The Design and Installation of The Buchan Field Subsea Equipment
The Design and Installation of The Buchan Field Subsea Equipment
The Design and Installation of The Buchan Field Subsea Equipment
OFFSHORE
PETROLEUM
conFEREnCE
&EHHIBITIOn
EUR 174
THE DESIGN AND INSTALLATION OF THE BUCHAN FIELD
SUBSEA EQUIPMENT
by
ABSTRACT
This paper covers the design and installation of
the Buohan Field subsea equipment inoluding:
template, trees and completions, wireline riser
and BOP staok, subsea manifold, flowlines and
umbilioals, produotion riser and oontrol system.
A brief desoription of the rig modifioations to
enable it to handle the produotion riser is also
inoluded.
INTRODUCTION
275
276
(a)
(b)
(c)
(d)
(e)
277
278
ACKNOWLEDGEMENTS
The author wishes to acknowledge BP Trading Limited,
BP Petroleum Development Limited and their Partners
in the Buchan Development, namely St. Joe Petroleum
Corporation, CanDel Petroleum Limited, Natomas
International, Gas and Oil Acreage Limited,
Charterhall Oil Limited, Lochiel Exploration (UK)
Limited, CCP North Sea Associates and City Petroleum
Corporation for permission to produce this paper.
CONTROL SYSTEM
All the subsea equipment is controlled hydraulically
via 4 hydraulic umbilicals deployed from the
production platforms. Two 65 function umbilicals
are run to twin control pods mounted on the base
to control the trees and downhole safety valves
and two 62 function umbilicals control the manifold
operation through pods mounted on the upper manifold
frame (see Figure 5). Total duplication of all key
subsea functions is provided between rig and control
pods.
REFERENCES
1.
279
TABLE 1
The production riser bundle
Operating Pressure
MFa
psi
Number
Nominal
Size Uns)
5000
34
225
1.5
7500
52
3250
22
12
225
1.5
Risers
Produotion
Gas Lift
Export
FUTURE
NORTHERN
SATELLITE
WELL
FLOATING
PRODUCTION
PLATFORM
CALM
BUOY
SUBSEA
TEMPLATE
5 WELLS
SOUTHERN
SATELLITE
WELLS
Fig. 1 - Layout of the Buchan Field.
II
SPIDER SUPPORTPRODUCTION RISERS
UMBILICALS
SUB-SEA
CENTRAL EXPORT
RISER
CHRISTMAS~ I~
TREES
MANIFOLD
SAT WELL
FLOWLINES
SEA BED
TEMPLATE-~
CONTROL
UMBILICALS
PRODUCTION
STRING
(4 11 NOM.)
UPPER
TREE
'I J"
........ ,
I
I
LOWER
TREE
1
01 L PRODUCTION
PROPOSED
GAS
INJECTION
MANIFOLD
CONTROL
PODS
RISER
CONNECTORS
MANIFOLD
UPPER
FRAME
I4-I--I-------E XPO RT
LINE
MANIFOLD
LOWER
FRAME
TREE
CONTROL
PODS
~-MANIFOLD
BASE
GUIDE FUNNELS
~-EXPORT
RISER
GAS LIFT
RISER
PRODUCTION
RISER
SERVICE
RISER
Fig. 6. - Cross-section of the production riser.
TO TENSIONERS
12"EXPORT RISER
'GUIDE FUNNELS
UNIVERSAL JOINT
MANIFOLD
TEMPLATE