US Operations Update

Aminex PLC
05 March 2007





5 MARCH 2007


                                   AMINEX PLC

                          ("Aminex" or "the Company")


                               US ACTIVITY UPDATE



Aminex PLC, the oil and gas company listed in London and Dublin, offers the
following update on its US activities:


An independent report has now been finalised by Offshore Production Consultants
Ltd. ("OPC") on oil and gas properties held by the Company's wholly-owned
subsidiary Aminex USA, Inc.  OPC is a recognised oil and gas reserves
engineering firm based in London and Houston.  The report is the first full
re-evaluation of Aminex's US properties to be undertaken for three years and was
commissioned by Aminex following participation in joint venture drilling at
South Weslaco, Texas, engineering and enhancement work at the Shoats Creek
field, Louisiana, and geological work in preparation for further drilling at
Alta Loma, Texas.  The re-evaluation reflects the effects of new drilling
activity and a strong overall improvement in commodity prices.


The OPC report identifies total reserves of 5,438,000 barrels of oil equivalent,
of which 871,300 are categorised as "proved" and 4,566,300 as "probable".   No
"possible" category has been included.  In comparison, the total barrels of oil
equivalent at end 2003 was 2.6 million.


Using a discount factor of 10% and commodity prices going forward from 2010 not
exceeding $61.12/barrel for crude oil and $7.53/mcf for natural gas, the
combined value of all the US properties for Proved and Probable (2P case) is
$84,516,500.


New drilling is planned at Alta Loma and South Weslaco, Texas, in 2007 while at
Shoats Creek, Louisiana, Aminex will be entitled to receive new 3D seismic data
free of charge from Forest Oil in return for permitting a 3D seismic survey to
be carried out over its property.  Given the difficulty of the terrain at Shoats
Creek, an area of swamp and deep forestation, and the high cost of 3D seismic
under such conditions, the new data will be a valuable tool for Aminex in its
plans for further drilling at Shoats Creek.  The new 3D data is likely to be
available mid-2007.


The GU#37 well, South Weslaco, Texas, drilled last year, encountered multiple
gas-bearing sands in the Lower Frio formation but was specifically aiming for a
deeper Frio target than previously drilled.  Efforts to produce from this deeper
target have so far not been successful.  If the deeper zone cannot ultimately be
produced, plans are in place to plug it off and complete the well for production
in a shallower zone.  Aminex USA Inc. has a 12.5% working interest in GU#37 and
partners are: Apache Corporation (50%), Stalker Energy LP (24.5%) (operator),
Activa Resources LLC (12.5%) and Kaler Energy Corp (0.5%).  Aminex USA Inc.
holds a 25% working interest in the other wells drilled at South Weslaco during
the current programme which are currently producing.


Commenting on the US operations, Aminex Chief Executive Brian Hall said:


"We are very pleased to note the upgrading of our 2P reserves in the USA as
reported by OPC's engineers in their new study.  The US assets strongly underpin
 our international portfolio, which is focused on the upside potential of the
East African margin.  Most of our efforts and resources are now directed towards
progressing the East African exploration programme to the next stage in a region
which is attracting an increasing level of industry attention."


END


Enquiries:


Aminex PLC                                             [phone]
Brian Hall - Chief Executive

Pelham Public Relations                                [phone]
Archie Berens






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