| Title | Bathymetry as a New Tool to Map Tectonic Structures - Case Studies at Linau Lake, Indonesia and Narli Lake, Turkey |
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| Authors | Maren BREHME, Ronny GIESE, Lily SUHERLINA, Yustin KAMAH |
| Year | 2020 |
| Conference | World Geothermal Congress |
| Keywords | Tectonic structures, fault mapping, subsea, well target, permebility, hidden fault |
| Abstract | Highly permeable tectonic structures host fluid flow in geo-reservoirs. They are the target when exploiting subsurface resources, i.e. geothermal, groundwater, oil or gas. Precise mapping of these structures controls the successful targeting of wells. However, structures can be hidden by lakes, rivers or ocean. With our new approach we make it possible to locate fluid pathways beneath lakes using bathymetry and geochemical measurements. Results show linear and conic elements, which can be clearly linked to tectonic structures. Geochemical measurements identify inflow of hot saline acidic water into the lake and with it locate highly permeable structures. A calibration with well data allows to define new drilling targets into the geothermal reservoir beneath the lake. |