Drilling Update

Aminex PLC
08 April 2004



                                 AMINEX PLC
                         ("Aminex" or "the Company")


                            Nyuni-1 Drilling Update


Aminex PLC provides a further update on the Nyuni-1 well, offshore Tanzania.

Drilling has now been completed to a Total Depth of 3,895 metres, finishing in
the Upper Jurassic formation.  The target formation was the Lower Cretaceous
Neocomian sandstone of which approximately an 1,100 metre section has been
identified in the well.  Wireline log and Repeat Formation Test data have now
been successfully acquired after earlier difficulties and provide encouraging
indications for hydrocarbons despite the geologically complex nature of the
formation.

The next stage is to conduct a series of downhole tests, using a Modular
Formation Dynamics Tester tool ("MDT") to provide information on the extent of
net sand intervals, the nature of the formation fluids and properties of the
reservoir rocks.  The MDT arrived in Dar es Salaam on 6 April and will be
mobilised to Nyuni Island as soon as Tanzanian Customs formalities have been
completed.

Results of geochemical analysis conducted on down-hole samples are consistent
with the theory of a wide-spread oil-mature source rock offshore Tanzania.

A further announcement will be made when the results of the MDT test are known.


                                                                    8 April 2004


Aminex, London                                       [phone]
Brian Hall

College Hill                                         [phone]
James Henderson
Jim Joseph




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