SOURCE: Portrush Petroleum Corporation

May 22, 2007 11:53 ET

Portrush Announces Four New Wells

VANCOUVER, BC -- (MARKET WIRE) -- May 22, 2007 -- Portrush Petroleum Corporation (TSX-V: PSH) (OTCBB: PRRPF) (http://www.portrushpetroleum.com) announced today that the operator of the Mission River, Texas property has finalized plans to drill four additional wells and expects drilling activities will commence next month. Thereafter drilling will continue well-by-well with only minor breaks in between wells for geological-geophysical cross-checking purposes until the four wells are completed and hopefully on production.

The wells will be drilled to intersect the 7,800 foot interval found present and capable of production in the Scanio/Shelton No. 6 and 7 wells. The four locations were chosen based on proprietary 3-D seismic which was shot in December 2006 and newly worked within the past week.

The Company holds a 10% interest in the Mission River property and the seismic shoot covered the entire property of just over 700 acres. The seismic information and the new information derived from drilling these four wells will be used to determine the optimum number of wells that will be required to drain the reservoir.

To date three deep wells and six shallow wells have been drilled and successfully placed on production. An upgrade of the pipeline gathering system has been completed. The shutdown of the pipeline will reduce the Company's second quarter revenue by approximately $30,000. However the upgrade will allow production of up to 18,000,000 cubic feet of gas per day. Current production from the field is approximately 2.3 million cubic feet of gas and seventy barrels of oil a day.

The TSX Venture Exchange has not reviewed this press release and has neither approved nor disapproved the information contained in this press release.

For all future Portrush investor relations needs, investors are asked to visit the Portrush IR Hub at http://www.agoracom.com/IR/Portrush where they can post questions and receive answers within the same day, or simply review questions and answers posted by other investors. Alternatively, investors are able to e-mail all questions and correspondence to PSH@agoracom.com where they can also request addition to the investor e-mail list to receive all future press releases and updates in real time.

To find out more about Portrush Petroleum Corporation visit our website at www.portrushpetroleum.com or visit our Investor Relations site at http://www.agoracom.com/IR/Portrush

The statements made in this Press Release may contain forward-looking statements that may involve a number of risks and uncertainties. Actual events or results could differ materially from the Company's expectations and projections.

ON BEHALF OF THE BOARD
Mr. Martin Cotter, President & Director

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