World Geothermal Congress 2020+1
March - October, 2021

2020 Country Update for Eastern Caribbean Nations

Gerald HUTTRER

[Geothermal Management Company, Inc., USA]

Geothermal phenomena in the 11 volcanic Eastern Caribbean islands comprise active and dormant volcanoes, fumaroles, hot springs, mud pots, and altered ground areas. The reason for the existence of these thermal features is the westward subduction of the North Atlantic crustal plate beneath the Caribbean plate. Subsurface temperatures recorded in the region range from tepid to more than 290oC as measured in a well drilled in 2013 on Montserrat. Since 2015, geothermal exploration and negotiations for the rights to explore have increased in the region. On Montserrat, a contract has been signed by the Government with Iceland Drilling Company to drill the third well intended to supply a 2.5-3.5 MW power plant. Funding will be provided by the British Department for International Development (DFID). Following the drilling of three successful slim holes in 2008, a highly permeable, 245oC production-scale well was drilled in 2017 by Thermal Energy Partners (TEP) with whom the Nevis Island Administration signed a contract and a power purchase agreement. Preliminary exploration on Saint Kitts has had encouraging results and the government has declared its intent to build a 18-35 MW power plant. Also, since 2015, the government of Dominica and Icelandic Drilling, Inc. completed the drilling and testing of three exploratory slim holes in the Wotton Waven district, found temperatures up to about 240oC, and made preparations to build a 7 MW power plant. In St. Lucia, extensive geoscientific studies were conducted by Jacobs of New Zealand the results of which identified drilling targets outside the areas previously explored. An EISA has been completed and slim-hole drilling is being planned. World Bank and other regional sources of funds have been and will continue to be utilized. Finally, negotiations for the rights to explore and develop geothermal resources that began in 2013 continue in St. Vincent and in Grenada. Reykjavik Geothermal completed surface studies near the Soufriere Volcano on St. Vincent and, in 2018, a three-well contract with Iceland Drilling Company was signed. The first well encountered temperatures above 250oC, but low permeability. A second well has been spudded.In 2016, on Grenada, Jacobs of New Zealand completed geologic, geochemical, and magneto-telluric studies centered about Mt. St. Catherine with promising results. Further geophysical studies and eventual exploratory drilling is being planned. Direct use of thermal fluids has not increased significantly. It is limited to low temperature bathing facilities on Nevis, St. Lucia, and Grenada.

        Topic: Country Updates Paper Number: 01016

         Session 6A: Country Updates 6 -- Americas [Tuesday 13th April 2021, 10:00 am] (UTC-8)
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