| Title | An Updated Computer Model of Montserrat Geothermal Field |
|---|---|
| Authors | M. van den Heuvel, M. Bremaud, M. O’Sullivan, J. O’Sullivan, J. Popineau, S. Guzman, M. Gravatt and G.A. Ryan |
| Year | 2020 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | Montserrat, geothermal model, natural state, inverse modelling |
| Abstract | The model of the geothermal field on Montserrat Island, developed at the University of Auckland in 2018, has been updated in the following three ways. First, the model grid was extended to the south-east to include more of the area around the Soufrière Hills Volcano, and the grid was refined. Secondly, temperatures inferred from a seismic velocity anomaly model (Ryan & Shalev, 2014) were included in the suite of data to be used for model calibration. Thirdly, three software packages were used for parameter estimation with the natural state model, namely: iTOUGH2, PEST and iWaiwera. iWaiwera uses the adjoint method to evaluate derivatives efficiently and therefore it was able to very quickly estimate a large number of model parameters. A good match to the downhole temperatures in wells Mon-1 and Mon-2 was obtained as well as a good match to the inferred temperatures at three elevations. |