18
Footer Footer 0 Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers Topsides facilities Backpressure on reservoirs: ∆P/L – 50-70mbar/m Limitations in pumping technology - Multiphase Flow assurance issues slugging flow, hydrates etc. Topsides bottlenecks Increased water production, sand etc. Overall effects Reduced production rates and recoverable reserves Subsea separation systems

Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Embed Size (px)

Citation preview

Page 1: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 0

Conventional Subsea

production system

Advanced Subsea

processing system

Reservoir

Subsea

XT

Flowlines

Manifold

Risers

Topsides

facilities

• Backpressure on reservoirs:

∆P/L – 50-70mbar/m

• Limitations in pumping

technology - Multiphase

• Flow assurance issues –

slugging flow, hydrates etc.

• Topsides bottlenecks – Increased

water production, sand etc.

• Overall effects – Reduced

production rates and recoverable

reserves

Subsea separation systems

Page 2: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 1

Major Subsea Processing Projects

Greenfield Brownfield

Troll Pilot

• Brownfield

• Gas/Oil/Water/Sand Separation

• Water Injection

• Installed 2001

Åsgard

• Brownfield

• Gas Compression

• To be installed 2015

Marimba VASPS • Brownfield • Gas/Liquid Separation • Boosting to topside • Installed 2001

Tordis

• Brownfield

• Gas/Oil/Water/Sand Separation

• Boosting/Water Injection

• Installed 2007

Pazflor

• Greenfield

• Gas/Liquid Separation

• Boosting to topside

• Installed 2011

BC-10 Ph 1 & 2

• Greenfield

• Gas/Liquid Separation

• Boosting to topside

• Installed 2009

Perdido

• Greenfield

• Gas/Liquid Separation

• Boosting to topside

• Installed 2010

Marlim

• Brownfield

• Gas/Oil/Water/Sand Separation

• Water Injection

• Installed 2012

Gullfaks

• Brownfield

• Wet Gas Compression

• To be installed 2015

Page 3: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 2

Quick overview – Subsea separation systems

FMC Technologies subsea systems:

• Gas/liquid separation and boosting

• Liquid-Liquid separation

• Bulk water separation & Re-injection

• How is sand managed in subsea

separation systems ?

• What to do with the sand ?

Page 4: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer

Sand Handling Experience in Subsea Processing

Applications

Adekunle Opawale, Tarig Abdalla, and Remko Westra

FMC Technologies (Separation Innovation & Research Centre), Europe

6th European Sand Management Forum, March 2014.

Page 5: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 4

Presentation outline

• Subsea sand management technologies - Overview

• Technology developments & Qualifications

• Recent advancements in desanding technologies for

subsea applications

• Conclusions & Questions

Page 6: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer

Statoil Tordis subsea separation,

Boosting & Injection system (SSBI)

• Brown field – Operated by Statoil

• Challenges - Increased water production (70-80%) & sand production (500kg/day)

• SSBI – Gas / Liquid, Liquid/Liquid and sand handling, installed 2007

World’s first subsea separation system

• Utilizes a dual Sand handling concept – Vessel based & Gravity desander

Tordis SSBI Technology

Page 7: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 6

Tordis SSBI - Process Flow Diagram

Page 8: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 7

Tordis: Sand management concept – Separator based

Specially designed jetting nozzles

Slurry Suction system – Merpro TORE.

• Sand jet technology fluidizes

accumulated sand.

• Mepro Tore technology - only

Pressure suction

• Nozzles header installed from

the vessel repose angle – 34 deg

• Laterally spaced – 50%

overlapping

Page 9: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 8

Tordis: Sand management concept – Desander Vessel

• Idea is to protect WIP from such large

particles (100 microns)

• Pump dynamic pressure is used as a

motive fluid for slurry suction

• Produced water and sand injected back

into reservoir.

Page 10: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer

• Brown field – Operated by Petrobras

• Challenges - Heavy oil production, declining reservoir pressure, increasing water &

sand production

• SSS achieves G/L, L/L and 3 stages of sand separation, installed 2009

Producing well

Injection well

Marlim SSS Technology

Page 11: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer

Marlim - Process flow Diagram

Page 12: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 11

Multiphase desander

Protects entire subsea equipments from sand damage - >60%

Water desander

Protect injection wells from sand >50microns

Sand handling in Petrobras Marlim subsea system

Multiphase desander Liquid desander

Optimized sand jet technology

Prevents sand from accumulating in the bottom of separator

Page 13: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 12

Sand handling in Petrobras Marlim subsea system -2

• Fluid enters the desander axially

• Pressure energy + swirl element initiates circular motion – Centrifugal force.

• Developed G-force separates sand particles from process stream.

• Clean underflow reverses to outlet through the internal low pressure core.

• Sand slurry; through the desander reject

Inline desander – Technical background

Page 14: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 13

Total’s Pazflor subsea Gas-liquid subsea Sep. & Boosting

• Heavy & Viscous fluid produced

• High GVF, and low temperature – Potentials of Hydrate

• Relatively low reservoir energy

• Gas-liquid separation. Liquid boosting & gas flows freely to topsides

• Low produced sand; <100ppm

Page 15: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 14

Pazflor Sand management strategy – TQP 2008

Risk of sand accumulation in inlet pipe investigated during TQP, and avoided in real design.

• Proprietary sand flushing arrangement installed as a back-up.

• Removes any sand build-up during operation.

Page 16: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 15

Advanced sand removal system for future subsea applications

• Better efficiency

• Less vessel disturbance

• Less water consumption

• Minimal risk of clogging

Dual Vessel Desanding system – Integrated sand jet and pressure suction

Ref: IPTC 17643

Page 17: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer 16

Conclusion

• Sand handling technologies featured in the subsea

processing systems are unique, high-tech & innovative

• Marlim – Compact inline desander + optimized Sand jet

• Tordis – Dual (&Independent) sand handling systems

• Pazflor - Proprietary sand flushing system

• Advanced sand handling systems for future subsea

Applications.

• Dual Vessel Desanding system – Integrated sand

Jetting + pressure suction

Page 18: Conventional Subsea Advanced Subsea production system ... · Conventional Subsea production system Advanced Subsea processing system Reservoir Subsea XT Flowlines Manifold Risers

Footer Footer

Our dream….all processing subsea !

Thank

you.