April 2004 Matterhorn

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metteur07/05/2004

The Matterhorn projectPresentation at the Marine Technology Society Luncheon April 22, 2004


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C.Van der Linden

Matterhorn Project

Agenda

General Project Overview

Development architecture

Key challenges

Execution highlights

Conclusions


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Matterhorn Project

General overview

High

Island

Brazos

Galveston

MU

West

Cameron

East

Cam.Verm.

SMI EugeneIsland Shoal South

Timbalier

GI

WestDelta

East Breaks

Alaminos

Canyon KeathleyCanyon

Garden

Banks Green Canyon

Walker

Ridge

EW

MO

200m

Texas

Louisiana

SP

MississippiCanyon

Main

Pass

VK

BS

Lund

1000m

2000m

3000m

Atwater

Ship

Aconcagua

Virgo

Matterhorn

New Orleans

Total Properties

Exploration

Production

0 50 10025

Miles

VKHouston


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Matterhorn Project

Key Time line

Discovery early 1999: 2800 ft water-depth, Multi-layered reservoir

Decision to develop: July 2001

Start development drilling: December 2001

Installation: August 2003

Start well completion: September 2003

First oil: November 2003


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Matterhorn Project

The platform : a SeaStar TLP

Surface piercing structure (TLP or SPAR) w/dry tree chosen due to reservoir complexity

(Multi-levels).

Atlantia chosen after design competition withan EPCI Lump Sum Contract.

Hull : draft 104, height 125, dia. 84 weight5,500 T.

9 slots for production risers and dry trees(spacing 10x10)

Mooring : 6 x 32tendons, 6 x 96 piles(tension 2,800 klbs per tendon).

1,000 HP W/O rig (separate contract). 10 Gas and 8 Oil Export SCRs, WI flexible Provisions for future subsea tie-backs ABS Class FOI


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Matterhorn Project

Topsides general Overview

140x140, 3 decks

11,000kips dry, 12,600 kips operating

33,000 bopd, 55 MMscfd, 20,000bwpd

100 MMscfd gas drying, WI 30,000 bwpd

2 Cranes: 45 t and 75t

2x 4.5 MW turbines (2x50%);1.2 MW e-gen

Gas engine driven recip. compressors

3 survival capsules, 50 pax eachLQ: 22 pax permanent, 78 temporary

Blast &fire wall

Helideck: 56x56 for Bell 412, Sik 76


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Matterhorn Project

Risers and pipelines

Export by two 16 miles

pipelines (8 and 10), 8owned by Chevron.Hot-tap tie-in points totrunklines


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Matterhorn Project

SCR Overview (first Total SCRs)

MWL

10" GAS EXPORT (SCR)10.75" O.D x 0.625" W.T PIPE

HANG -OFF ANGLE15

WD @ TLP = 2811 ft.

1300'STRAKE

LENGTH

MUDLINE @ CL TLP

HORIZONTAL DISTANCE TO TDP (MEAN)

MUDLINE EL.(-) 2706 ft.

SCR TOUCH DOWN (MEAN)

3 SEA BED SLOPE

1955'

Lcate

nary

=35

08

ft.

1499'HORIZONTAL DISTANCE TO TDP (NEAR)

2464'

HORIZONTAL DISTANCE TO TDP (FAR)

Lcate

nary

=3

248

ft.

Lcatena

ry=382

3ft.

SCR TOUCH DOWN (NEAR)SCR TOUCH DOWN (FAR)

NOT TO SCALE

1300FT.HELICALSTRAKES

SCALE: NONE16D X 0.25DHELICAL STRAKE

MATTERHORN


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Matterhorn Project

Development architecture screening process

PHASE 1: SCREENING STUDYDRILLING/COMPLETION COST

PRE-SIZING AND COST OF 12 CONCEPTS(Summer 1999)

PHASE II: DEVELOPMENT OPTIONS DRY TREE OR SUBSEA?CONCEPTS SELECTION

PHASE III: TOPSIDES DESIGNPROCESS DESIGN LAYOUT DRAWINGS(Nov 1999 April 2000)

PHASE IV: CONCEPT COMPETITION FINAL PROPOSALS / SELECT ONE

CONCEPT (March 2000 to June 2001)

PHASE V: PROJECT July 2001 - November 2003 (FIRST OIL)


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Matterhorn Projectoncepts Considered in Phase I (Screening Study)

Dry Tree Atlantia Sea Star

Modec Moses

ABB TLP and Mini-TLP

Spars Classic Spar and Truss Spar

Kvaerner DDF

Technip TPG 3300

Mustang Compliant Tower

Hutton TLP

Sub-Sea

Atlantia Sea Star Cal Dive EGB Semi-Submersible

Oceaneering Converted Semi-Submersible

Intec Remote Subsea ( Taylor MC 20 Platform)


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Matterhorn Projecthe retained concepts


