Great Plains Announces Successful Flow Test at latest Crossfire Discovery



    /THIS NEWS RELEASE IS NOT FOR DISSEMINATION IN THE UNITED STATES OR TO
    ANY UNITED STATES NEWS SERVICES/


    CALGARY, Aug. 11 /CNW/ - Great Plains Exploration Inc. ("Great Plains")
(TSX-GPX) is pleased to announce that it has completed and tested its Nisku
oil well located in 9-01-50-6W5 on its Crossfire project in Pembina, Alberta.
    During the flow period, peak rates of 1,076 bbl/d of 40 degrees API oil
were reached along with associated gas of 600 mcf/d. These rates were obtained
on a 24/64" choke at a flowing pressure of approximately 740 psi. The
geological characteristics and the completion and test results are similar to
Great Plains' partner's well located approximately two kilometres west at
13-2-50-6W5 which is currently producing at over 2,800 boe/d. Also within the
test, the 9-1 well showed H2S concentration of 3.5% which is consistent with
the H2S concentration seen at the 13-2 well and significantly lower than
historical H2S rates in other Nisku wells further west in Pembina. Management
believes this will enable an acceleration of the licensing process on
follow-up wells in the Crossfire area. The licensing process has begun on up
to three delineation wells on this significant discovery.
    The 9-1 well is expected to be on production by the end of the third
quarter of 2008. The well's production rate will depend on 9-1 receiving a
pool Maximum Rate Limitation (MRL) and Good Production Practice (GPP)
approvals from the regulator. Great Plains participated for 25% of the
drilling and completion costs and will have a 17.5% interest in production.
    This successfully tested well at 9-1 follows the previously announced oil
discovery at 11-12-51-5W5, which tested at rates up to 1,390 boe/d, and
further confirms the presence of large accumulations of light oil in the
Pembina/Crossfire fairway. In total Great Plains estimates that it now has
over 1,000 boe/d of production behind pipe in the Pembina/Crossfire area.
Great Plains is undertaking a multi-well program to test a number of similar
anomalies identified from a 200 square kilometre proprietary 3-D seismic
program which was shot in 2007. With a number of additional exploratory and
development targets remaining to be drilled, this area continues to provide
the opportunity for significant growth in production and share value for Great
Plains.

    Reader Advisory

    This news release contains forward-looking statements which include, but
are not limited to: operations plans and outlook, expectations, the effect of
the transaction, timing of matters relating to the approval and implementation
of the transaction, opinions, forecasts, projections, guidance or other
statements that are not statements of fact. Although the Companies believe
that the expectations reflected in such forward-looking statements are
reasonable, they cannot give any assurance that such expectations will prove
to be correct or that the proposed transaction will be completed or required
shareholder and regulatory approvals will be received. Results of the
Companies may be affected by a variety of variables and risks associated with
oil and gas exploration, production and transportation, such as loss of
market, volatility of oil and gas prices, currency fluctuations, imprecision
of reserve estimates, environmental risks, competition from other producers,
ability to access sufficient debt and equity capital from internal and
external sources, ability to replace and expand oil and gas reserves, ability
to generate sufficient cash flow from operations to meet its current and
future obligations, and risks associated with existing and potential future
lawsuits and regulatory actions made against the Companies; as a consequence,
actual results could differ materially from those anticipated or implied in
the forward-looking statements.
    The Companies' forward-looking statements are expressly qualified in
their entirety by this cautionary statement and are made as of the date of
this news release. Unless otherwise required by applicable securities laws,
the Companies do not intend nor do they undertake any obligation to update or
review any forward-looking statements to reflect subsequent information,
event, results or circumstances or otherwise, except as may be required by
applicable securities laws.

    The TSX has neither approved nor disapproved of the contents of this
    press release.

    %SEDAR: 00020740E




For further information:

For further information: Great Plains Exploration Inc., Stephen P.
Gibson, President & CEO, Sean Bovingdon, VP Finance & CFO, Tel: (403)
262-9620, Fax: (403) 262-9622, www.greatplainsexp.com,
info@greatplainsexp.com

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GREAT PLAINS EXPLORATION INC.

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