Gastar Exploration Announces Completion of LOR #4 Well in the Knowles Formation

    HOUSTON, September 17 /CNW/ - Gastar Exploration Ltd. (AMEX:  GST)
(TSX:YGA) announced today completion results for the Lone Oak Ranch (LOR) #4
horizontal Knowles Limestone well. The LOR #4 well was completed and is
producing at a gross sales rate of approximately 8 MMCFD with 2,500 psi
flowing tubing pressure. Gastar has a 50% working interest and an approximate
37.5% net revenue interest in the well.

    J. Russell Porter, Gastar's President and CEO, stated, "The LOR #4 is our
first horizontal Knowles well, following a vertical Knowles well completion,
the John Parker #3, earlier this year on our East Texas acreage. We believe
that Gastar is the first operator to establish commercial Knowles production
in East Texas. Now that we have had this initial success with a horizontal
well, we plan to continue to develop the potential of this formation. The
opportunity to develop the Knowles formation is an excellent addition to our
deep Bossier play, due to its shallower depth, lower drilling costs and
apparent attractive production rates."

    Gastar is currently drilling a deep Bossier well, the Wildman Trust #3
well, at an approximate depth of 8,200 feet. The Wildman Trust #3 well is
located as an offset to Gastar's recently successful Donelson #3 Bossier well.
Gastar has a 67% working interest in the well with Chesapeake Energy
Corporation (NYSE:  CHK) owning the remaining 33% working interest.

    About Gastar Exploration

    Gastar Exploration Ltd. is an exploration and production company focused
on finding and developing natural gas assets in North America and Australia.
The Company pursues a strategy combining select higher risk, deep natural gas
exploration prospects with lower risk coal bed methane (CBM) development. The
Company owns and operates exploration and development acreage in the deep
Bossier gas play of East Texas. Gastar's CBM activities are conducted within
the Powder River Basin of Wyoming and on approximately 3 million gross acres
controlled by Gastar and its joint development partners in Australia's
Gunnedah Basin, PEL 238, located in New South Wales, and the Gippsland Basin,
EL 4416, located in Victoria. For more information, visit our web site at

    Safe Harbor Statement and Disclaimer:

    This Press Release includes "forward-looking statements" within the
meaning of Section 27A of the Securities Act of 1933 and Section 21E of the
Securities Act of 1934. A statement identified by the words "expects",
"projects", "plans", and certain of the other foregoing statements may be
deemed forward-looking statements. Although Gastar believes that the
expectations reflected in such forward-looking statements are reasonable,
these statements involve risks and uncertainties that may cause actual future
activities and results to be materially different from those suggested or
described in this press release. These include risks inherent in the drilling
of natural gas and oil wells, including risks of fire, explosion, blowout,
pipe failure, casing collapse, unusual or unexpected formation pressures,
environmental hazards, and other operating and production risks inherent in
natural gas and oil drilling and production activities, which may temporarily
or permanently reduce production or cause initial production or test results
to not be indicative of future well performance or delay the timing of sales
or completion of drilling operations; risks with respect to oil and natural
gas prices, a material decline in which could cause the Company to delay or
suspend planned drilling operations or reduce production levels; and risks
relating to the availability of capital to fund drilling operations that can
be adversely affected by adverse drilling results, production declines and
declines in natural gas and oil prices and other risk factors described in the
Company's Annual Report on Form 10-K, as filed on March 27, 2007 with the
United States Securities and Exchange Commission at and on the
System for Electronic Document Analysis and Retrieval (SEDAR) at

    The American Stock Exchange and Toronto Stock Exchange have not reviewed
and do not accept responsibility for the adequacy or accuracy of this release.

For further information:

For further information: Gastar Exploration Ltd. J. Russell Porter,
Chief Executive Officer, 713-739-1800 or DRG&E Lisa
Elliott, 713-529-6600 (Investor Relations Counsel) Anne
Pearson, 713-529-6600 (Investor Relations Counsel)

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