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http://www.fortmcmurraytoday.com ... -and-pipeline-spill
* V4 V* \7 P `0 c4 }/ r) ONexen 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./ s& T1 A& X1 L' t) ?) Z m) O
e5 G2 A# c; E# e4 Y. m' l0 TThe 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.( h5 S2 T2 B/ t( `% ~) K
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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.") I+ p, W- h/ N5 m+ S
. {+ u! {2 o' i O0 n5 L0 z2 V! I- h7 xThe 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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f& z& }$ `+ Y2 F1 u4 pIn 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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9 I7 ]/ h5 E5 @, r! |+ lThe 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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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.! K. y4 a: v& j" `! M' O
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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."2 { c8 b( T( 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. ' z4 ?# y/ c3 I- s- s
/ O" \# {- f: U; ^% z0 MThe 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. 1 e0 h' u( K- I, ^. L
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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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" V4 _. n. }3 A- f1 C& s, v- with files from Vincent McDermott |
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发表于 2016-7-12 18:01
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