Atlantis begins production

BP PLC
18 December 2007


press release

December 18, 2007


                       BP COMMISSIONS ATLANTIS PLATFORM,

                         BEGINS OIL AND GAS PRODUCTION


HOUSTON - BP today announced that it has completed commissioning of the Atlantis
semi-submersible platform in the deepwater Gulf of Mexico and commenced the
export of oil and gas from the deepest moored floating oil and gas production
facility in the world.

'The water depths and reservoir structure make Atlantis among the most
technologically challenging developments undertaken by BP,' said Andy Inglis,
BP's Chief Executive of Exploration and Production. 'Start-up is an important
milestone as we grow production from our strong upstream portfolio in the
deepwater Gulf of Mexico and elsewhere in the world.'

Production commenced with the commissioning of wells and facilities in October
2007. With gas facilities and export pipelines now fully commissioned, gas sales
have started and oil volumes are increasing. Additional wells will continue to
be brought on stream, and the facility is expected to reach plateau production
by end of calendar year 2008.

BP began production operations in the deepwater Gulf of Mexico in 1995. Since
then, the company has participated in a series of major projects, investing more
than $14 billion.

'The investment we are making to deliver world class projects like Atlantis in
the deepwater Gulf of Mexico is making a major contribution to US energy supply
and US energy security,' said Bob Malone, Chairman and President of BP America.

BP is operator of Atlantis with 56 percent ownership. BHP Billiton has a 44 per
cent working interest.

Note to editors:

The Atlantis platform is located more than 150 miles south of New Orleans, LA
in Green Canyon at a water depth of 7,070 feet (2,150 meters).

Atlantis employs an integrated concept of a Production Quarters (PQ) semi-
submersible platform supported by a separate dedicated semi-submersible mobile
offshore drilling unit (MODU).

Oil and gas will be transported to existing shelf and onshore interconnections
via the Caesar oil and Cleopatra gas pipeline systems, which are part of the
Mardi Gras Transportation System, the highest capacity deepwater pipeline
system ever built. BP has a 65 percent ownership interest.

Major BP developments in the deepwater Gulf of Mexico include: Marlin, 2000;
Horn Mountain, 2002; Na Kika, 2003; Holstein, 2004; Mad Dog, 2005 and Atlantis,
2007. Thunder Horse, with a nameplate capacity of 250,000 barrels of oil and
200 million cubic feet of natural gas per day, will begin production in
late 2008.

Since 1995, total daily deepwater Gulf of Mexico oil production has increased
from 151,000 barrels of oil per day (about 2.3 per cent of US oil production)
to 936,000 barrels per day (about 18 percent of US oil production.)

A photo of the Atlantis production facility is available.

For additional information:


BP, London [phone]

BP, Houston

Ronnie Chappell 281 366 5174 or 281 236 3529

Neil Chapman 281 366 7115 or 713 503 4583




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