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http://www.fortmcmurraytoday.com ... -and-pipeline-spill
+ N4 ?4 s0 y# J! m! iNexen 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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b; L& A" F- c, K4 y1 C* [4 w) L0 ]4 IThe 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.& P- d0 \, u/ P( |# c* I
8 W3 k- z' y2 e7 t& e f( XThe 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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0 I& ]% K: C3 I+ M5 Z9 K1 mAn 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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5 l, j. H1 q3 L& S5 V1 I' nThe 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. 9 h L. d, @; u2 H5 ]
5 b1 @1 b5 k2 F; c" o* YIn its announcement Nexen said it is addressing safety gaps in part with refresher training on workplace hazard identification, increased site supervision and safety inspections. , _: n( o6 I0 [1 a8 N" \
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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: K% |, X9 y1 C" }3 WThe 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.) a' a0 }1 C2 p- b
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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."5 d& `7 z6 C+ l2 q
/ _" ]& f2 n, y( Q. U) z+ sThis 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. ) P9 Z! D) j' ]/ 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. 6 N. P u# x3 i+ H$ d+ ]5 r
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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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w8 x3 u# z }; V8 L* D+ k- with files from Vincent McDermott |
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发表于 2016-7-12 18:01
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