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http://www.fortmcmurraytoday.com ... -and-pipeline-spill
: ?* ]+ o; A- |, P4 D$ p4 Z1 W+ L4 NNexen 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.: l; r% I1 T9 w
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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.+ D f4 o1 O0 C! N4 B- m
4 z5 n$ ]- Z! p! lThe 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.( q2 G% \$ ]. g$ K
% _8 H: t* }+ g2 p* d( B1 S2 E+ bAn 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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9 M( W- ^# \3 O$ cThe 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. % Y& A/ ~4 Y$ K T
6 }- ^+ m6 Y$ g9 o. s9 OIn 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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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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1 ? M J9 L- _4 t, [5 ZThe 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.
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/ G! ]( u* K+ f8 D; c5 w% a6 ]* QNexen 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.
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y( A4 t; {! F- z3 p; bThe 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. - A% B4 h" u8 h8 Z1 Z% [: P; n) K
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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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. |. ]/ s* F, c/ m- with files from Vincent McDermott |
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发表于 2016-7-12 18:01
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