ExxonMobil Announces Drilling of World-Record Well

    Sakhalin-1 Project Drills Well Exceeding Seven Miles in Length

    IRVING, TEXAS, April 24 /CNW/ - Exxon Mobil Corporation (NYSE:  XOM)
announced today that its subsidiary, Exxon Neftegas Limited (ENL), has
completed drilling of the Z-11 well, the longest measured depth extended-reach
drilling (ERD) well in the world. Located on Sakhalin Island offshore Eastern
Russia, the record-setting Z-11 achieved a total measured depth of 37,016 feet
(11,282 meters) or over seven miles.

    The multiphase Sakhalin-1 Project includes the Chayvo field which is
located 5 to 7 miles (8 to 11 kilometers) offshore. The Z-11 was drilled to
the Chayvo reservoir from the Yastreb rig, the world's largest land-based
drilling rig. Overall, the Chayvo field reached its peak production rate of
250,000 barrels (34,000 metric tons) per day in February 2007 after an
on-schedule startup in October 2005. The Z-11 is the 17th ERD producing well
to be completed as part of the Sakhalin-1 Project. It was drilled in 61 days,
more than 15 days ahead of schedule and below expected cost with no safety or
environmental incidents.

    Since the first Sakhalin-1 well was drilled in 2003, the time required to
drill these world-class wells has been reduced by more than fifty percent.
When compared to industry benchmarks, Sakhalin-1 wells are the world's fastest
drilled ERD wells.

    "ExxonMobil, through the operatorship of Exxon Neftegas Limited, is
pleased that the Sakhalin-1 Consortium achieved this record-setting
milestone," said Neil Duffin, president of ExxonMobil Development Company.
"Our consortium is committed to the continuing development of the Sakhalin-1
Project which will require significant investment, planning, execution,
operating expertise and the employment of leading-edge technology."

    The project team applied ExxonMobil proprietary technologies, including
Integrated Hole Quality (IHQ) technology and the Fast Drill Process, to
deliver the Z-11 well.

    "The physics based modeling and experimental validations of our IHQ
technology allowed us to successfully design and drill the Z-11," said Steve
Cassiani, president of ExxonMobil Upstream Research Company. "With this
technology we were able to take into account a broad range of interdependent
design variables including rock strengths, stresses, and wellbore hydraulics
to successfully drill this well."

    Used in conjunction with IHQ technology was an optimization process
called Fast Drill, which is a unique energy-based analysis tool and work
process that allows rig site and drilling engineering personnel to maximize
performance in every foot of hole drilled.

    The Sakhalin-1 Project will bring significant economic benefits to Russia
including over US$50 billion in direct revenues to the Russian state, major
infrastructure improvements, technology transfer and the supply of natural gas
to customers in the Khabarovsk Krai in the Russian Far East. Notably, over 80
percent of the Sakhalin-1 Project drilling rig operators are Russian nationals
and project contract awards to Russian companies have reached approximately
US$3.8 billion.

    Exxon Neftegas Limited (30 percent interest) is operator for the project,
which includes the Japanese company Sakhalin Oil and Gas Development Co. Ltd.,
(30 percent); affiliates of Rosneft, the Russian state-owned oil company,
RN-Astra (8.5 percent), Sakhalinmorneftegas-Shelf (11.5 percent); and the
Indian state-owned oil company ONGC Videsh Ltd. (20 percent).

    CAUTIONARY STATEMENT: Estimates, expectations, and business plans in this
release are forward-looking statements. Actual future results, including
production rates; cost efficiencies; project plans, schedules, costs, and
results; and commercial arrangements could differ materially due to changes in
long-term oil and gas price levels or other market conditions affecting the
oil and gas industry; political or regulatory developments; reservoir
performance; technical or operating factors; the outcome of negotiations; and
other factors discussed under the heading "Factors Affecting Future Results"
included in Item 1A of ExxonMobil's most recent Form 10-K and posted on our
website (www.exxonmobil.com).

For further information:

For further information: ExxonMobil Jeanne Miller, 713-656-4376

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