The development of harsh environment sensor technology can aid in data logging and monitoring of geothermal reservoirs which are challenging to assess. State-of-the-art sensors based on silicon technology are limited to temperatures below 300oC and can not survive long exposure in geothermal conditions. As a result, new material platforms that utilize chemically inert, ceramic semiconductor materials are proposed for harsh environment applications. In the proposed work a temperature sensor that can withstand the harsh reservoir environment will be developed. The scope of the proposed research is to 1) perform experimental exposure testing of sensor materials in a small-scale pressure vessel at and around the critical point of water and geothermal brine and 2) develop a harsh environment temperature sensor that can operate in harsh supercritical conditions while maintaining high sensitivities. These tasks aid in the realization of advanced sensors for geothermal logging and monitoring. Ultimately, the harsh environment technology developed in this program can lead to improvements in geophysical models as well as increased reservoir lifetimes through direct monitoring.
Project end date: 08/12/13