Elektrifisering av ValhallCO2-Har måneferden tatt av?

Sverre Gilje, BP Norge04.01.2008

Kraftteam Visjon

Don

Ecofisk(210MW)

Forties(270MW)

11

Bruce(150MW)

Miller(200MW)2

2Saltir(165MW)

Oseberg(200MW)

NWHutton(650MW)

Grand Scheme

• HVDC transmission scheme• Several technical options• 7 Hubs• 68 platforms included - 15 excluded (short life)• Average life 15 years (base)• 2 GWs offshore load• >99.8% availability• 7 million te pa CO2 saving• 0.6 bcf gas sales increase• >$2bn capex

Economic Environmental

Social

Focus: Phase 1 as first step,

then Phase 2 ...

... where BPA interests lie.

3

Power Project – Reference Case

Ekofisk(190MW)

Forties(199MW)

12

Judy

Valhall

Ekofisk

Elgin Gyda

Eldfisk

Ula

Fulmar

Auk

Clyde

Gannet

Kittiwake

Everest

ETAP

Forties

Alba

Britannia

Andrew

Armada

Montrose

Nelson

DC TransmissionAC Distribution

Customer IncludedCustomer Excluded

Shearwater

SleipnerKårstø

Blyth

Peterhead

220 MW

220 MW 220 MW

220 MW

100 MW 100 MW 95 MW 95 MW

+ 150 kV

- 150 kV

Phase 1 (2003)Phase 2 (2004)

• Customer buy in /Attitude

• Env. Focus/Taxes

• Complexity/Cost

• Limited Gas disposal

4

Ekofisk(190MW)

Forties(199MW)

12

Judy

Valhall

Ekofisk

Elgin Gyda

UlaGannet

ETAP

FortiesBritannia

Nelson

Shearwater

SleipnerKarsto

Peterhead

(135MW)DC Transmission

AC Distribution

Ana Sira

Peterhead

Valhall

Ekofisk

Gyda

Ula

Reference CaseCapex too high cf to benefits

1. Reduce DC Capex – Feed from Norway only2. Reduce DC Capex – One Hub only

4. Reduce AC Capex – 4 Customers Only

Option 12

3. Reduce DC Capex – Lower Converter Rating

North Sea Power project, Reference Case ���� Option 12

5. Minimum customer risk – BP and Phillips

6. Maximise customer benefits – Norway only

5

Technical concept

dc/ac

Ula

Gyda

Ekofisk

Valhall

Ekofisk2/4G

3 km275 km

28 km

41 km

35 km

1 km

300 kVGrid

Ana Sira300 kV

Switchyard

OnshoreConverterStation

OnshoreDC Cable

DC SubseaCable2 off

OffshoreConverter Station

AC SubseaCables3-core

On PlatformModifications

ac/dc

DC Cable – 150kV

AC Cable – 110kV

OnshoreOffshore

Åna Sira

DC Electrode Cable

EmergencyElectrode

EmergencyElectrode

Valhall Re-Development

Project Background

5,8m subsidence since 1982 (per August 2007)Design Life 25 yrs. (1982-2007)

Valhall Re-Development

VRD Project Objectives

• Legal compliance: provide air gap

• Provide opportunities for reduced lifting cost

− access to step change in O&M Philosophy

− building facilities for 40+ years design life

− add value through good use of technology (eg. IOE, PFS)

• Provide space for future tie-ins

• Retain option for liquid export post 2011

• Instal HVLER and Gas compressors onshore

Bridges and Walkways reviewLAYOUT

Tower to be Installed Prior to Bridge 9

Bridge 10 Installed Platform Crane

Bridge 9 S7000

Bridge 8 S7000

Bridge 7 S7000

Bridge 6 S7000

Bridge 5&4 to be Joined Offshore and Installed Together

Bridge (Walk) 3

x

2

3

4

1

1

6

5

2x Towers to be Installed Fly By 2008 (April ) S7000

:- Denotes Proposed Installation Order

BROWNFIELD BRIDGES AND WALKWAYS

10

Valhall Re-DevelopmentField of the Future Flagship

Flank South

Flank NorthEkofisk

Lista (Norway)

