Northern Petroleum Plc
LSE : NOP

October 08, 2009 06:00 ET

Northern Discovers Gas at Tiendeveen

                                                                                                    8th October 2009
                                                          
                                               Northern Petroleum Plc
                                                          
                                            ("Northern" or "the Company")
                                                          
                                        NORTHERN DISCOVERS GAS AT TIENDEVEEN
                                                          
Gas has been discovered in the Tiendeveen -1 exploration well. The gas in the Permian Zechstein carbonates which had
been identified as a secondary target in the well has been confirmed from wireline logs and drilling data.

The  Geesbrug  gas field which Northern is developing nearby is also gas bearing in the same Zechstein  reservoir.
Northern  will  review  both the Tiendeveen and Geesbrug data to assess the range of possible reserves,  development
options and synergies.  No potential gas in place volumes were assigned to the Zechstein prior to drilling.

The  intermediate casing will now be run in the hole cemented and pressure tested before the drilling deeper  to  to
the primary reservoir targets located in the Permian Rotliegend sandstone and the Carboniferous Dalen and Hardenberg
sandstones. The estimated mean potential gas in place for these reservoirs is 60bcf with an upside P10 potential  of
98bcf.   Once  drilling has been completed further wireline logging will be undertaken on Tiendeveen to confirm  the
presence of hydrocarbons in the deeper primary targets.

Partners in the well are Northern Petroleum Nederland B.V. (NPN is a wholly owned subsidiary of Northern) with  45%,
EBN, the state oil company and Dyas B.V. with 40% and 15% respectively.

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
Chris Foss, Finance 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.

The  development of six onshore oil and gas fields is being progressed in The Netherlands under Northern  management
Northern Petroleum Nederland B.V. 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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