C.A.T. oil signs major contract with Rosneft

• 100% increase in hydraulic fracturing jobs on Yugansk fields in
2008 • Exposure to Russia’s largest oil and gas producer
significantly expanded

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Vienna (euro adhoc) - November 23, 2007 - C.A.T. oil AG (O2C, ISIN:
AT0000A00Y78), one of the leading providers of oil and gasfield
services in Russia and Kazakhstan, signed a major contract through
its operating subsidiaries CATKoneft and CATOBNEFT with Russia´s
largest oil producer Rosneft. The services will be provided for
Rosneft´s core production subsidiary Yuganskneftegaz on the
challenging Yugansk oil and gas fields. The contract comprises
altogether 385 hydraulic fracturing jobs, out of a total of 1,275
tendered by Yuganskneftegaz for the season 2008, thus capturing a 30%
market share for this strategically important client.

In March 2007, C.A.T. oil already concluded a comprehensive
three-year-contract with Rosneft for 567 hydraulic fracturing jobs to
be accomplished until 2009. C.A.T. oil more than doubles its exposure
to Rosneft´s large-size fracturing jobs in 2008 compared to 192 jobs
to be accomplished for the oil producer in 2007.

With proven oil and gas reserves of 20.1 billion barrels and a
production of 1.7 million barrels a day, Rosneft is the largest oil
producer in Russia. C.A.T. oil´s operating subsidiary CATKoneft is
very familiar with the customer´s fields in Yugansk. It has been
operating in this area since 2002 and since then has performed more
than 580 fracturing jobs for Yuganskneftegaz.

Due to the specific geological structure of Yugansk fields,
fracturing there ismore sophisticated compared to the rest of Russia
and thus more profitable for service providers. The Yugansk area´s
fracturing job size on average ranges from 70 to 115 tons of proppant
used while a typical fracturing job in Russia only requires 40 to 50
tons.

Leonid Mirzoyan, Chief Corporate Finance Officer of C.A.T. oil AG,
states: "We are very pleased with the Yuganskneftegaz tender results,
which witness C.A.T. oil´s perfect position to defend its sizeable
market share in the Russian and Kazakh fracturing markets despite the
intensifying competition. An increase of 100% in a backlog of
fracturing jobs for this strategically important client underscores
the Company´s competitiveness with regard to both quality and price
measures. The development fuels our confidence in efficient
deployment of the Company´s operating capacity and sustainability of
growth beyond 2007."

www.catoilag.com

About C.A.T. oil AG: Austria-based C.A.T. oil AG (O2C, ISIN:
AT0000A00Y78) is one of the leading providers of oil- and gasfield
services in Russia and Kazakhstan. C.A.T. oil´s core business is
hydraulic fracturing, a process which helps to open up oil- and
gas-bearing rock formations in order to increase or even enable oil
and gas production. The C.A.T. oil crews use state-of-the-art methods
and technologies to generate high pressure in the oil or gas
reservoirs concerned. This pressure causes cracks to appear in the
rock through which oil or gas can be produced in larger quantities
from the production well, and hence efficiently boosts extraction,
particularly in the case of deposits that are difficult to develop or
low-output wells. In addition, hydraulic fracturing can be used to
revitalize wells that have previously been idle.

The Company has its headquarters in Vienna and employed an average of
2,875 people in the first half of financial year 2007, most of whom
are based in Russia and Kazakhstan. Customers include leading oil and
gas producers such as Gazprom, KazMunaiGaz, LUKOIL, Rosneft, and
TNK-BP. C.A.T. oil has been listed in the Prime Standard of the
Frankfurt Stock Exchange since May 4, 2006, and has been a member of
the SDax since September 18, 2006.

end of announcement euro adhoc 23.11.2007 14:18:00
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ots Originaltext: C.A.T. oil AG
Im Internet recherchierbar: http://www.presseportal.de

Further inquiry note:
Press contact:
A&B Financial Dynamics
Dr. Lutz Golsch Claudia Werth
Tel.: +49 (0)69 92037-110 Tel.: +49 (0)69 92037-114
Email: l.golsch@abfd.de Email: c.werth@abfd.de

Branche: Oil & Gas - Upstream activities
ISIN: AT0000A00Y78
WKN: A0IKWU
Index: Classic All Share, Prime All Share, SDAX
Börsen: Börse Frankfurt / regulated dealing