Gastar Exploration Provides Update on Mid-Con 7H Well and Activity in Hunton Limestone Oil Play

 Gastar Exploration Provides Update on Mid-Con 7H Well and Activity in Hunton
                              Limestone Oil Play

PR Newswire

HOUSTON, Dec. 17, 2013

HOUSTON, Dec. 17, 2013 /PRNewswire/ --Gastar Exploration, Inc. ("Gastar")
(NYSE MKT: GST) today announced that the Mid-Con 7H well in its Hunton
Limestone oil play in Oklahoma reached a peak 24-hour gross initial production
("IP") rate of 906 barrels of oil equivalent ("BOE") per day and subsequently
averaged 782 BOE per day (60% crude oil) over the following 17 days. The
Mid-Con 7H well is flowing these rates naturally through 4.5-inch production
casing as compared to the previously announced wells which were flowing
through production tubing with the assistance of gas-lift. The well was
completed in the Hunton Limestone formation utilizing a 19-stage fracture
stimulation over the well's lateral length of 4,250 feet. Gastar has a 48%
working interest ("WI") (38% net revenue interest "NRI") in this non-operated
horizontal well drilled within an area of mutual interest ("AMI") in
Kingfisher County, Oklahoma.

J. Russell Porter, Gastar's President and CEO, commented "The previously
announced Hunton Limestone wells are typically flowed through 4.5-inch casing
for several days after which they cease flowing and gas-lift is installed.
The Mid-Con 7H well has continued to flow up the production casing and has yet
to cease production so it can be placed on gas-lift. With the Mid-Con 7H
results, four of our last six non-operated wells are producing, or capable of
producing, at initial production rates significantly above our internally
generated type curve of 608 BOE per day (65% crude oil) and estimated ultimate
per well recovery of 436,000 BOE. At an estimated drilling and completion cost
of $5.0 million, the Mid-Con 7H well should generate a substantial internal
rate of return at current NYMEX forward strip pricing."

The previously announced Mid-Con 6H well (GST 50% WI; 39% NRI) continues to
produce at strong rates. In the 26 days since the peak IP rate, the Mid-Con 6H
has averaged a gross production rate of 1,300 BOE per day (78% crude oil)
compared to the previously announced gross IP rate of 1,442 BOE per day and 10
day average of 1,133 BOE per day (86% crude oil).

Gastar's first operated well in our Hunton Limestone oil play, the Burton
16-1H (GST 79% WI; 66% NRI), is currently in the early stages of flow-back
operations. Gastar's second operated well, the Townsend 6-1H (GST 100% WI;
80% NRI) is currently being fracture stimulated and is expected to begin
flow-back operations in early January 2014. Drilling operations began on
Gastar's third operated well on December 11, 2013, the Taborek 22-1H (GST WI
and NRI to be determined pending outcome of forced pooling hearings), with
flow back operations expected to commence in the first quarter of 2014.

Gastar's operating partner in the AMI, Husky Ventures, is currently drilling
two Hunton wells (Mid-Con 9H and Mid-Con 10H) with one additional Hunton well
(Mid-Con 8H) waiting on completion. Gastar is participating in all of these
additional AMI wells.

About Gastar Exploration
Gastar Exploration, Inc. is an independent energy company engaged in the
exploration, development and production of oil, natural gas, condensate and
natural gas liquids in the United States. Gastar's principal business
activities include the identification, acquisition, and subsequent exploration
and development of oil and natural gas properties with an emphasis on
unconventional reserves such as shale resource plays. Gastar is currently
pursuing the development of liquids-rich natural gas in the Marcellus Shale in
West Virginia and is also in the early stages of exploring and developing the
Hunton Limestone horizontal oil play in Oklahoma. For more information, visit
Gastar's website at

Safe Harbor Statement and Disclaimer
This news release includes "forward looking statements" within the meaning of
Section 27A of the Securities Act of 1933, as amended, and Section 21E of the
Securities Exchange Act of 1934, as amended. Forward looking statements give
our current expectations, opinion, belief or forecasts of future events and
performance. A statement identified by the use of forward looking words
including "may," "expects," "projects," "anticipates," "plans," "believes,"
"estimate," "will," "should," 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 news release. These include risks inherent in natural gas
and oil drilling and production activities, including risks of fire,
explosion, blowouts, pipe failure, casing collapse, unusual or unexpected
formation pressures, environmental hazards, and other operating and production
risks, 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; delays in
receipt of drilling permits; risks with respect to natural gas and oil prices,
a material decline in which could cause Gastar to delay or suspend planned
drilling operations or reduce production levels; 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; risks relating to unexpected adverse developments
in the status of properties; borrowing base redeterminations by our banks;
risks relating to the absence or delay in receipt of government approvals or
fourth party consents; risks relating to the WEHLU Acquisition; risks relating
to our purchase of assets from Chesapeake Energy, including the risk of being
exposed to unknown contingencies or liabilities that could cause Gastar to not
realize the expected benefits of the transaction and the risk that we may be
required to fund the transaction by borrowing under our revolving credit
facility;; and other risks described in Gastar's Annual Report on Form 10-K
and other filings with the U.S. Securities and Exchange Commission ("SEC"),
available at the SEC's website at Our actual sales production
rates can vary considerably from tested initial production rates depending
upon completion and production techniques and our primary areas of operations
are subject to natural steep decline rates. By issuing forward looking
statements based on current expectations, opinions, views or beliefs, Gastar
has no obligation and, except as required by law, is not undertaking any
obligation, to update or revise these statements or provide any other
information relating to such statements.

Company Contact:

Gastar Exploration, Inc.

J. Russell Porter, President and CEO

713-739-1800 /

Investor Relations Counsel:

Lisa Elliott /

Anne Pearson /

Dennard-Lascar Associates: 713-529-6600

SOURCE Gastar Exploration, Inc.

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