Pipeline Mapping in Egypt
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Transcript of Pipeline Mapping in Egypt
Pipeline Mapping In Egypt
Presentation to Institution of Civil Engineering Surveyors
Glasgow University
October 22 2002
Paul Shaw - GeoVision
Pipeline Mapping In Egypt
Overview of the project
The Inspection PIG
Reflections
Egypt - General Facts (1)
Climate - desert
Religion – 94% Moslem, 6% others
Data and map taken from the CIA World Facts WEB page
Government Type - Republic
Natural resources - Oil,gas..
Language – Arabic
Egypt – General Facts (2)
Great pressure on the Nile
Population – 70.7m
Economy currently in recession
Development of a gas export market is key
Rapid urbanisation
Data and map taken from the CIA World Facts WEB page
GASCO
Formed 1997 to take control of gas transmission
Over 3000km of pipelines
Pipelines mainly buried
Health and safety responsibility
Issues from a Consultancy perspective
Control network?
Co-ordinate system?
Mapping?
Inspection PIG?
GIS?
GASCO geomatics knowledge?
GASCO survey equipment?
Issues from a personal perspective
I spoke little Arabic
I didn’t know anything about PIGS!
My knowledge of satellite imagery was limited
My knowledge of GIS integration was extremely rusty
Could I make changes to the specification?
Pipeline Mapping In Egypt
Overview of the project
The Inspection PIG
PIGS
Foam pig
Cleaning pig (can be run several times)
Profile pig
Cup pig (with gauge plates to 85% of pipe)
Bend detection pig
Inspection PIGAssets – welds, valves, CP points
Defects – corrosion, dents, eccentricity
Measured using Magnetic flux leakage
Picture from http://www.battelle.org/pipetechnology/MFL/Links/tutorial2.html?
Picture from http://www.bakerhughes.com/bakerhughes/pipeline_management/pmg_tools_mfl.htm
Inspection PIGAssets – welds, valves, CP points
Defects – corrosion, dents, eccentricity
Chainage defined by 3 Odometers.
INS fitted in GASCO’s Inspection PIG
Measured using Magnetic flux leakage
A data collection tool!
Potential sources of error
Scale error
Slippage and shimmy
Odometer
Above ground control
Accuracy
Correlation with the INS
Gyro and accelerometer scale/bias error
INS
Eccentricity
Error modelling
Model taken from Honeywell report, 1996
Practical implicationsINS drift of 0.005 degrees per hour
First magloggers positioned on the ground every 1km
Position; Time; Wrong point; Not turned on/Battery ran out
GASCO specification was for a positional accuracy of any asset to 1m
PIG travels at 3.2metres per second……..
El Saff to El Korimat
Upstream Girth Weld
Relative Distance(metres)
Absolute Distance(metres)
Comment Elevation (m)
10 0.0 0.0 31° 19' 24.1697'' 29° 34' 3.7444'' 64.4 0.6 0.6 BALL VALVE
20 1.3 1.3 31° 19' 24.1319'' 29° 34' 3.7141'' 64.4 0.2 1.4 SUPPORT
30 0.5 1.7 31° 19' 24.1196'' 29° 34' 3.7034'' 64.440 0.5 2.2 31° 19' 24.1064'' 29° 34' 3.6918'' 64.3
0.4 2.7 550 MM OFFTAKE-FORGED 50 0.9 3.1 31° 19' 24.0840'' 29° 34' 3.6725'' 64.2
0.3 3.3 25 MM OFFTAKE-WELDOLET 0.5 3.6 25 MM OFFTAKE-WELDOLET
60 1.0 4.1 31° 19' 24.0583'' 29° 34' 3.6498'' 64.0 0.5 4.6 JOINT-INSULATED
70 1.0 5.1 31° 19' 24.0316'' 29° 34' 3.6271'' 63.9 0.3 5.4 SUPPORT
80 0.5 5.6 31° 19' 24.0178'' 29° 34' 3.6153'' 63.8 2.1 7.7 BEND-HOT PULLED
90 3.5 9.1 31° 19' 23.9305'' 29° 34' 3.5359'' 62.9 1.5 10.6 BEND-HOT PULLED
100 3.4 12.6 31° 19' 23.8702'' 29° 34' 3.4656'' 60.8 1.6 14.2 SUPPORT
