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http://www.fortmcmurraytoday.com ... -and-pipeline-spill. @8 j2 S/ s7 m2 x: s$ L/ v
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.6 ]# z+ T# E) n; t
9 e4 E! _( K2 b" C% ZThe 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.
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The 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.1 u7 E; A$ s1 w$ c
2 Q+ m" V. r6 p4 o# q% kAn internal investigation found the explosion was a result of work being performed that was "outside of the scope of approved work activities."2 l9 i9 n8 L& H! D. w3 Y
! L6 ~& |( Z% V# P5 A: h! pThe 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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In its announcement Nexen said it is addressing safety gaps in part with refresher training on workplace hazard identification, increased site supervision and safety inspections.
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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.
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( @+ K+ _7 x* X: \$ C4 RThe 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.
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# c9 Z- T3 d- u# r W2 qNexen 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."
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) X; H! n" Q* H/ q# v* aThis 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. " i% Z. K. \& e
- B1 b& T4 K& D2 LThe 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.
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' L( `" Z" T; m% E0 @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. ) a9 w. I3 N6 |: K3 R
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- with files from Vincent McDermott |
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发表于 2016-7-12 18:01
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