Improved return on investment through increased production, enhanced recovery, and reduced cost

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Per Bloch Helmers, OneSubsea Subsea Expo 2018, Aberdeen

HOW ENABLING SUBSEA BOOSTINGTECHNOLOGY AND A NOVEL BUSINESSMODEL UNLOCK INCREASED RECOVERYFROM A REMOTE DEEPWATER FIELD

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1. Introduction to Dalmatian2. Development strategy3. Project overview4. Enabling technologies5. Business case6. Conclusions

Agenda

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Acknowledgements:

Mike Clarke, Murphy Exploration and ProductionArill Smaaland Hagland, OneSubsea

Desoto Canyon Field Development Gulf of Mexico, 260 km southeast

of New Orleans Two-well tie back Marginal developments, challenging in

current climate (2016); daisy-chained phased development most economic

Depletion drive, limited aquifer support

The Dalmatian Field

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Host: Chevron Petronius Platform• 550-m water depth• Limitations on pull tube and deck space

but available power

Phase 1: 35-km PIP oil well tieback and 38-km gas well tie back• 1,770-m water depth• Common 14 tube umbilical

Phase 2: 18-km extension to Phase 1• 1,980-m water depth

The Dalmatian Field

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DC4 #1DC48 #1

Subsea Pump• Lowers wellhead

pressure• Increases near-term

production• Captures additional

reserves

Petronius(Chevron)

DC134 #2

DC134 #1(future)

DC91(future)

Studies undertaken to look at IOR• Water injection• Artificial lift

Lowest reservoir risk and higher confidence in enhanced production via subsea boosting

Integrated modeling• GAP and OLGA* dynamic multiphase flow

simulator

Sanctioned on existing two well production• Future well opportunities and improved

economics with boosted production

EPCIC contract• Onus on contractor to manage

interface risk• Functional specification• Fit-for-purpose design

Development strategy

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Scope of supply (hardware):

Foundation Flowbase with interface arrangements Retrievable pump module Flowline jumpers Combined power and control umbilical Topside and subsea control system Topside power system Barrier fluid hydraulic power unit Tools and spares

Project overview

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Scope of services:

Transportation Site-receive testing Installation of subsea equipment

and umbilical Support during installation of topside

equipment Support during pre-commissioning,

commissioning, and startup Training

Project overview

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Mature and well-proven pump technology• Significant operating experience (>3mill hours)• Over 100 pump units• More than 200 MW of installed power

High-boost pump design• Result of joint industry partnership (JIP)

from 2007• Full-scale unit built and tested• Field proven on many projects

Dalmatian pump design• Heavily leveraged by JIP pump• Major reductions in risk, engineering, and lead

time• High-volume motor design key enabler

Enabling technologies

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High-voltage motor design• 35-km step-out without subsea transformers

or high-voltage connectors

Based on the standard motor design• Voltage rating increased • No change in insulation design

Full-scale qualification program• Test program completed in June 2016

Game changer for marginal long-step-out tiebacks• Reduces hardware scope and complexity

Enabling technologies

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Subsea Integration Alliance• Integrated schedule• Designed for installation• Interface management

Alternative business models Fit-for-purpose solution leveraging

previous experience

Committing to the Business Case

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Thank you

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