110 8.8 21.4 31° 19' 23.6401'' 29° 34' 3.2668'' 59.6120 3.9 25.3 31° 19' 23.5362'' 29° 34' 3.1776'' 59.0130 2.2 27.5 31° 19' 23.4789'' 29° 34' 3.1282'' 58.7140 12.2 39.7 31° 19' 23.1592'' 29° 34' 2.8531'' 57.0150 11.1 50.8 31° 19' 22.8625'' 29° 34' 2.6034'' 56.0
Longitude Latitude
Line Weld Nearest Comments16f Chainage Eg Ng Eg Ng dE dN Linear magnet(km)
Valve 18680+0.5 480110.9 3173050.8 480111.2 3173050.6 -0.3 0.2 0.4 1.3 Bakr VR3Weld 18690 480110.7 3173051.1 480110.9 3173051.0 -0.2 0.1 0.2 1.3 Bakr VR3Weld 18680 480110.8 3173050.6 480111.5 3173050.1 -0.7 0.5 0.8 1.3 Bakr VR3
Weld 36050 470516.5 3190736.7 470516.6 3190736.1 -0.1 0.6 0.6 0.3 Bakr VR4Weld 36060 470516.0 3190737.4 470516.1 3190737.0 -0.1 0.4 0.4 0.3 Bakr VR4Valve 36050+0.5 470516.5 3190737.0 470516.4 3190736.6 0.1 0.4 0.4 0.3 Bakr VR4
Weld 53960 462770.4 3209474.1 462770.2 3209474.3 0.2 -0.2 0.2 0.0 Bakr VR5Weld 53970 462770.3 3209474.7 462770.3 3209474.8 0.0 -0.1 0.1 0.0 Bakr VR5Valve 53970+0.9 462770.3 3209476.4 462770.4 3209475.7 -0.1 0.7 0.7 0.0 Bakr VR5
16g Weld Eg Ng Eg Ng dE dN Linear magnetValve 10+0.6 462774.6 3209472.7 462775.1 3209472.4 -0.5 0.3 0.6 0.0 Bakr VR5Weld 20 462774.7 3209473.5 462775.1 3209472.9 -0.4 0.6 0.7 0.0 Bakr VR5
400mm O/T 9290+0.3 463432.7 3220104.4 463432.9 3220104.7 -0.2 -0.3 0.4 1.1 Bakr VR 6Valve 9340+0.2 463432.5 3220117.9 463432.8 3220118.9 -0.3 -1.0 1.0 1.1 Bakr VR 6
50mm O/T 9350+1 463431.8 3220119.3 463432.8 3220119.1 -1.0 0.2 1.0 1.1 Bakr VR 6
Valve 37610+0.3 456662.5 3251158.0 456662.7 3251159.0 -0.2 -1.0 1.0 1.2 Bakr VR 750mm O/T 37620+0.9 456662.2 3251159.2 456662.0 3251159.8 0.2 -0.6 0.6 1.2 Bakr VR 7
Weld 37860 456647.2 3251333.0 456647.0 3251333.3 0.2 -0.3 0.4 1.0 End bend
As Built Theoretical Difference (m)
GASCO summary
‘To use the latest global technologies in the construction, the latest global technologies in the construction, management and maintenance of gas grid pipelines, management and maintenance of gas grid pipelines,
utilities and facilities in both economical and safe utilities and facilities in both economical and safe means’means’
So why did GASCO use this technology?
There is always a risk in using new technologies.
Pipeline Mapping In Egypt
Overview of the project
The Inspection PIG
Reflections
Reflections (1)
+ survey 140km in a day
- requires a first order control network based on WGS84
The Inspection Pig has strengths and weaknesses -
+ integrates defects and assets with position
- does not give depth below the ground
- does not survey assets away from the pipe
+ ideal for unmapped pipes in difficult terrain
Reflections (2)
What has this experience told me about Geomatics training?
Geodesy is still critical
An ability to differentiate between Geomatic softwares
….but there are other important criteria
An understanding of different types and uses of mapping
Data quality – know how to analyse
Reflections (3)There is more to being a consultant than technical knowledge…….
Pro-active – collaborate with the stakeholders
Patience – expect the unexpected
Communication – confirm and confirm again
Organisational Politics
Intuition – use it
Selling
and finally…
Working overseas can be fun
Do take the risk
It’s the quality and range of experience that’s important, not just the money
GeoVision
Thank you for coming
This presentation can be viewed at
www.geovision.co.uk/pipeline-mapping/GUlecture-Oct02