1 northern pipelining & practical experience presentation to:apegga april 21, 2005 calgary
TRANSCRIPT
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Northern Pipelining & Practical Experience
Presentation to:
APEGGAAPEGGAApril 21, 2005
Calgary
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Topics
• Enbridge (NW) Pipeline System Overview• “Northern” Pipeline Challenges and
Successes• Maintenance and Monitoring• Inspection and Integrity Management• Reporting• The people that make it possible
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Quick Facts
• Constructed: 1983 – 1985• Diameter: 323.8 mm• Length: 869 km• Design: Limit States• Features:
– 140 defined water crossings
– 2 major rivers
– 150 significant slopes
– ambient temperature pipeline
• Design Pressure: 9930 kPa
Inuvik
Norman Wells
Zama
Ft. Simpson
Wrigley
Enbridge (NW) Pipeline System
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Quick Facts
• Throughput: 30,000 BPD (4,800 m3/d)• One shipper from Norman Wells to KP 839.2
Two shippers from there to KP 869 (Zama)• Three (3) Pump Stations:
– 1 natural gas powered (NW)
– 2 diesel powered (WG & MC)
• Crude Characteristics:– Density = 827 kg/m3
– Pour Point = -50° Celsius
– RVP < = 103 kPag
– Viscosity = 2.0 cSt.
• Remote Operations from Edmonton
Enbridge (NW) Pipeline System
Aerial View of Norman Wells
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“Northern” Pipeline Challenges
Unique “Northern” P/L Issues• Capital Cost• Geography and Remote Access• Permafrost
Enbridge Experience Applied to
Future Development• Proven sub-surface
construction in permafrost• Proven methods of monitoring
pipeline integrity
Inuvik
Norman Wells
Zama
Ft. Simpson
Wrigley
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Norman Wells Successes: Design Innovation
• Operating temperatures
• Limit States Design– lower cost– strain limit
0.5%
• Integrity monitoring
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Norman Wells Successes: Permafrost Challenges Met
• Design• Environmental/ Geotechnical
– Right of Way – trenching
Ice Rich
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Norman Wells Successes: Slopes – Then and Now
• Design• Environmental/
Geotechnical– Right of Way– trenching– slope
stabilization
1984 1997
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Experience:Permafrost
Map and Diagram from Geological Survey of Canada website
Region requiring design consideration for permafrost Conventional pipeline design and construction
Area of sporadic permafrost that requires minimal pipeline
design and construction considerations for permafrost
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Norman Wells Successes:Dealing with Ice
• Design• Environmental/
Geotechnical– Right of Way– trenching– slope
stabilization– thaw
settlement / frost heave
Ice lens
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Inertial Inspection Runs – GEOPIG
% Strain vs Time for Slope 92
0
0.5
1
1.5
2
2.5
3
3.5
1988 1990 1992 1994 1996 1998 2000
Year
Str
ain
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Integrity Management inPermafrost
• Geo-Pig
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Maintenance Activity – Pipe Replacement
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Maintenance Activities
Lenth of Ditchline Backfilled
48
37
4 20
10
20
30
40
50
60
1986 1987 1988 1989
Year
Len
gth
(km
)
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Maintenance Activities to Present
MaintenanceActivities
90/91 91/92 92/93 93/94 94/95 95/96 96/97 97/98 98/99 99/00 00/01
ILI KP 0 to KP336
ILI KP 336 to KP586
ILI KP 586 to KP869
Filling voids inwood chip cover
Installation ofadditionalinstrumentation
Forest fire impactremediation
Pipeline repairs Bathymetricsurveys
Note: ILI = In-Line Inspection
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Monitoring Activities
Activity Frequency/Monitoring Year
1998 1999 2000 2001 2002
Visual Reconnaissance Weekly Weekly Weekly Weekly Weekly
Detailed Reconnaissance September September September September September
Thaw Depth Investigation October Note 1 October Note 1 October
Instrumentation Readings Note 2 Note 2 Note 2 Note 2 Note 2
Inertial Geometry Tool(GEOPIG)
Norman Wellsto Zama
Norman Wellsto Wrigley
Norman Wellsto Mackenzie
Highway
Norman Wellsto Wrigley
Norman Wellsto Zama
Notes:1. Unless an ongoing review of instrumentation and other data indicates a need for thaw probing at a particular slope, no probing
will be conducted in odd numbered years.2. Instrumentation within 1 meter of the pipeline, for a distance of 140 km from Norman Wells, will be read on a monthly basis.
Remaining instrumentation will be read on a monthly or quarterly basis.
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Reporting to Regulators
• Annual Reports– Operations &
Maintenance Activities– Condition of Pipeline– Terrain Monitoring– Slope Monitoring and
Performance– Operations &
Monitoring Program– Right-of-way
Assessment
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Pipeline Maintenance
• Hauling propane to remote area valve sites.
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Field Personnel
• Employees are permanent residents of the communities of Norman Wells and Ft. Simpson.
• They provide significant contributions to the quality of life in the communities through their volunteer activities.
• Successful and enduring positive northern relationships are built and maintained on the basis of mutual honesty, respect and trust.
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Questions