An Analogue Approach to Characterize the Basement-Sediment Transition Zone as a Geothermal Reservoir - BRGM - Bureau de recherches géologiques et minières Access content directly
Proceedings Year : 2019

An Analogue Approach to Characterize the Basement-Sediment Transition Zone as a Geothermal Reservoir

Abstract

The development of geothermal exploitation in the Upper Rhine Graben for heat and power generation requires detailed knowledge of the subsurface in order to mitigate associated geological risk and streamline exploitation techniques. In this area, several industrial projects have targeted the basement-sediment transition zone as a permeable reservoir. This is because the zone is located at a depth range where the temperature reaches values between 120 and 200 °C, which is economically exploitable for industrial heat or electricity. However, this zone is complex. Additionally, its geothermal potential is strongly affected by different types of heterogeneities, such as lithology, fracture networks and/or the geometry. Multidisciplinary and multiscale approaches are used on various sites (deep and shallow boreholes and quarries) to characterize the transition zone: structural analysis of the fracture network that constitutes the deep fluid pathway, geophysical investigations to image the geometry of this zone, fluid-rock interaction studies and petrophysical characterization to reconstruct paleo-fluid circulations and identify the most efficient fluid pathways. The various results are gathered into a conceptual model of the hydraulic behaviour of the transition zone for the sites and then used to develop new models to inform geothermal energy exploitation in this context.
Fichier principal
Vignette du fichier
11018-retour.pdf (2.09 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02316021 , version 1 (15-10-2019)

Identifiers

  • HAL Id : hal-02316021 , version 1

Cite

Chrystel Dezayes, Catherine Lerouge, Alexandra Kushnir, Michael Heap, Patrick Baud, et al.. An Analogue Approach to Characterize the Basement-Sediment Transition Zone as a Geothermal Reservoir. . ⟨hal-02316021⟩
73 View
92 Download

Share

Gmail Facebook X LinkedIn More