11_Husebo - Tracerco Separator
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Transcript of 11_Husebo - Tracerco Separator
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Separator Control inChallenging Conditions
Measuring Sand to Foam inTar Sands to Desalter Applications
ByMagne K. HusebøTracerco Norge AS
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Ins igh t Ons i te
• Process Diagnostics• Measurement Systems• Flow Assurance
Aberdeen Baku Bankok Bergen Billingham Haag HoustonKuala Lumpur Oldenburg Oman Milano Perth Port of Spain Rio
Sarnia Shanghai
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Tracerco Profiler ™
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North America - 48
Russia - 6
SE Asia - 11
Scandinavia - 68UK - 26
China - 26
FSU - 6
South America - 12West Africa – 32
MENA – 23Australia – 11
Tracerco Profiler ™ – approaching 270 units
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Heavy oil applications:
• Offshore separators• Tar sand applications• Refinery: heavy oil desalter applications
Tracerco Profiler ™
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Tracerco Profiler ™, heavy oil references:
Field / Asset: Applicaton: Installation
StatoilHydro Grane, Norway (API 18,7) Separator Control 2003
SunCrude, OilSands, Canada Separator Control 2005
Shell Canada, Oil Sands, Canada Separator Control 2006
Suncor Energy, Oil sands, Canada Separator Control 2007
BP Cherry Point, USA Desalter (Refinery) 2007(BP Helios Award)
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Tracerco Profiler ™, heavy oil references:
Field / Asset: Applicaton: Installation:
StatoilHydro Grane, Norway (API 18,7) Separator Control 2003
SunCrude, OilSands, Canada Separator Control 2005Shell Canada, Oil Sands, Canada Separator Control 2006
Suncor Energy, Oil sands, Canada Separator Control 2007
BP Cherry Point, USA Desalter (Refinery) 2007(BP Helios Award)
New Project:
Heavy Oil FPSO (13,8 API) Separator Control PO just released
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• No significant interface between water and oil
• High viscosity: High separation temperature
• High viscosity: Oil buid-up at measurement probes
•Solids in oil
Measurement in heavy oil separators – challenges:
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Level Measuremet in Heavy Oil
Tar Sand Applications
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Oil SandsOil/Water/soilds separation
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Oil SandsOil/Water/soilds separationPrinciples of Operation
Oil / Water / Solids
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Oil SandsInstallation of Tracerco Profiler Installed (2005)
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Oil SandsTracerco Profiler
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Level Measuremet in Heavy Oil
Offshore Gravity separators.
StatoilHydroGrane Platform
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StatoilHydro Grane Separator Level Instruments:
2001 Design
- Separator level instruments:Capacitance, Ultrasonic, Level Sight Glasses,Traditional Gamma Measurement & Gamma Profilers
2003 Operation
- 90% production through-put
2005 Control / Measurement Task Force start-up
- Evaluation of all measurement principles installed
2007 Task force program completed:
- Successful use of enhanced Tracerco Profilermeasurement algorithm
Source: Nivåmåling med Profilstav, R. Åsheim, SH, Offshore Instrumentering 2008, TeknaTeknisk Ukeblad, Grane over på Auto, June 2007
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Grane 1st stage Separator
Profiler
Oil/Water InterfaceLevel
Level GlassOil/Water InterfaceIndication
Control Algorithm
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Measurement of API10 Oil?
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Measurement of API10 Oil?
Yes,
Tracerco Profiler: Am241 isotope
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Measurement of API10 Oil?
Yes,
Tracerco Profiler: Am241 isotope
Absorbtion factor water = Absorbtion factor oil
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Measurement of API10 Oil vs water?
Yes,
Tracerco Profiler: Am241 isotope
Absorbtion factor water = Absorbtion factor oil
The uncorrected density measurement valuedestinguishes between water and oil at similar density.
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Real Density scale
50 kg/m3
Apperant Density Changefor 70 kg/m3
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Level Measuremet in Heavy Oil
Desalter applictions.
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Level Measuremet in Heavy Oil
Desalter applictions.
Challenge: High Temperature
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Tracerco Profiler – Desalter Application
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3 mm water / glycol
Cooling jacket
Max temp. 200 deg C
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Solid build-up!
- How to secure separator level measurement!
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930
960
990
1020
1050
1080
1110
1140
1170
1200
1230
1260
1.00.90.75
Oil Emulsion Water
Level/mm
Density
Defined density bands
Detectors
GammaDetector
Rod
GammaSource
Rod
Sources
Normal operation
1290
Gas
0.4
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930
960
990
1020
1050
1080
1110
1140
1170
1200
1230
1260
1.00.90.75
Oil Water
Level/mm
Density
Defined density bands
GammaDetector
Rod
GammaSource
Rod
Measurement offset by solid build-up
0.4
DetectorsSources
Gas Emulsion
DensityOffset
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930
960
990
1020
1050
1080
1110
1140
1170
1200
1230
1260
1.00.90.75
Oil Water
Level/mm
Density
Defined density bands
GammaDetector
Rod
GammaSource
Rod
Adjustment by known density (gas)
0.4
DetectorsSources
Gas Emulsion
DensityOffset i.eCorrection
Value
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930
960
990
1020
1050
1080
1110
1140
1170
1200
1230
1260
1.00.90.75
Oil Water
Level/mm
Density
Defined density bands
GammaDetector
Rod
GammaSource
Rod
Correted for HC solid build-up
0.4
Gas Emulsion
Correction
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Heavy Oil
Future SeparationMeasurement applications
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Tracerco Profiler
Pipeline Clamp-on version
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Insigh t Onsi te
Thank You for your attention!