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http://www.fortmcmurraytoday.com ... -and-pipeline-spill
( [& V, [# ^/ ?9 ?( s MNexen 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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, m7 g' w" _3 P) G2 T `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.& o( a y1 y% T+ C5 O7 {% b
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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.6 v( N. M; q! s2 N& B$ 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."- a- }0 l! ~4 E6 e
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The 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. % u, J/ }4 Q: V4 ^
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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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; }! {' t3 Y6 A$ W [+ q3 N4 \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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3 \$ i+ u, [1 Z0 F( M% b6 n" z7 }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.; |7 }4 W5 h9 b* \3 O
$ K- ?! E. j. N6 ?0 ANexen 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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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. ' s) h `/ m: k, G/ T& s5 i, g( l$ ~
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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. N- V; S# M& H- Z" Y
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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. $ g0 S$ Y# X! ^2 L5 i/ J
, O/ u9 j2 Z: Z, w- with files from Vincent McDermott |
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发表于 2016-7-12 18:01
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