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West Seno, Makassar Strait

Operator

Unocal

Water depths

2,400ft to 3,400ft

Reservoir sands

Miocene

Structure

Four-way dipping north-south oriented faulted anticline

Porosity

Up to 30%

Permeability

10mD to 1,000mD

Discovery

1998

Wells

West Seno 2 (205ft pay); West Seno 1 (270ft oil, 103ft gas); West Seno 5 (60ft oil, 141ft gas); West Seno 3 (24ft oil, 39ft gas); West Seno 7 (163ft oil); West Seno 8 (127ft oil, 97ft gas)

Production phase

August 2003

Production rates

40,000b/d

Export

12in diameter pipelines to Santan terminal, 40 miles away

Pipelay vessel

Lorelay

Total pipeline length

59.5km

<b>TLP A Field Development</b>

Installed

February 2003

Wells

28 wells

Deck weight

1,700t

Hull

4,800t

Tendons

3,200ft

Segments

18ft x 165ft

Diameter

26in

Wall thickness

1.036in

Tender assist vessel

West Alliance

<b>TLP B Field Development</b>

Installed

2005

Location

3 miles from TLP A

Wells

20

Well slots

24

Completion

2006

<b>FPU</b>

Location

500m from TLP A

Mooring

Spread-moored barge

Water depth

3,200ft

Processing capacity

60,000b/d oil, 150million ft&#179;/d gas, 40,000b/d water

Reservoir support

50,000ft&#179;/d gas

Hull weight

6,500t

Topsides weight

1,900t

Total weight

8,400t
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