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http://www.fortmcmurraytoday.com ... -and-pipeline-spill
, T6 B: T1 k' }0 o& DNexen 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.2 x( T8 i/ ^- m6 H
3 N7 T3 g' }1 ^( s/ {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 {( _; L% J! u$ o k" e8 U
, z, V3 N+ c, b2 m' T( uThe 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.5 W6 B# ^$ g* n5 [$ L
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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."
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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. : V0 G9 b) u3 i9 ?8 R" h
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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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- e/ C+ n$ j' U3 a8 k6 CThe 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 I& ^& {5 N2 K- o
- g! f( W5 T) a1 n7 }7 Q p1 SThe 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.2 V, N1 `: C8 u Q% x2 p
: V3 f3 {; l, X# a/ ]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."
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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. ' z) S! Z( @* n" ~( _" {* H* R$ _, k6 u
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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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9 F7 J: R0 n1 K+ g4 p. `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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- with files from Vincent McDermott |
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发表于 2016-7-12 18:01
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