Modelling the La Soufrière Hydrothermal System, St. Vincent and the Grenadines
Author: Arthurton Bellot Year: 2021 Supervisors: Juliet Ann Newson , Chelsea Arlette M. Cervantes
Abstract:
This project reports the first attempt to build a reservoir model for the La Soufrière hydrothermal system. This project will lay the foundation for future models of this system and further develop St. Vincent's geothermal energy. Reykjavík Geothermal provided the geological and geothermal data in which the models were based, consisting of GIS files, well data, drilling reports, various maps and cross-sections, internal reports, and scientific papers. This data was analyzed and where necessary, interpreted in order to build a conceptual model of the geothermal system on the island.This model was based on all the geological and geothermal data such as measured physical parameters (ie, temperature and resistivity values), topographic data, surface manifestations and previous conceptual models. This conceptual model was built using Leapfrog Geothermal and was subsequently used as the basis for the TOUGH2 numerical model. A natural state TOUGH2 model was calibrated using downhole temperature data from 3 wells drilled in St. Vincent and the location of areas of high surface heat flow. This provides an initial, physically realistic model of the subsurface heat and mass flows and permeability structure of the St. Vincent geothermal reservoir.The model will be further tested, refined and otherwise modified by future data collection and well testing programs. This project was performed before the recent eruption of La Soufrière, and thus the results do not include this information. A natural state TOUGH2 model was calibrated using downhole temperature data from 3 wells drilled in St. Vincent and the location of areas of high surface heat flow. This provides an initial, physically realistic model of the subsurface heat and mass flows and permeability structure of the St. Vincent geothermal reservoir. The model will be further tested, refined and otherwise modified by future data collection and well testing programs. This project was performed before the recent eruption of La Soufrière, and thus the results do not include this information. A natural state TOUGH2 model was calibrated using downhole temperature data from 3 wells drilled in St. Vincent and the location of areas of high surface heat flow. This provides an initial, physically realistic model of the subsurface heat and mass flows and permeability structure of the St. Vincent geothermal reservoir. The model will be further tested, refined and otherwise modified by future data collection and well testing programs. This project was performed before the recent eruption of La Soufrière, and thus the results do not include this information. refined and otherwise modified by future data collection and well testing programs. This project was performed before the recent eruption of La Soufrière, and thus the results do not include this information. refined and otherwise modified by future data collection and well testing programs. This project was performed before the recent eruption of La Soufrière, and thus the results do not include this information.