Subsea Field Development and Production Enhancement (IOR)

byJan O. HallsetTechnology DirectorPoseidon Group September 2009

Presented at Offshore Europe 2009 in Aberdeen

Poseidon Group

Specialists in subsea systems:Engineering & studiesSolutions & equipment packages (EPC)Installation & operational support

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Slide Slide 22

A Subsea Field Development?

Slide Slide 33

Components in a Subsea Production System

Topsides Process

Well

Umbilical

Flowline

Reservoir

Manifold Well Head

Slide Slide 44

Platform

Field development architectures: Manifold, individual wells or daisy chained well; tied back to aproduction facility

W1 W2 W3 W4

W5W6 W7

W8

Daisy chain

Slide Slide 55

Individual tie back

W1

W2

W3

W4Manifold

with 4 wells

Start with a Study to Establish the Concept

Slide Slide 66

Girrasol(Total) : Well clusters with manifolds

Slide Slide 77

1400 meters depth

Ormen Lange (Shell): Long Step out / Deep Water

Slide Slide 88

Template B

Template A

PLET

42” export line

2 x 30” flow line2xMEG + 2x Umb

Shore terminal

120 km from land850 meters depth

What tools can be used for IOR (Increased Oil Recovery) given the typical production profile for gas/oil wells?

Slide Slide 99

Time

We want to lift the curve

Prod

uctio

n R

ate

Slide Slide 1010

Possible “Tools”

Flowline (size & step-out)

Riser (size & depth)Production = PI (P_res – P_bh)

P_resP_bh

Inject water to maintain reservoir pressure

Reduce wellhead pressure by subsea boosting and compression

Reduce pressure drop and increase flowlinecapacity by removing water subsea

P_top

King (BP): BoostingStatus for Tools

(=Subsea Processing)

Now:Boosting (Multiphase)Raw water injectionElectric submersible pumps(ESP)Bulk separation

Near future:Water treatmentGas compressionCompact separation

Slide Slide 1111

Tyrihans (Statoil): Water Injection

Slide Slide 1212

Yme Redevelopment (Talisman) – ESP

Tordis (Statoil): Subsea Separation and Boosting

Slide Slide 1313

Pazflor (Total): Subsea Separation and Boosting

Slide Slide 1414

Ormen Lange (Shell): Subsea Compression

Length: 60m

Width: 38m

Height: 12m

Weight: 3,300 t

Slide Slide 1515

Slide Slide 1616

What about CAPEX and OPEX? Example based on Subsea Treatment of Injection Water

Injection of treated seawater from topsides is the most common method for Increased Oil Recovery (IOR) :

Maintains reservoir pressure Drives the oil to producing wells

Our new SWIT technology allows a treatment system to be placed on the seabed

NOTE: Treatment is essential for long-term protection for the reservoir

Slide Slide 1717

Base Case -Topside Water Treatment

Seawaterintake

HP pipeline

Water Treatment

Plant

Slide Slide 1818

SWIT Enables Seabed Based Water Treatment

SeawaterintakePower

cable

Save on major cost itemsTopside treatmentHP PipelineLow OPEXCAPEX when needed

SWIT

Slide Slide 1919

SWIT Application: Fully Integrated System for Water Injection to a Satellite Field

Slide Slide 2020

•SWIT at the seabed: 24 mill$•Flowline from topside: 52 mill$-> More than 50% cost saving

30,000 BPD 275 Bar

2.5 MWattPower cable only