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Serrano and Oregano

Name

Serrano / Oregano

Operator

Shell

Location

Gulf of Mexico

Water depth

3,400ft

Production facilities

Auger tension leg platform

Water depth

2,400ft

Recovery

50 million boe

Peak daily production

150Mmcfd and 20,000bpd

Development costs

$250m, excluding lease costs

Serrano

Location

Garden Banks Block 516 and 472

Water depth

3,400ft of water

The discovery well

GB 516 in 1996 using the Ocean Worker.

GB 472 in 1999 using the Transocean Marianas

220 miles southwest of New Orleans

The target reserves

12000ft and 18000ft subsea

The average net pay

80ft-110ft

Peak production rates

150Mmcfd by 2003

Oregano

Total development

$120m, excluding lease costs

Oreggano

Location

Garden Banks Block 558 and 559

225 miles southwest of New Orleans

Water depth

3,400ft

Discovery well

GB 559 in 1999

Rig

Noble Paul Romano

Target reserves

K sands

Depth

19,000ft subsea

API gravity

35°-37°

Sulphur content

1.08%.

Recovery

50 million barrels of oil equivalent

Development costs

$130m

Subsea system

2 wells connected to a subsea flowline sled

Tieback

Single 6in x 10in pipe-in-pipe insulated flowline

Bayou Pipe Coaters

Flowlines

Oil States

Flowlines

Seacat

Umbilicals

Oceaneering

Subsea Pig Launcher

FMC

Subsea Wellhead & Completion Equipment

W.S. Nelson/Linder & Associates

Topsides

Bay Offshore

Topsides

Name

Ocean Worker

Rig Type

Semisubmersible

Rig Design

Enhanced Pacesetter 9500 Series

Year Built

1982

Yard

Hitachi Zosen, Osaka, Japan

Class

A1M CSDU

Water Depth

3,500ft

Drilling Depth

25,000ft

Quarters

86 + 6 bed hospital

Helideck

83inch diameter octagonal

Drilling Draft

65ft

Variable Deckload – Operating

3,953 LT

Variable Deckload – Transit

1,968 LT

Transocean Marianas

Rig Type

High-Specification Semisubmersibles

Design

Earl & Wright Sedco 700 Series Enhanced

Built

Mitsubishi (original hull) FELS (Conversion)

Singapore; AMFELS (Brownsville, TX)

Year Built

1998

Accommodation

150 berths

Max Drill Depth

25,000ft

Water Depth

7,000ft

Length

264ft

Breadth

197ft

Operating Draft

81ft

Major contractors participating in the development are

Diamond Offshore

Drilling and completions

J. Ray McDermott

Flowline installation

Duco

Umbilicals

Rigs

Depth

122ft
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