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