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Geothermal Exploration on the Island of Montserrat, Caribbean

Poux, Bastien and Brophy, Paul
[email protected]

Montserrat is located in the Caribbean and, as with many of the islands of the Caribbean Lesser Antilles, is volcanic in origin. As a result, many of the islands have a potential for geothermal electrical power generation.

EGS, Inc. (EGS) was contracted in 2009 by the Government of Montserrat to conduct a scoping survey on geothermal activity on the island, and to develop a conceptual resource model based on existing and new exploration data. EGS is also taking part in the drilling of two full-scale wells in the first quarter of 2013.

The exploration work completed by EGS included geologic, geophysical and geochemical surveys; lithologic correlation and structural interpretation constitute the geologic part of the work; the geophysical work included Magnetotelluric, Time-Domain Electromagnetic Induction techniques as well as a microseismicity study. Fluid geochemistry analyses consist of both a set of data from previous surveys and a new set of samples.

All the data compiled led to a high probability for the occurrence of a geothermal system in the southwestern portion on the island. Priority areas for exploratory drilling were defined in a zone protected from volcanic hazard and corresponding to the intersection of faults and where a clay cap has been defined by the geophysical survey. The first exploratory well spud early in 2013 and preliminary drilling results will be presented.

 

AAPG Search and Discovery Article #90162©2013 Pacific Section AAPG, SPE and SEPM Joint Technical Conference, Monterey, California, April 19-25, 2013