Torstein Vinterstø Vice President Project Management ÅSC

Åsgard Subsea Gas Compression

Åsgard

transport

to Kårstø

Åsgard

transport

Kristin

Åsgard A

Åsgard B

Åsgard C

Smørbukk

Smørbukk sør

Midgard

• Increased recovery

• Accelerated production

• Reduced CAPEX / phased

investment

• Operational flexibility

• Reduced OPEX

• HSE benefits

• Benefits increase with step-out &

water depth: an enabler

Why subsea processing?

Minimum Flow Challenge Surge Wave Instabilities

A minimum gas rate is required to:

Avoid dynamical instabilities in flow lines

Surge wave instabilities exceeds liquid handling capacity

Maintain continuous MEG return to Åsgard B

Avoid hydrate incidents

Increased Oil Recovery

~15 years

~ 280 million b.o.e.

Da

ily

pro

du

cti

on

MS

m3/d

Cu

mu

lativ

e p

rod

uc

tion

GS

m3

Year

Åsgard Subsea Compression

2 x 11,5 MW subsea compressors

40 km step out

Water depth 250-325 meters

Production 21 Mill Sm3/d

CAPEX ~15 billion NOK

Field Layout Today

Field Layout Future

Subsea Modules

From Midgard X

From Midgard Y

From Midgard Z

& Mikkel A & B

Compression Station

Weight: 4752 tons

Size: 74x45x26 m

Manifold station

Weight: 865 tons

Size: 34x27x15 m

To Åsgard B

To Hot-Tap on Y-101

Process Flow Diagram

Process Modules- Sizes and Dry Weights

Inlet Cooler

Weight: 235 tons

Size: 15 x 10 x 7 m

Scrubber

Weight: 210 tons

Size: 8 x 8 x 12 m

Compressor

Weight: 289 tons

Size: 11 x 9 x 10 m

Discharge Cooler

Weight: 107 tons

Size: 9 x 7 x 5 m

Pump

Weight: 45 tons

Size: 5 x 5 x 6 m

FUTURE

EQUIPMENT

PA13 AREA

TURRET

Åsgard A – Topside Modifications

Power supply

Control module

Pump barrier fluid

UPS

Cable routing

Ship

Power is generated from the two existing LM6000 Gas Turbines

Generator A LNOx DLE type 39 MW

Generator B HNOx Dual fuel type 37 MW

Power demand:

ÅSC 26 MW

ÅSG A 18-22 MW

High Voltage Power Supply

HVAC equipment:

Transformers

Variable speed drives for pump and

compressors

Switchboards

Cooling & HVAC equipment

The shell of the canister

can be sliced down for

ease of access and

maintenance

Åsgard A Swivel Project

High voltage swivel element:

• 2 x 3 ph lines; Um = 24 kV, Im = 675 A

• 2 x 3 ph lines; Um = 52 kV, Im = 675 A

• Separate earth ring

Installed summer 2011

Umbilical System

Åsgard A

SCSt

Åsgard B

Static part ~42km

Power umbilical

Power cable

Dynamic part < 1500m

Fibre link

Combined umbilical

Umbilical

Compressor Power

Pump Power

Control Power

Pump Barrier Fluid

Fibre Optic

Cable splice

Technology Qualification

Scrubber

Cooler

Active Magnetic

Bearing Control

Power Cable Subsea Transformer HV Connectors and Penetrators Hot-Tap

All Electric Subsea Control System

Initiated 2007

Comprehensive Scope

Maturing Competitive Vendors

Motor and Compressor

Qualification of Subsea Compressor at K-lab

Technology Qualification Program

World’s first large scale test loop for subsea compressors

built 2007-2008

Qualification program initiated at K-lab 2008

M33 compressor qualified 2009 after 3150 running hours

Qualification of long- step-out, high voltage, high frequency

power supply by use of cable simulator 2009-2010

Testing with hydrocarbon gas, condensate, and water/MEG

Liquid injection up to 30 weight %

Several design improvements during qualification

R&V testing 2010-2011 on improved design

K-lab

K-lab

1

9

-

Classification: Internal 2011-08-29

Building New Test Facility K-lab

New Test Facility K-lab

Testing of Pilot and Delivery Compressors

K-lab modification 2011-2013

Shallow water test pit

11,5 MW compressor shaft power

17 million Sm3/d flow rate hydrocarbon gas

Condensate and water/MEG injection

Submerged test of pilot compressor 2013

Submerged test of delivery units 2014

Qualification and FUT/SIT

Control system

Qualification of components according to

ISO 13628 and TR 1233

MBC system

Electrical actuators

Compressor

Motor size verification

Marinisation

HV penetrator

Functional Unit Testing (FUT)

