Rosneft Subsidiary Acquires Interest in ExxonMobil Gulf of Mexico Exploration Blocks

Neftegaz America Shelf LP (Neftegaz), an indirect independent subsidiary
of Rosneft, acquires 30 percent interest in 20 deepwater exploration
blocks in the Gulf of Mexico held by ExxonMobil,
under an agreement signed by the two companies.

The 20 blocks have a total area of approximately 111,600 acres (450
square kilometers) in water depths ranging between 2,100 and 6,800 feet
(640 and 2,070 meters). Seventeen are located in the Western Gulf of
Mexico and three are in the Central Gulf of Mexico.

ExxonMobil retains 70 percent interest in the blocks and remains
operator. Analysis of seismic data is under way. There is currently no
production on the blocks.

Rosneft and ExxonMobil continue to implement the Strategic Cooperation
Agreement signed in 2011, under which the companies and their
subsidiaries plan to undertake joint exploration and development of
hydrocarbon resources in Russia and other countries and to share
technology and expertise. Under subsequent agreements between Neftegaz
and ExxonMobil, Rosneft′s subsidiary gained the option to acquire
interest in 20 blocks of its choosing from among ExxonMobil′s Gulf of
Mexico exploration portfolio. ?The latest agreement represents the
exercise of that option.

The agreement was signed by Igor I. Sechin, president of Rosneft, and
Stephen M. Greenlee, president of ExxonMobil Exploration Company.

'ExxonMobil has a long history of safe oil and gas exploration in the
Gulf of Mexico using state-of-the-art safety and environmental
protection systems,? said Greenlee. 'We look forward to working with
Rosneft and its affiliates to explore these blocks using our
leading-edge exploration and development technology and deepwater
execution expertise.?

Sechin said, 'This agreement provides Rosneft and its affiliates with
access to one of the world′s most prolific basins. We believe joint
efforts of our companies will ensure the most efficient development of
these blocks, with application of the latest technologies and adhering
to high environmental standards. Moreover, experience and knowledge
acquired in the process may potentially be used when developing
deepwater blocks in Russia, including in the Tuapse Trough in the Black
Sea as envisaged under the Strategic Cooperation Agreement.?

ExxonMobil and Rosneft continue to implement a program of staff
exchanges for technical and management employees to help strengthen the
working relationships between the companies and provide valuable career
development opportunities for employees of both companies.

The 20 blocks are:

Western Gulf of Mexico ? Alaminos Canyon 569, 612, 613, 655, 656, 657,
698, 699, 700 and 701; East Breaks 429, 471, 472, 473 and 515; Keathley
Canyon 529 and 573.

Central Gulf of Mexico ? Walker Ridge 629, 673 and 717.

CAUTIONARY NOTE: Statements of future events and conditions in
this release are forward-looking statements. Actual future results,
including business plans and potential benefits realized by the parties,
could differ materially depending on the outcome of future negotiations;
the actions of governmental authorities and regulators, including legal
and legislative uncertainties; the outcome of exploration programs;
changes in prices and other market and economic factors affecting the
oil and gas industries; future technological developments; other
technical and operating factors; actions of competitors; and other
factors discussed under the heading 'Factors Affecting Future Results?
on the Investors page of ExxonMobil′s website at exxonmobil.com.
Additional information about Rosneft is available on its website at www.rosneft.com.
The terms ExxonMobil and Rosneft can refer to either the parent
corporations, or their subsidiaries/affiliates, or both.

About ExxonMobil

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company, uses technology and innovation to help meet the world′s growing
energy needs. ExxonMobil holds an industry-leading inventory of
resources, is the largest refiner and marketer of petroleum products,
and its chemical company is one of the largest in the world.

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