AnnRG - An artificial neural network solute geothermometer ...

• Main Authors: Ystroem, Lars H., Vollmer, Mark, Kohl, Thomas, Nitschke, Fabian
• Format: Text
• Language: English
• Published: Elsevier 2023
• Subjects: AnnRG; Machine learning; Artificial neural network; Solute geothermometry; Geochemical exploration; Reservoir temperature prediction; Iceland
• Online Access: https://dx.doi.org/10.5445/ir/1000164573; https://publikationen.bibliothek.kit.edu/1000164573

Solute artificial neural network geothermometers offer the possibility to overcome the complexity given by the solute-mineral composition. Herein, we present a new concept, trained from high-quality hydrochemical data and verified by in-situ temperature measurements with a total of 208 data pairs of geochemical input parameters (Na+, K+, Ca2+, Mg2+, Cl−, SiO2, and pH) and reservoir temperature measurements being compiled. The data comprises nine geothermal sites with a broad variety of geochemical characteristics and enthalpies. Five sites with 163 samples (Upper Rhine Graben, Pannonian Basin, German Molasse Basin, Paris Basin, and Iceland) are used to develop the ANN geothermometer, while further four sites with 45 samples (Azores, El Tatio, Miavalles, and Rotorua) are used to encounter the established artificial neural network in practice to unknown data. The setup of the application, as well as the optimisation of the network architecture and its hyperparameters, are stepwise introduced. As a result, the ...