsequent cooldown during the turnaround."5 z1 H7 `+ T$ d" E
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This was caused because of pipeline design incompatible with the muskeg ground conditions, and steps that could have been taken to mitigate the potential for buckling were not addressed.
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The spill poured up to five million litres of emulsion - a mixture of water, bitumen and sand - into surrounding muskeg. The spill may have been ongoing for up to two weeks when it was discovered in July 2015 by a contractor walking through the area. $ i L6 { ~3 T+ X- t
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In August the Alberta Energy Regulator ordered Nexen to shut down 95 pipelines until the company could prove the pipelines could be operated responsibly. The suspension was lifted in September 2015.
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! g' Z% R$ F% b. ?' i3 n! I, o4 d# z- with files from Vincent McDermott |
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发表于 2016-7-12 18:01
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