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http://www.fortmcmurraytoday.com ... -and-pipeline-spill
0 l6 a9 D* o; [$ L' _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.
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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.
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4 [5 r5 w$ ~7 ^$ G# j& kThe 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.
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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.": j6 W/ _ K0 Y( w4 Q1 L
3 ]. v" Y( u$ ]/ d$ Y3 rThe 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. ) S4 c% [& v8 K$ d& ~7 w
: Z: H3 R6 n4 _: {, [- |+ A! rThe 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. ) \7 A$ y; ?; b' s5 M+ P% I1 S% T
' l/ ^8 B4 j3 ?1 qThe 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.0 e# i& r5 r/ B: [: N& h/ A
/ D: a( Y7 Y* J6 H4 \# _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."2 j4 P. _" E, Y6 ^; M6 @
7 H2 p: N$ X/ O+ W, JThis 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.
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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. * V8 A* J" I: V9 Y- u$ U
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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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