United Kingdom: British Company Drills Recharge Borehole for Deep Geothermal Project

Weardale Geothermal Borehole - Case Study (Drilcorp)

Newcastle University had recently drilled a 1000 metre deep geothermal borehole which produced heated water from deep in the Weardale granite formation.

The new project was to drill a recharge borehole into the granite several hundred metres away. The proposed borehole was to be 400 metres deep penetrating approximately 100 metres into the granite formation.

A small spot core was also to be taken of the granite as this had never been seen in solid form. The strata to be penetrated above the granite consisted of a series of limestone, mudstone and whin sill layers, many of which were fractured, cavernous and particularly hard.

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