US Drilling Update

Aminex PLC
24 September 2007



24 September 2007



                             Aminex PLC ("Aminex")



                               US Drilling Update



Aminex PLC, the oil and gas company listed in London and Dublin, announces the
successful testing, fracturing  and completion of GU #37,  its third well in the
South Weslaco Field, Hidalgo County, Texas. The well tested gas at over 2.5
million cubic feet per day ("mmcfd") on a 9/64" choke and has been placed on
initial production with a temporary restricted choke at approximately 1 mmcfd.


GU #37 was drilled to a depth of 11,000' in October 2006 and identified multiple
sands in the Frio formation.  Aminex already produces gas in two neighbouring
wells from a shallower Frio sand but the objective of GU#37 was to establish
commercial production from a deep zone in the Frio sand.  Over a long period of
time strenuous efforts have been made to stimulate this deeper zone, the
alternative being to abandon the Lower Frio formation and complete an interval
higher up the well bore which would have eliminated the possibility of ever
producing from the Lower Frio interval.  This month the joint venture decided to
risk carrying out a heavy fracture of the deeper formation which has proved
successful, resulting in a flow rate of over 2.5 mmcfd and establishing the
commercial potential of the deeper zone.


Two other previously drilled wells, GU#35 and GU#36, have been on production for
some time and Aminex and partners have now proved up gas reserves in excess of
20 billion cubic feet in this field.  The incremental production from GU#37 will
have a significant positive impact on future cash flow with immediate effect.
Drilling of a fourth well is planned towards the end of this year with further
development drilling in 2008.


Following a reorganisation of joint venture interests Aminex has now increased
its interest in this well from 12.5% to 25%.  The production facilities are
operated by Apache Corporation.


Aminex Chairman Brian Hall commented:


"The successful frac of a deep zone in GU#37 greatly enhances the potential of
our South Weslaco producing property and points the way to further drilling.  It
is the first successful well result since the closing of our recent Rights Issue
and institutional placing."


Enquiries:


Aminex PLC    [phone]
Brian Hall, Chief Executive


Pelham Public Relations  [phone]
Archie Berens


                      This information is provided by RNS
            The company news service from the London Stock Exchange