ConvEx | Integrated exploration methods for imaging hydrothermal convection as target structures for deep geothermal development

Specifically, ConvEx integrates electromagnetic field methods, especially Controlled Source Electromagnetics (CSEM) and Magnetotellurics (MT), with 3D seismic information, petrophysical and borehole data, gravity-derived density information, temperature-gradient boreholes, and thermally, hydraulically, and mechanically coupled reservoir simulations to develop and test an integrated exploration strategy for imaging hydrothermal convection along fault zones.
The study focuses on geothermal exploration areas in the Upper Rhine Graben around Landau and Insheim, where fault-bound hydrothermal systems are important targets for deep geothermal energy and lithium extraction from thermal waters. By linking geophysical field and laboratory observations with 3D structural models and coupled THM simulations, ConvEx aims to improve the spatial characterization of hydrothermal convection cells and to quantify the role of fault zones in controlling temperature, fluid flow, and reservoir performance.
Within ConvEx, GFZ contributes to project coordination, electromagnetic field research, regional and local 3D structural modelling, and reservoir-scale process simulations. A central objective is to develop models that are consistent with and can be validated against temperature measurements and operational monitoring data, and to quantify model sensitivities and remaining uncertainties.
The outcome will be a transferable exploration strategy and practical guideline for reducing exploration risk in deep, low-enthalpy geothermal systems. This strategy is intended to support more reliable drilling target identification and to contribute to the sustainable development of geothermal energy resources.