The Horizon Europe CRM-geothermal project: Deliverable 1.1 - Report on data obtained from literature review and existing databases included in the CRM-geothermal database

CRM-geothermal Deliverable 1.1 is an outcome of Task 1.1 – Data collection and database creation. This task is about compiling the formerly existing data from literature and databases. The evaluation of these data and making any conclusions related to the geothermal and CRM potential of the selected study sites are performed in the frame of other work packages.

The recent deliverable summarises the methodology and the outcomes of the collection of formerly existing data from publications, reports and databases of other geothermal projects for the CRM- geothermal Fluid Atlas. Data on wells, fluids, rocks, as well as scales and gases were collected from the study sites of five geothermal settings that were identified in Deliverable 2.1 – Report identifying pre-existing sources of data at the selected sites (Rochelle et al. 2022). Detailed information on the geology, the geochemical characteristics and the geothermal conditions of these sites is available in D2.1. The geothermal settings and the related study areas are as follows: (1) High-enthalpy volcanic geothermal areas (Reykjanes, Tuzla geothermal field); (2) Metamorphosed flysch (Seferihisar); (3) Low salinity water in fractured crystalline rock (Cornwall); (4) Saline water in sedimentary basins (North German Basin, Upper Rhine Graben, German Molasse Basin); (5) Alkaline geothermal area (Djibouti, Tanzania, Malawi, Kenya, Rwanda, Ethiopia).

Within Task 1.1, first a template for the data collection was created with detailed guidelines. The template is an excel file with five working sheets. A separate data collection template was established for each study site. Data from the REFLECT database and other projects’ databases were reviewed and assessed, and responsible partners were asked to provide articles and reports and also to populate the excel templates. Together with this process, an online data collection platform has been developed. Data from the excel files will be imported to the online platform, which started to be populated in October 2023.

The RFELECT database contains data from 21 countries, from more than 3000 wells, almost 4000 fluid samples, 450 rock samples and about 1000 reservoirs. These data were re-assessed and imported into the CRM-geothermal database. The CHPM2030 database was also examined but no data were imported from this project as the fluid composition data are very sporadic and they are not linked to specific wells. The PERFORM dataset contains data on 53 wellbores with 26 plants, 153 fluid samples, 14 rock samples, 13 particles in fluids and 4 scale samples. These data have been included in the CRM-geothermal database.

Articles and reports were provided by the project partners responsible for the selected study sites. Data on the wells, fluids and rocks were extracted from these studies and filled to the template by UNIM and GFZ. The reviewed articles and reports are listed in Section 4.4 of this deliverable.

In this report, the status of data collection on 20th October 2023 is considered. However, the database will be completed by additional data from literature and new data will be added, which are generated in the frame of the CRM-geothermal project by sampling and analysis. After a thorough data assessment, all data will be comprised in the CRM-geothermal Fluid Atlas, which will be presented by the end of the project.