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Matterhorn Project

Key Project Technical Challenges

Drilling: Deviated wells with shallow kick-off and shallow waterflow

Biggest mono-hull TLP and first with dry risers

Met-Ocean: consideration of Cold core current profile

Production risers with Surface Xmas trees: Keel joint development

Reeled SCRs

M tt h P j t


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Matterhorn Project

Challenge: biggest mono-hull TLP + dry trees

M tt h P j t


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Matterhorn Project

Challenges: Drilling of High Angle wells

A1

A2

A3 A4

A5A6

A7

A9

MC199#1

MC243#1

MC243#2

MC243#3

Conoco #1

2000'

4000'

6000'

7 Dry Tree

1 Wet Tree (A6)

A1

A2

A3

A4

A5

A7

A9

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

11,000

0 1,000 2,000 3,000 4,000 5,000 6,000 7,000

7 Dry Tree

1 Wet Tree (A6)

A6

Matterhorn Project


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Matterhorn Project

Challenges: Consideration of Cold Core Current (CCE)

FUTURESCR

10"G

ASEXPORT

FUTURESCR

F U T U R E

S C R

6" WATER

INJECTION

SCR

UMBILIC

ALS

FUTURE

SCR

8"OILE

XPORT

#2

#3#4

#5 #6 #7#8

#1

FUTURESCR

ORIGINAL RISER ARRANGEMENT

QTY - 1 OIL EXPORT 8" SCRQTY - 1 GAS EXPORT 10" SCRQTY - 1 WATER INJECTION 6" SCRQTY - 1 FUTURE WATER INJECTION 6" SCRQTY - 4 FUTURE PRODUCTION 6" SCRs

FUTURESCR

10"G

ASEXPORTFUTURE

SCRFUTURE

FLEXIBLE

RISER

FUTURE

FLEXIBLE

RISER

8"OILE

XPORT

A-6WATER INJE

CTIONRISER

FUTUREWATERINJECTIONRISER

A-6 WATER INJECTION UMBILICAL

FUTUREWATER INJECTION UMBILICAL

FUTUREUM

BILICAL

F U T U R E U M B I L I C A L

#1

#2

#3#4

#5

#6#7

#8

CURRENT RISER ARRANGEMENT

QTY - 1 OIL EXPORT 8" SCRQTY - 1 GAS EXPORT 10" SCRQTY - 1 WATER INJECTION 6" SCR / FLEXIBLEQTY - 2 FUTURE FLEXIBLESQTY - 1 FUTURE WATER INJECTION SCRQTY - 2 FUTURE PRODUCTION SCRs

Fatigue:

9design life at 10 x recorded event9Need fairings to 1500

Platform offset

Riser/tendon interference

Before

After

0

500

1000

1500

2000

2500

30000 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Non-Dimensionalised Current Speed (1=max)

WaterDepth

(ft)

100yr Loop

Cold-Core Eddy

Matterhorn Project


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Matterhorn Project

Challenges: Production riser keel joint

Matterhorn Project


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Matterhorn Project

Project Highlights

Drilling

Construction

Installation

Production risers

SCRs

Matterhorn Project


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Matterhorn Project

Drilling: pre-drilling of 7 wells, seabed spacing 25ft

ENSCO 7500

Tropical Storm Hanna

Matterhorn Project


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Matterhorn Project

Hull construction by Keppel/Fels - Singapore

Matterhorn Project


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Topsides Construction by Gulf Marine Fabricators

Matterhorn Project


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Tendons fabrication by Kiewitt Offshore

Tendon main body sections with

fairings

Bottom connector

Matterhorn Project


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Hull transport on the Tai an Kou

Matterhorn Project


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HULL Load-on Transportship

Matterhorn Project


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Installation by HMC Hermod

Installed piles in March 03. Tendon Installation started on June 3, 03. Went on Stand by during tendon installation on June 10

due to high current (Eddie Current >1.5 knts) and two

tropical storms. Resumed work on July 16 after 34 days stand-by Deck was set on August 3.

Platform was habitable on Aug 5.

Matterhorn Project


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Eddy Currents

Matterhorn Project


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Pile and tendon Installation

Tendon spacer

Buoyancy cans

Matterhorn ProjectHull Installation


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Hull Installation

Matterhorn Project


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Topsides lift: 5800 t

Matterhorn Project


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Production risers

Keel joint centraliser

PRTs

Well bay

Matterhorn Project


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Pipelines & sub sea

Multi-contract &PO approach Pipelines were installed in April

May 2003 by the reel-ship DeepBlue (Technip) before platforminstallation and picked up by thecrane barge Hermod.

Commissioning by Stolt Subsea injection well completion

and connection to be performed in

May-June 2004.

Matterhorn Project

SCR R l


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SCR Results

Installed Within Tolerance

Both Lines Have BeenPigged

CP Inspection Results OK

Touchdown Point Trenching

As Predicted

Matterhorn Project

C l i


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Conclusions

3.2 Million manhours

LTIF

Documents

April 2004 Matterhorn