Valhall Complex

New PH

Pipelin

e from Hod

HVDC Cable

Oil Pipeline to Ekofisk

Flank South

Flank NorthEkofisk

Lista (Norway)

Valhall Complex

New PH

Pipelin

e from Hod

HVDC Cable

Oil Pipeline to Ekofisk

“A Safe, Intelligent, Low Maintenance facility Remotely Operated from shore”

• Valhall Redevelopment is a significant investment to replace subsiding facilities and extend field life by 40 years

• Facilities to remotely operated from BP Stavanger office, implementing features of the Field of the Future ”blueprint”

• Power for the full Valhall complex (78 MW) supplied from the Norwegian grid using HVDC Light technology (ABB/Nexans)

• A process/utility deck based on a skid based (Gulf of Mexico) execution methodology

• Tie-in of existing subsea pipelines to new risers on PH

• High standard Hotel for 180 personnel, based on single cabin occupancy Wellhead/Injection Platforms retained and integrated with new PH Production from DP until 2014+

• Redundant facilities/equipment rendered safe & taken out of service

11

Valhall Re-DevelopmentFacts

Valhall & Hod

Production started 1982, QP/DP/PCPWelhead Platform (WP) inst.19962 Wellhead platforms (NUI) on the field Flanks1 Wellhead platform (NUI) on HodWater Injection Platform (IP) installed 2003~500 million boe recovered 5.8 metres subsidence & old facilities BUT

– 125,000 boe/d production in 2006, – >500 million boe reserves remaining– 40 years left to go!!!

New Production & Hotel (PH) Facility

New Facility Design Life 40 yearsHotel 180 single bed cabinsOil production capacity 120 mbopdGas handling capacity 143 mmscf/dTotal liquid capacity 250 mbpd (oil & water)Design (Dry) Weight ~15,500 tne (tops. + hotel)

7 000 tne (jacket)Power from Shore 290 km DC cableOil Export Future offsh. loading/EOR

Partner Equity:BPShellAmerada HessTotal

28,128.128.115.7

12

VRD Power procurement

Consumption over time – base load plus alternative options / users (Sep ’06)

0

10

20

30

40

50

60

70

80

90

200820

0920

1020

1120

1220

1320

1420

1520

1620

1720

1820

1920

2020

2520

3020

3520

4020

4520

50

MW

Overall PFS rating Sum: Base Load at Valhall

Sum Offs.Loading (2011) + EOR (2017) Sum Offs.Loading (2011) + EOR (2011) + 4th WI

Sum 4th WI + Alt Export Pipeline + EOR (2017) Sum Offs.Loading (2011) + EOR (2011)

13

Offshore Power Generation System

GAS COMPR. TRAIN 1x100% WITH 3EA MOTOR DRIVESPH 150mmscf/d Case –configuration also valid for split PH and PF platform

IPPH

150Beds

22MW

WH

22MW24MW

WH

22MW WP

1 3/42

STEAM TURBINE DRIVEN GENERATOR

GAS TURBINE DRIVEN GENERATOR

WASTE HEAT RECOVERY UNIT

STEAM PIPE

WH

WH

1 3/421x100%

Steam

Water Return

14

Commercial analyses

• Investment cost platform with

gasturbines

• Operating cost

• Alternative-cost fuel gas (gas-

transportation cost)

• CO2-tax

• Investment cost onshore converter,cable and

offshore converter

− Lower platform weight

• Operating cost

− Synergy effect with fiber-cable (common

installation operation)

• Electrical power cost

− Taxes / CO2- trading eg.

