The Hydrographic Society in Scotland

Hydrofest 2016

DEVELOPMENT PROJECTS – A CASE

HISTORY

Ian Douglas

Head, Offshore Surveys,

Shell Projects & Technology Europe

GOLDENEYE

PLATFORM

ST. FERGUS

GOLDENEYE FACTS

• Gas Condensate Field

• Located in Outer Moray Firth, only 100km NE of St Fergus Gas Terminals

• Low safety risks due to normally unmanned operations offshore

• Total lifetime production expected to be in excess of 500 Billion scf Gas and 17 Million barrels Condensate over a 10 Year period

• Greatest water depth (120 metres) in which a Jack-Up rig will be used for production well drilling

THE PROJECT: GOLDENEYE

Geomatics Foundation

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TIMELINE

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10 Year 11

Exploration seismic Acquisition

Interpretation

Exploration Drilling

Appraisal

Final Investment Decision

Concept Select

Route Survey & Site Investigation

Front End & Detailed Design

Offshore Construction

Development Drilling

Production Start Up

CONCEPT SELECT

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• Distribution of geology & reservoir characteristics

• Geographic restrictions (legal, environmental, physical)

• Proximity to infrastructure

• Location of markets

• Technology

• Local Content

• Prevailing Metocean Conditions

CONCEPT SELECT

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ROUTE SURVEY

Pipelay – Shore Pull – Near shore /

Offshore Operations

Trenching

Backfilling

Platform Installation

Tie-In & Pre-Commissioning Works

Rock dumping – Crossings and Pipeline

Protection

Drilling Phase

8

CONSTRUCTION OPERATIONS

PRE-INSTALLATION SURVEY

Ensures route / site is free of

obstructions

Side Scan Sonar and MBES

ROV centre line / site visual

survey

Digital Terrain Model

Route Topography Analysis

Array visibility Analysis

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ROV visual surveys

Semi submersible pipelay barge

Deep & shallow water capability with dedicated

pipelay ramp

Dual lay and piggyback lay capabilities

Large diameter pipelay capability

Lay rate up to 7km/day

Semi automatic welding system

Self propelled vessel

Certified with NMD, HSE Letter of Compliance

12 point mooring system & thruster assistance

Main Features

PIPE LAYBARGE - CASTORO SEI

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SURVEY SUPPORT FOR CONSTRUCTION OPS

Pre-Award Survey Input

Pre-Construction Survey Activities

Landfall Preparation & Plant Construction

Pipelay Barge Navigation

Tug Management

Shore Pull

Pipeline crossing

Pipe lay down

Trenching & Backfill for service line

Heavy lift vessel positioning

Acoustic positioning USBL or LBL of

structures

EDM (Total Station) positioning of

structures 11

SHORE PULL OF PIPELINE

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11-B 12-B 1-B 2-B

3-B

5-B

6-B

7-B

9-B

10-B

4-B

PIPELINE START-UP

ST. FERGUS

KP -0.2

WATER DEPTH = M.L.W.S.

ST. F

ER

GU

S

PROPOSED

WINCH

SITE

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SET UP AND LAY AWAY

ST. F

ER

GU

S

WATER DEPTH 79m

9

CROSSING OF

28” BRITANNIA

Approx. KP 17.16

WATER DEPTH 77m

8

WATER DEPTH 79m

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CROSSING OF

30” MILLER

Approx. KP 14.63

WATER DEPTH 89m

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CROSSING OF

32” FRIGG/1

Approx. KP 13.60

WATER DEPTH 84m

5

CROSSING OF

32” FRIGG/2

Approx. KP 13.42

WATER DEPTH 84m

4

CROSSING OF

36” FLAGS BRENT

Approx. KP 8.72

WATER DEPTH 59m

3

WATER DEPTH 58m

2

WATER DEPTH 29m

1

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PIPELINE ROUTING – NEAR SHORE SECTION

WELDING OF PIPE FIELD JOINTS

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PROPOSED

20” SPOOLPIECE

PROPOSED

4” SPOOLPIECE

4” SERVICE LINE

LAYDOWN 20” EXPORT LINE

LAYDOWN

GOLDENEYE

PLATFORM

(Not Installed)

WATER DEPTH = 120m

Geomatics Foundation

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PLATFORM APPROACH

TRENCHING

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Geomatics Foundation

BACKFILL

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PLATFORM INSTALLATION

PLATFORM INSTALLATION

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PLATFORM INSTALLATION

PROPOSED

20” SPOOLPIECE

PROPOSED

4” SPOOLPIECE

INSTALL 20” + 4”

SPOOL, FLANGE

PROTECTOR AND

SSIV

20” + 4”

HYDROTEST

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PLATFORM TIE-IN WORKS

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ROCK DUMPING

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Geomatics Foundation

AS-BUILT RECORDS

Q + A

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