Northern Petroleum Plc
LSE : NOP

August 28, 2009 02:00 ET

Grolloo Gas Field Update

Embargoed for release:  07.00 28th August 2009


                                          Northern Petroleum Plc
                                  ("Northern" or "The Company" or "NOP")
                                                     
                                         Grolloo Gas Field Update

Gas  flow  and  pressure build up measurements from test work at the Grolloo field have now been  analysed.
Northern can confirm an increased projected rate of production at 7.5 MMSCFD. Grolloo's first production is
scheduled in the fourth quarter of this year.

The  Grolloo  field in the Drenthe IV licence is one of the smaller of six Netherlands oil and  gas  fields
being  developed by the Company and is the fourth of five wells being hydraulically fractured in  what  has
proven to be a highly successful and rewarding production enhancement programme.

"Overall the hydraulic fracturing programme has exceeded even our upside expectations. Now we look  forward
to  bringing  the  Grolloo  gas field onstream at greater levels of production and  profit."  stated  Derek
Musgrove,  Managing Director of Northern.    "We have other ongoing operations in the  Netherlands.     The
Tiendeveen-1  exploration  well spudded on the 12th August is scheduled for completion  in  October.    The
hydraulic reservoir fracturing programme at Geesbrug is underway and the results of subsequent flow testing
are expected and are eagerly awaited." added Musgrove.

NPN maintains a 45% licence and working interest with EBN and Dyas having respectively 40% and 15%.

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
Derek Musgrove, Managing Director
Graham Heard, Exploration & Technical Director
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:

Northern  is  an  AIM  quoted oil and gas production, development, exploration and  asset  trading  company
focused  on  petroleum producing areas of low political risk in Europe. The Company strategy is  to  obtain
significant  and  concentrated  licence positions then add value at reasonable  risk  utilising  new  ideas
together  with new drilling, seismic, completion, field development and computer technologies to  establish
economic oil and gas production. The Company's activities are concentrated in three countries (Netherlands,
Italy and England) with the risk spread over more than 50 projects in 12 petroleum systems.  Following  the
recent  acquisition of ATI Oil Plc, Northern holds over 103 million barrels of reported Proven  &  Probable
Reserves. It has interests in 4 producing fields, both onshore and offshore, one of which it manages.

In The Netherlands under Northern management (Northern Petroleum Nederland B.V. ("NPN*") the development of
six onshore oil and gas fields is being progressed with Dyas B.V., EBN, the Netherlands' state oil company,
and NAM.

Northern  currently  manages the largest licensed exploration area in Italy, over 15,000km²,  predominantly
offshore,  but  includes six onshore permits in the Po Valley gas and oil province  in  the  north  of  the
country.

UK  production  comes from a 10% interest in the Horndean oil field and a 5% interest in the  Avington  oil
field,  both in West Sussex and Hampshire respectively. It also has planning consents to drill in the  near
future  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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