Atlantis-2 Gulf of Mexico
Broken Hill Proprietary Co Ld
16 October 2000
Atlantis-2 Gulf of Mexico
Number 94/00
ATLANTIS-2 SIDETRACK CONFIRMS RANGE OF GULF OF MEXICO DEEPWATER DISCOVERY
The Broken Hill Proprietary Company Ltd (BHP) today announced results from the
sidetrack well drilled from its Atlantis-2 appraisal wellbore in the Gulf of
Mexico. The sidetrack confirms a lateral extension of the known range of the
Atlantis hydrocarbon accumulation of up to 1.6 kilometres (one mile) from the
original wellbore, and also confirms the continuity and quality of the Miocene
reservoir sands. This data gives further confirmation of the material nature
of this multi-hundred million barrel oilfield.
The downdip sidetrack, drilled as a deviated hole to the south west of the
Atlantis-2 well, was designed to gather data on both the lateral extent and
reservoir properties of the Atlantis oil accumulation. The sidetrack
successfully achieved its objectives and encountered oil in multiple Miocene
sands with a net pay in excess of 92 metres (300 feet true vertical
thickness). It was drilled to a total depth of 5885 metres (19,230 feet).
Information collected from the Atlantis-2 sidetrack well and earlier drilling
will be used to determine the extent and nature of the hydrocarbon
accumulation, the resource size as well as possible future appraisal
requirements.
Atlantis-2, whose results were announced on August 28, 2000, is located in the
Gulf of Mexico Green Canyon Block 743, along the ultra-deep Atwater Foldbelt
fairway. It encountered oil-bearing sands with total net pay in excess of 153
metres (500 feet). The well was drilled to a total depth of 5690 metres
(18,600 feet) in water depths of 2042 metres (6,675 feet). The BHP-operated
C.R. Luigs drilling vessel was used to drill the Atlantis-2 appraisal well and
sidetrack.
The discovery well Atlantis-1 was drilled in 1998 in Green Canyon Block 699,
approximately five kilometres (three miles) north east of Atlantis-2. It also
encountered oil-bearing sands.
BHP has a 44 per cent working interest in the Atlantis discovery. BP is the
operator and has a 56 per cent interest.
BHP will be progressing further appraisal and development planning studies
intended to secure sanction in 2001 for the development of one or another of
its discoveries in the Atwater Foldbelt.
Atlantis is one of three BHP/BP discoveries in the Atwater Foldbelt: Neptune
(BHP 42.5 per cent), located 26 kilometres (16 miles) north east of Atlantis,
was discovered in 1995 and Mad Dog (BHP 23.9 per cent), located a similar
distance to the south west, was discovered in 1998.
In addition, the Mad Dog-3 appraisal well is currently drilling, and an
exploration well will commence in the near future on the Chinook prospect
located in the Walker Ridge extension of the Atwater Foldbelt, some 70
kilometres (45 miles) to the south west of Mad Dog. Other recent activities
announced by BHP in the Gulf of Mexico include an acquisition of 4.95 per cent
of the Genesis producing oilfield and a joint venture agreement with Total
Exploration Production USA, Inc. on 21 leases in the Walker Ridge.
Contact:
MEDIA RELATIONS: INVESTOR RELATIONS:
International--
Dr Malcolm Garratt Dr Robert Porter
Group Manager of External Affairs Vice President of Investor Relations
BHP Petroleum BHP
Phone: 61 3 9652 6872 Phone: 61 3 9652 6433
North America--
Patrick Cassidy, Director of Public Affairs
BHP Petroleum (Americas) Inc.
Phone: 1 713 961 8517
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