Measurement Uncertainty for the Oil & Gas Industry (MUO&G2002)

Venue: Courtyard Houston Westchase

Location: HOUSTON, Texas 77042,

Event Date/Time: Mar 14, 2002 End Date/Time: Mar 14, 2002
Registration Date: Mar 13, 2002
Report as Spam



Measurement can never be an exact science and data from measurement systems and instruments is, by definition, not absolutely accurate and often can be very inaccurate. As regulations tighten and commercial pressures increase it is vital for the instrument engineer both to know the uncertainty associated with results, data and readings and to know the factors contributing most to that uncertainty. Performing uncertainty analyses can assist with improving efficiency and the cost-effective design and operation of a measurement system.

The authoritative guide document entitled Guide to the Expression of Uncertainty in Measurement (GUM) is accepted by most Standards Bodies and Organizations as the reference document in this subject. It was developed largely by the international metrology community and, although rigorous in its approach and comprehensive in its coverage, it presents the evaluation of uncertainty as a daunting task for those involved in measurement in the field.


The Workshop will present the GUM methodology in a simplified and practical manner that will enable practicing measurement engineers to assess the uncertainty of their data by following a simple step-by-step procedure.

The technical program is designed to give an understanding of the process through examples tailored to the oil and gas sector, and the delegates will have the opportunity to apply the methods described to simple but practical case studies.


This workshop is targeted at engineers who are concerned with all aspects of flow metering from design to end use. Although specifically aimed at flow measurement in the oil and gas industry, the workshop will be of equal benefit to engineers in other industrial sectors and with other measurement requirements. Delegates should bring their own scientific electronic calculator.


Denis Boam joined NEL in 1976 having graduated in mechanical engineering at the University of Manchester in 1970. In recent years he has been closely involved in uncertainty analysis, undertaking consultancy work for many clients in the oil and gas industry. He has also been involved in the updating of the International Standard on uncertainty in flow measurement. In addition, he is responsible for the management of the UK’s international intercomparison program on flow measurement and of the NEL-Strathclyde University Postgraduate Training Partnership.

Jane Sattary joined NEL in 1985, she is a chartered engineer and has been engaged in measurement uncertainty consultancy work since 1989. She is also involved in many National and International Standards Committees including recently taking up the post of Co-chair of a top level International Committee on measurement uncertainty. She has presented her work at many conferences, seminars and workshops and has also run specialist in-house courses. She is currently Process Sector Manager at NEL and as such has responsibility for business development within the oil and gas sector.


NEL is an international organization with clients throughout the world. It provides engineering expertise on process and energy systems and structural testing. NEL is particularly strong in the area of fluid flow and has a wide range of test facilities. It holds the UK National Standard for oil, gas and water flow measurement.

NEL’s flow facilities are used to feed high quality data into government research programs upon which international standards are based. They are also used by industry for flowmeter and flow-component calibration, test and evaluations. In addition, NEL runs collaborative projects on topics such as multiphase flow and wet gas metering.

NEL has 50 years’ experience in flow measurement and combines its data analysis expertise with test results and flow simulation studies to provide a comprehensive consultancy service including:

 uncertainty analysis
 performance evaluations
 flow systems & rig design
 troubleshooting
 independent third party audit & expert witness services


Courtyard Houston Westchase, 9975 Westheimer Rd, Houston, Texas 77042, USA.


0900 – 0930 Registration and coffee

0930 – 1000 Introduction and overview of uncertainty – Jane Sattary
What it is and why it is important; sources of uncertainty

1000 – 1030 Basic calculation methods – Denis Boam
Handling repeated measurements; assessing probability

1030 – 1045 Coffee

1045 – 1115 Sensitivity coefficients – Jane Sattary
The vital link between what you measure and the required output

1115 – 1145 Combination of uncertainties – Denis Boam
Finding the overall uncertainty and expressing confidence in the result

1145 – 1215 Alternative approaches – Jane Sattary
An engineering approach designed to focus on the key issues

1215 – 1230 Discussion

1230 – 1330 Lunch

1330 – 1345 Correlations – Denis Boam
How do links between various inputs affect the result?

1345 – 1400 Software Package including Monte Carlo Simulation – Denis Boam
Computer-based simulation of the uncertainty problem – its advantages and disadvantages

1400 – 1430 Worked example – Jane Sattary
A practical example based on oil industry calibration practice

1430 – 1500 Exercises – You, the delegates
A chance to put what you have learnt into practice under the watchful eyes of the presenters; bring your calculator

1500 – 1530 Solutions to the exercises – Denis Boam

1530 – 1545 Summary and Discussion


9975 Westheimer Rd
Texas 77042

Additional Information

WORKSHOP FEES The registration fee for this workshop is $395. This price includes delegate fees, lunch and refreshments, and workshop documentation comprising comprehensive course notes, copies of all presentations and worked examples.