Northern Petroleum Plc
LSE : NOP

September 25, 2009 02:00 ET

3D Seismic Acquisition Commences Offshore Guyane

                                                                                                 25th September 2009

                                                          
                                               Northern Petroleum Plc
                                                          
                                            ("Northern" or "the Company")
                                                          
                                  3D Seismic Acquisition Commences Offshore Guyane

Northern  announces  that  seismic  operations have commenced on the  Guyane  Maritime  licence  in  which  Northpet
Investments Limited ("Northpet") has a 2.5% interest (subject to Government of France approval). The Guyane Maritime
licence is operated by Tullow Oil ("Tullow"). Northern holds 50% of the equity in Northpet.

The  Guyane Maritime licence covers some 35,200 square kilometres of the prospective area offshore French Guyane  in
water depths ranging from 200m to 3000m. Interpretation of existing seismic and well data indicates the presence  of
several  large structural and stratigraphic prospects with potential to contain significant hydrocarbon volumes.  To
date,  the exploration effort has focussed on structural prospects located on the Guyane continental shelf. However,
the  results of more recent geological work have identified the presence of stratigraphic prospects developed  along
the  shelf  edge  and slope. These features are similar in age and form to the oil discoveries such as  the  Jubilee
Field made by Tullow on the other side of the Atlantic Ocean, offshore Ghana.

The  2009  3D seismic programme will acquire data across an area covering approximately 2500 square kilometres.  The
seismic  acquisition should be complete before year end 2009. Thereafter this data will be processed and interpreted
with  the  intent of high grading the prospect inventory and completing the work programme on the block  within  the
current licence period.

Commenting  on  the  development, Derek Musgrove, Managing Director of Northern Petroleum Plc  said  "Investment  in
French Guyane is consistent with Northern's strategy to focus its resources in countries with low geopolitical risk.
Through  its  holding  in  Northpet, Northern has a modest financial exposure to an  exploration  play  that  offers
significant exploration potential analogous to the recent discoveries made by Tullow offshore Ghana. Tullow's recent
success  and  experience  in  these plays will make a significant contribution to mitigate  the  exploration  risks.
Northern looks forward to working with Tullow on the next stage in this exciting project."



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,  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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