Real time monitoring for oil production and drilling

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Real time monitoring for oil production and drilling By Tor Inge Waag, Dr. Ing Sensorlink AS

Transcript of Real time monitoring for oil production and drilling

Page 1: Real time monitoring for oil production and drilling

Real time monitoring for oil production and drilling

By Tor Inge Waag, Dr. IngSensorlink AS

Page 2: Real time monitoring for oil production and drilling

About Sensorlink

• Sensorlink is a Hi-Tech company

– concentrating on real time monitoring

of important data for oil production and

drilling.

• Our products can be accessed in real

time from offshore and onshore locations

– enabling field and office teams to

share data and make joint decisions

quickly.

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About Sensorlink

• Established in 1997– Trondheim, Stavanger, and Houston

• High level of technical competence and experience– Electronics, physics, acoustics, IT,

signal processing, mathematical modelling, materials and production (corrosion)

• Cooperation with NTNU, thesis work(good place for recruitment !)– Master students– PhD students

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Sensorlink technology

• ELF (electromagnetic

Extremely Low Frequency)

system for through steel wall

communication

– Spin-off: Pistontrack,

an accumulator monitoring

system on floating rigs

• Ultramonit, multichannel

ultrasound for monitoring

purposes

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UltramonitTM – what is it used for

• Real time corrosion and erosion monitoring

• Benchmarking of results from other inspection methods

• Monitoring of found defects• Effects of corrosion inhibitors• High resolution

– detects corrosion rates of 0.1 mm per year or better

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Ultrasound

• Sound waves with frequencies higher than 20kHz

• Applications: – Medicine (ultrasound imaging,

intravascular flow measurement, tissue characterization)‏

– NDT (thickness measurement, flaw detection, imaging)‏

– Flow measurements– etc...

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Ultrasound at Sensorlink

• Direct wall thickness

measurements

• Multiple (hundreds of)

ultrasonic transducers are built into a clamp, shaped to fit the pipe

• New pipes or retrofit

• Real time monitoring

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In-house developed electronics for ultrasound

• Designed for high pressure, marine operations

• Extremely good signal to noise ratio

• Low power consumption

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Datalogger

• The datalogger includes – a mini PC– memory card– batteries

It controls the clamp, records data and provides real time communication

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Transducer design

transducer

Cross section of pipe wall with defect

defect

Wave propagation computed by 2D numerical model

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Ultrasound pulse - echo waveform

thickness = t*c/2

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Data logger Internet

Salt water or added acidNeutral fluid

Steel test sample

Ultrasonic transducer

Plastic sleeve

Ultrasoundinstrumentation

On-line long term laboratory testing

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Three weeks of data, showing the effect on corrosion rate of changing pH

http://www.sensorlink.no

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Corrosion measured in 24 hours in the laboratory

http://lab.sensorlink.no

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Pilot installation, onshore gas processing plant

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CO2 corrosion in pipeline bend

7,0

7,5

8,0

8,5

9,0

9,5

10,0

des 6

jan

3

jan

31

feb

28

mar

28

ap

r 25

mai

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jun

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jul

18

au

g 1

5

sep

12

Date

Wall

thic

kness [m

m]

Position 0° (upwards)

Position 90° (inwards)

Long term field measurements at processing plant

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Results from the gas plant installation:

• Results in excellent agreement with other NDT methods

• Corrosion was consistently detected, and the pipe was replaced earlier than planned

• The high resolution gives very rapid estimation of corrosion rates, at an accuracy of 0.1 mm/year or better

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Real oil field installation

• The clamp is installed by a Remote Operated Vehicle

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Ultramonit Clamp for a 34” export pipeline

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A whole lot of equipment goes to sea

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Installation completed

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Latest installation, on a 14” water injection riser

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Movie taken by ROV during installation