Unlocking barrels on a mature asset Andrea van Overveldt, Maersk Oil - - PowerPoint PPT Presentation

Unlocking barrels on a mature asset

Andrea van Overveldt, Maersk Oil DEVEX 9 May 2017

Gryphon FPSO-Producing the Limit

Gryphon

• 3 Fields
• Challenges to drill new wells
• Well reviews, facility reviews and produce-

the-limit workshops

• ‘Out of the box’ thinking required to add

more barrels

Subsea Infrastructure

• Shift focus from topside and well
• ptimisation to existing subsea

infrastructure

• Back-out effects and daisy chained wells

Tullich De-commingling

page 4

Focus on 100% Operated Field

• Old wells shut-in for commingled setup
• New manifold

Our approach

page 6

• Flow trial and IPSM modelling

performed

• Subsea scope
• Payback period

(1) P15 + P31 (2) P15 (3) P15 + P31 (4) P15 (5) P31 100 90 80 70 60 50 40 30 20 10

Results

• Successful Incident-Free execution,

within budget

• 1,200 bbls added
• Payback in 30 days

Other opportunities

page 8

Chasing Barrels

• Success increased confidence for other

projects

• P36/P38 re-route project initiated
• Learnings from Tullich project incorporated

Gryphon FPSO Tullich Manifold North Gryphon Metering Skid Gryphon Cluster Manifold Gryphon Framo MPM Manifold Water Injection Skid P12 P27 P25 P14B P15 P35 P31 P16 W2 W4 W5 A2 P28 P33 P29 P19 P24 P36 P17 P20 P22 P23 P26 P32 P34 P30 P11

P11 Choke Skid

G1

Px Gx W/Ax

Production Lines Gas Lines Water Lines Producing Wells Wells used as Gas injector Water Injection Wells

P39 P37 P38

TESTLINE

P36/P38 Re-route

P36 prod flexible

P17 prod flexible New commingling drop down spool

Conclusions and Lessons Learned

• Two subsea infrastructure projects

successfully completed

• Successful approach:
• payback period
• robust modelling
• flow trials
• integrated approach with subsea team
• Future projects require procurement of

production flowline