Pump - Tranby

Control system – Aberdeen

Compressor – K-lab

System Integration Test (SIT)

Trains - Egersund

Syste

m C

om

ple

xity

Installation and Intervention

Initial Installation:

• Modularised by construction vessel

Options for Intervention:

• Construction vessel with over the side

handling system

• New build vessel with large moonpool

The Intervention Challenge

• Requirement for year round

intervention (Hs 4.5)

• Module size and weight

15x12x12m

~400T

• Handling subsea processing

HC, N2, MEG

Intervention with SHS

North Sea Giant

• Built in 2011

• World largest Construction

vessel in its class

• DP3 capabilities

• Large deck space (2900 m2)

• 400 Tons crane

• Voith Schneider Propulsion

Special Handling System (SHS)

• Fabrication of SHS for initial installation modules

• Dynamic analysis and tests to ensure sufficient strength

• Tower dimensions: 17x20x32m (w,d,h) TBC

• Free lift height: 17,5m (vertical, over deck) TBC

• Pallet size: min.13,5x10m TBC

• HPU skid/container: 8x2,5x3m (each) TBC

Vessel vs. Subsea Technology Steps

Gullfaks

TOGI Statfjord sat

Åsgard

Ormen

Lange /

Snøhvit Tordis SSBI

Tyrihans

SRSWI

Subsea Compression

Subsea Factory •Normand Mjolne

•Viking Poseidon

•Far Saga

•Edda Fauna

Seven Viking

Subsea Processing

Intervention Vessel

Typical ÅSC SPI service functionality:

26 -

• Integrated large and heavy module handling system, i.e. 400 T in 4,5 m Hs,

• Accommodate for modules up to the size of 15 x 12 metres and height up to 12 metres

• Hydrocarbon venting system

• Chemical tanks and pumping system for N2 and MEG

Examples of monohull intervention solutions

Oil storage

Gas compression

Gas, oil, produced

water separation

Power distribution

and control

Manifold

Sea water injection

template with pumping

Produced water

injection template

Production

template Produced water

injection pump Production

template

ROV

intervention

Oil pump

Oil export

Gas export

The Statoil Subsea Factory™

Critical path – CCS3

Classificati

on: Internal

2012-08-24 2

8

Main Milestones

Topside

Modifications

Subsea

Compression System

Pipeline and

Marine Operations

D E S C R I P T I O N

Train 1&2

2011 2012 2013 2014

PDO Submittal

Comm.

SCMS/SCSt

#1EPC

DG4

Sta

rt-up

Milestone Engineering Fabrication/Testing Offshore activities

Pipeline Components

Pow er Cables and Umbilicals

DWHot Tap Development

Shut dow nModule lif t in

Hot Tap

PipelineComm.

Pilot

PDO Approval

DG3

#2

Engineering

Prep

Spools, Tie-in & Spools, Tie-in & RFO

SCSt

2015

MCPre-fab

Module

MC

Kårstø Shut-dow n

K-Lab mod.

First Gas

Run-in

RiserPull-in

SIT#1 SIT #2

FUT Pilot

FUT#2FUT#1

SCMS

System Comm.

Critical Path

Summary

Worlds first subsea compression plant to be realised at the Åsgard field

Subsea gas compression is an enabler for increased hydrocarbon recovery

Compact compressor technology with all-electric control system

Efficient module installation and retrieval method

Comprehensive technology qualification program

Ambition to achieve no quality failure

Planned start-up Q1 2015

Thank you Torstein Vinterstø

Vice President Project Management

kontovi@statoil.com, tel: +47 99 520 865

www.statoil.com