Northern Petroleum Plc
LSE : NOP

July 09, 2009 02:30 ET

Grolloo Gas Field Flow Test Encouraging

 Embargoed for release:  0730 on 9 July 2009


                                          Northern Petroleum Plc
                                                     
                                  Grolloo Gas Field Flow Test Encouraging
                                                     
A  maximum  gas flow rate of 16 million standard cubic feet per day (MMSCFD) has been measured by  Northern
Petroleum Nederland B.V. (NPN) at its Grolloo gas field in the Drenthe IV licence.

"If  we  were  to assume a flow rate of 10 MMSCFD that would, based on a  forecast gas price of  €0.20  per
normal cubic metre, generate an annual revenue for Grolloo of approximately €8million (£6.9million) net  to
Northern.  This figure is based on NPN's 45% interest and a sustained gas production level supported  by  a
3480  psi  flowing  pressure measurement. Grolloo is one of the smaller of the six fields of  approximately
93.2 million proven and probable barrels of oil equivalence being developed in the Netherlands by NPN. This
is  the  fourth  of  a  total of five wells to be hydraulically fractured in a very successful  enhancement
programme, in which results have considerably exceeded expectations.

"The  bottom-hole  recorders  will be retrieved later this month enabling  confirmation  of  the  reservoir
pressure and final determination of the gas production profile for sales. The field is scheduled to be  put
on-stream in the fourth quarter of this year.

"Currently the well at the Geesbrug field is being prepared for hydraulic fracturing of the reservoir which
has  to date been very successful on the first four wells. At the Ottoland field, equipment and permissions
are being procured to conduct a longer production flow test of both oil and gas." commented Derek Musgrove,
Managing Director of Northern Petroleum Plc.

In  accordance with the AIM Rules - Guidance for Mining and Oil & Gas Companies, the information  contained
in this announcement has been reviewed and signed off by the Exploration and Technical Director of Northern
Petroleum Plc, Mr Graham Heard CGeol FGS, who has over 35 years experience as a petroleum geologist.

                                                ---ENDS---
                                                     

For further information please contact:

Northern Petroleum Plc                                      Tel: +44 (0) 20 7469 2900/61
Sophie Hull, Head of Corporate Communications

Jefferies International                                     Tel: +44 (0) 20 7029 8000
Chris Snoxall / Schuyler Evans

Astaire Securities                                          Tel: +44 (0) 20 7448 4400
Jerry Keen / Toby Gibbs

Bishopsgate Communications (Press)                          Tel: +44 (0) 20 7562 3350
Nick Rome / Michael Kinirons

Buchanan Communications (Analysts)                          Tel: +44 (0) 20 7466 5000
Tim Thompson / Ben Romney


Notes to Editors:

Following  completion of the acquisition of ATI Oil Plc, Northern Petroleum Plc (Northern) has  recoverable
Proven  and  Probable  reserves of approximately 103 million barrels of oil equivalence.  It  is  currently
producing gas at Waalwijk and the offshore P12 fields.

The  planned development of six onshore oil and gas fields is being progressed with Dyas B.V. and  EBN, the
Netherlands' state oil  and NAM as partners.

In  2008  Northern  sold its interest in the Waalwijk Underground Gas Storage project  application  for  an
overall consideration of £10 million.

Northern  manages the largest licensed exploration area in Italy, over 14,000 km², predominantly  offshore,
but  includes six licences in the Po Valley oil and gas province in the north of the country.  Through  its
holdings  in licences in the southern Adriatic covering the Rovesti and Giove oil discoveries  it  has  net
Probable  oil  reserves independently assessed at 53.2 million barrels recoverable. In  2008   a  deal  was
signed  with Shell Italia refunding Northern's past costs and providing for Shell Italia to fund  the  next
phases  of  exploration  of  a potential new oil province in the extension of the  Apennine  thrust  system
offshore Sicily.

In  the  UK  Northern is also a significant holder of licences in the south of England where it has  a  10%
interest in the production from the Horndean oil field and a 5% interest in the Avington oil field. It also
has  planning consents to drill an eastward extension of the Horndean oil field and an exploration well  at
Havant. Northern has a 50% interest in these ventures.

For further information on Northern visit www.northpet.com.

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