| Title | Improving a 2015 Map of Geothermal Resource Probability Across the State of Hawaii |
|---|---|
| Authors | Nicole LAUTZE, Donald THOMAS, Robert WHITTIER, Stephen MARTEL, Garrett ITO, Neil FRAZER, Graham HILL, Thomas MARTIN, Phil WANNAMAKER, Nicholas HINZ |
| Year | 2017 |
| Conference | Stanford Geothermal Workshop |
| Keywords | Hawaii; Play Fairway; volcano; gravity; chemistry; groundwater; magnetotelluric; stress |
| Abstract | An initial Play Fairway analysis of geothermal resource potential across the State of Hawaii was completed in 2015. The results of this probability analysis, in addition to an evaluation of confidence in the probability value, as well as considerations of development viability, led to the identification of ten locations for exploration activities on the islands of Kauai, Oahu, Lanai, Maui, and Hawaii. With funding from the U.S. Department of Energy, the two main Phase 2 field activities currently ongoing are: i) geophysical (electromagnetic and gravity) surveys on Lanai and Haleakala’s SW rift zone (Maui) - to explore for heated fluid and intrusive rocks, and ii) a groundwater sampling and analysis campaign in the ten locations of interest - to validate groundwater indications of geothermal activity and improve knowledge of groundwater flow paths. Non-field activities include the production of crustal stress models to better infer subsurface permeability, and the integration of new data into improved 2D and in specific locations a new 3D probability map. This paper will provide preliminary results of the main Phase 2 activities; namely the geophysical survey on Lanai, the groundwater sampling and analysis campaign, and the stress modeling. |