− El.procurement strategy

Offshore Gasturbine Power from Shore

+

+

Connection between development of gas-price/el-price

15

PFS - Main onshore grid

ARENDAL

PORSGRUNN

RØD

STOKKELAND

STØLAHEIA

KJELLAND

FEDA

FROGNER

HASLE

HALDEN

RINGERIKE

FLESAKER

ÅDAL

KÅRSTØ

SAUDA

FØRRE

BLÅFALLI

LYSE

LIASTØL

SIMASAMNANGER

DALE

EVANGER

ARNA

FANA

KOLLSNES

AURLAND

SYLLING

KVILLDAL

KR.SAND

LISTA

HÅVIK

NESFLATEN

ÅSEN

TVEITEN

SONGA

Flesaker snittet

Hallingdal snittet

Hasle snittet

Sørlandssnittet

HUSNES

MAURANGER

MODALEN

SAURDAL

KraftverkTransformatorstasjonTilknytningspunkt Norned

300 kV ledning420 kV ledningDC forbindelsePlanlagte ledninger er stiplet

VALHALL

16

Lista

Lista with ELKEM’s Al-smelter and converter site

Lista Onshore Converter station

Scope – HVDC Converters

17

Lista

Scope – Submarine HVDC and FO cables

Description

� Special feature – single cable with integrated return conductor

� 292 km HVDC Cable and fiber optic cable

� Onshore section approx 1km

� Trenched and covered to 1m depth

� In some areas up to 2m depth

Main data

� P = 78 MW (at the platform)

� UDC = -150 / 0 kV

� UAC = 11 kV on offshore and300 kV onshore

Elkem

18

Onshore converter stasjon

19

20

Cooling SystemCooling System

Auxiliary Power andAuxiliary Power andControl EquipmentControl Equipment

HVACHVAC

Scope – PFS offshore module

Fabricom FEED

21

TransformerTransformer ValvesValves

Phase ReactorsPhase ReactorsScope – PFS offshore module

Fabricom FEED

Valhall Re-Development

Project Status

Deactivated 2010

Deactivated 2010

23

Benefits with Power from shore

• Simplified offshore instalation, lower offshore manning and reduced operation costs.

• Improved Safety and Working Environment.

• Emission to air offshore close to zero for enery supply to the complete Valhall field. Estimated to 300.000 ton CO2/year and 250 ton NOx/year. (Compared with a offshore CCPP with highest efficiency). 400 – 500.000 ton with todays technical solution.)

• Fever offshore lifts give HSE benefits

• Less boats, Less helicopters

• Technical adventages regarding direct on line start of large motors and electrical system fault level in the offshore grid.

• Higher availability for supply of full power to cover the process and utility requirements.

Back up slides

25

Reliability / Availability

• Use of HVDC mass impregnated cable. No electrical fault of Nexans DC

submarine cables up today. 30 years operation experience. Result: Not

included in RAM analyses

• Studied Statnett,s statistics for supply to Lista for the last 14 year.Very

reliable supply. Full capacity for both Elkem and BP from two

indemendent 300KV lines. Result: Not included in RAM analyses

• Converter stations:

1. Dublicated all aux system on electrical, control and HVAC

26

Reliability / Availability continue

2. Ordered ”insurance spare” for all equipment / components with long lead time. This include both converter transformers, phase reactor, part of filter banks eg. In total about 40MillNOK

3. Planned inspection / maintenance work will be completed during planned production shut downs, every 3.year. Evaluating use of more condition monitoring to reduse the need for PM / Inspection

4. Support / maintenance contract will be set up with ABB for quick support when needed

5. Training will be given to BP and Elkem personell during tests at ABB, Lista, modul fab yard and offshore

27

Reliability / Availability continue

• Three BP technicians will be part of the VRD project team through

engineering, fabrication, commissioning of the PFS system

• 6 km spare cable and repair joints ordered

• Details around cable repair setup and support contract will be further

discussed and agreed with Nexans in due time before start up