Ulumbu field is a candidate for a mini-geothermal power project, to replace the existing diesel generation. Such a small project cannot support the drilling and testing programs involved with large developments.

After the successful drilling of a well, producing large flows of dry steam, a testing program covering a total of less than 9 days' discharge over a period of two months provided definition of the reservoir fluid state and permeability distribution.

The resource can support a larger discharge of dry steam from the currently drilled area than is needed for the present project, and it is indicated that drilling elsewhere will find greater resources of two-phase fluid.

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