Rex Energy Provides Operational Update on Processing Capacity

Rex Energy Provides Operational Update on Processing Capacity

STATE COLLEGE, Pa., June 2, 2014 (GLOBE NEWSWIRE) -- Rex Energy Corporation
(Nasdaq:REXX) today announced that it has begun flowing gas into MarkWest
Energy Partners, LP (NYSE:MWE) ("MarkWest") Bluestone II processing facility.

Rex Energy began flowing gas into the Bluestone II facility on May 19, 2014.
Once fully commissioned, the expanded facility will add an incremental 120
MMcf/d of processing capacity in the Butler Operated Area (of which 100 MMcf/d
will be dedicated to Rex Energy). When combined with the 90 MMcf/d of
processing capacity already available at the Sarsen and Bluestone I processing
facilities, Rex Energy will have approximately 190 MMcf/d of dedicated
processing capacity to support its Butler Operated Area development plans. Of
the 11 wells that were previously completed and awaiting processing capacity,
the company has placed 5 wells into sales and expects to place 5 more into
sales this week. The company expects to place the one remaining well into
sales by the end of the second quarter. In addition, Rex Energy expects its
first ethane sales of approximately 2,000 bbls/d to occur in early June 2014,
with an incremental 3,000 bbls/d of ethane sales to begin on or around July 1,
2014. The company expects to update its previously announced production
guidance in the upcoming weeks as additional information regarding the plant
commissioning process becomes available.

"We would like to thank our partners at MarkWest for their hard work and
diligent efforts to bring the Bluestone II processing facility online," said
Tom Stabley, Chief Executive Officer of Rex Energy. "We are pleased that we've
begun delivering gas to the Bluestone II facility and, once fully
commissioned, the increased processing capacity will support our development
plans and help us to maximize the potential of our Butler Operated Area

About Rex Energy Corporation

Rex Energy, headquartered in State College, Pennsylvania, is an independent
oil and gas exploration and production company operating in the Appalachian
and Illinois Basins within the United States. The company's strategy is to
pursue its higher potential exploration drilling prospects while acquiring oil
and natural gas properties complementary to its portfolio.

Forward-Looking Statements

This press release includes "forward-looking statements" within the meaning of
federal securities laws. All statements, other than statements of historical
facts, included in this release that address activities, events or
developments that Rex Energy expects, believes or anticipates will or may
occur in the future are forward-looking statements. Forward-looking statements
rely on a number of assumptions concerning future events and are subject to a
number of uncertainties, factors and risks, many of which are outside Rex
Energy's ability to control or predict, that could cause results to differ
materially from management's current expectations. These risks and
uncertainties include, but are not limited to, economic and market conditions,
operational considerations, the timing and success of our exploration and
development efforts and other uncertainties. Additional information concerning
these and other factors can be found in our press releases and public periodic
filings with the Securities and Exchange Commission, including our Annual
Report on Form 10-K for the year ended December 31, 2013, and we strongly
encourage you to review those documents. You should not place undue reliance
on forward-looking statements, which reflect management's views only as of the
date of this release. We undertake no obligation to revise or update any
forward-looking statements, or to make any other forward-looking statements,
whether as a result of new information, future events or otherwise.

CONTACT: Mark Aydin
         Manager, Investor Relations
         (814) 278-7249

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