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Capability Presentation
Subsea SamplingRichard Barr
Thursday 8 February
Setting the scene
“The cynics say that we are a cyclical industry that never learns its lessons. Well this time we have an opportunity to do things differently – especially if we remind ourselves that we have been part of the problem and therefore we all need – including the cynics – to be part of the solution too.”
Deirdre Michie, CEO, Oil and Gas UK
Setting the scene
• Pivotal time in energy sector• Oil price down• Production down• Maximising economic recovery (MER)• CAPEX and OPEX spend reduced• Inefficiencies, over engineered, not fit-for-purpose
Complexity versus reliability: subsea systems
“Possible causes for decreased reliability include the systems are getting so complex with so many components, it is not theoretically possible to build each component to the quality required to have a high total system reliability.
In addition, oil companies and retirements have robbed the equipment suppliers of the experienced personnel required to build high reliability equipment.”
Preston Mason in collaboration with Bill Loth
Source: Penn Energy, Evolution of Subsea Well Technology, Mason, P. (Subsea Consultant, Granherne/KBR)http://images.pennnet.com/articles/os/cap/cap_z0607off-hist7.gif
Subsea Sampling
Sampling
You cannot manage what you cannot monitor
• Sampling could be described as the introduction of a controlled leak
• MER can be assisted through monitoring and managing the process, with an aim to ensuring…
– chemical treatments are optimised– unrestricted flow of fluids throughout– oil, gas and water streams meet specifications– integrity of the wells, pipeline and process
facilities…Through representative sampling.
Sampling - is prevention better than cure?
The sampling stage is critical in understanding exactly what is being produced
• Is prevention better than cure?– or don’t you cross that bridge until you come to it
• Spend a little, save a lot• The person who stops sampling to save costs, is like the person who stops the
clock to save time
Importance of subsea sampling
Provides solutions that support…• Integrity• Umbilical controls• Decommissioning• Chemical injection • Flow assurance issues• Metering and allocation• Production and operating efficiency
…maximising economic recovery
Subsea sampling benefits
Operational• Undiluted• No deferment• Chemical free• Near to source• Improved modelling• Upstream of deposit• No back-out calculations
Cleanliness• Reduced risk of release• More representative sample• Provides reassurance of system condition• At source result
Subsea sampling system considerations
The following parameters should be considered against actual requirements
• System deployment • System connection • System disconnection• Sample collection cylinders • Slops handling • Isothermal sampling
• Isobaric sampling• System control• System sensors• Phase biased sampling• Phase enrichment • Hydrate remediation
Proserv subsea sampling systems
• Our experience covers both ROVs and diver operated
• Collection from trees or manifolds• Samples return to surface for transport to
lab, or tested at site• Bespoke engineering to meet client
functional requirements and technical specifications including
– Closed system– Variable volume – Corrosive environment– Chemical back-flushing – Temperature maintenance
Proserv subsea sampling cylinder
• Manufactured in Aberdeen• Two litre sample volume • Valves qualified to API 6A-PR2• Removable nitrogen buffer chamber • Designed in accordance with PED
2014/68/EU• Materials compliant to ANSI / NACE MRO175
/ ISO 15156• Design pressure and temperature, 1,379 bar
and -29oC to 177oC• Qualified for use up to depths of up to 3,000
metres during sampling phase, in accordance with API 17D
Case Study
The challenge
Operator issue – 75% loss in production due to wax
Options• Review existing samples• Well intervention • Sample subsea
Several thousand barrels per day lost production from well
Design requirements• Closed loop• 2 x 2 litre slops cylinders• 6 x 2 litre sample cylinders• Water depth of ~100 metres• Pressure rating of 1,000 psi
minimum• Compact design to interface with
christmas tree• Isothermal sampling - circulation of
hot water within skid
The solution
Customer required urgent project delivery
• Operator’s challenge – obtain sample upstream of restriction
• Project delivery team established - including design engineers, project managers, buyers and technicians
• Cross site collaboration between Greenbank sampling product centre and our subsea services Birchmoss facility in short time frame
Customer benefits
Complete life-cycle in-house engineering package
• Design
• Manufacture
• Product testing
• Project manage
Proserv delivered an ingeniously simple, fit-for-purpose engineered solution.
Customer benefits
Cost effective sample upstream of pipeline restriction
• Representative fluid chemistry
• Optimise future chemical supply
• Improved understanding of flow-assurance
Removed potential of working the wrong solution, saves money.
Improved safety, reduced risks utilising subsea qualified sample cylinder.
Living our core values
Serious about service Round the clock support, commitment, and on the job expertise.
Entrepreneurial spirit Through creative thinking, and utilising experiences, a bespoke product was designed.
Right thing, right wayProvided a product fit-for-purpose, not over engineered, designed with ingenious simplicity in mind.
Help, share and communicateFrequent communication both internally, and with customer, resulted in an open relationship being established, and help ensure all parties were working effectively as one.
Forward as a team Working as one, united numerous personnel across different business functions.
To Summarise
Target audience for subsea sampling
Further questions
Richard Barr CChem, CSci, CMgr, Business Development Manager – Production Chemistry
T: +44 (0) 1224 737000D: +44 (0) 1224 737075
Proserv, 4 Greenbank Place, East Tullos, Aberdeen, AB12 3BT
[email protected] www.proserv.com
