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http://www.fortmcmurraytoday.com ... -and-pipeline-spill
+ G1 x0 J% n7 w5 J, r) S" @3 _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.: N; b P4 A: {
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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.+ _& ~4 Z# L* x) \/ E8 M: O
9 `, }0 n2 @ Q/ T0 h) 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 F) W% V, ~' [1 Q) l
Z. k! o( U; K! U( zAn internal investigation found the explosion was a result of work being performed that was "outside of the scope of approved work activities.") B1 r6 o$ z+ `" p2 K( H# c9 l7 h* Q
; m3 q& k* s; c0 IThe 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. , z* |3 A0 c+ K6 ]: F# v8 ^* v4 n- E
/ K" Q- C/ t& ~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. 0 ~' E! B5 |1 m1 F- f2 @. P( W
5 T$ n6 S3 C ^9 E2 [/ c% }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.; m$ Y. h+ r0 P: G; V
/ g3 J% ?) b6 _, c, KNexen 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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_6 X3 d, o. D, i& ZThis 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. ' u/ z5 M2 R9 P* O; C2 O
+ ^7 n# I% p9 X x9 W; }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. . H. w0 n9 c$ b$ f4 Q' F1 Q! \
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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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