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Abstract

Summary

Since the 1970s, geothermal projects have explored ways to enhance subsurface permeability, with Enhanced Geothermal Systems (EGS) emerging as a promising approach. Unlike conventional systems, EGS creates reservoirs by fracturing rock, offering greater flexibility and potential. While recent literature highlights EGS successes, less attention is given to failures, often rooted in inadequate subsurface understanding. Accurate characterization of subsurface properties and prediction of responses to stimulation are critical for EGS viability. One major challenge is acquiring and interpreting geophysical and well data under harsh underground conditions. In-situ stress—vital for hydraulic stimulation design and seismic risk assessment—is influenced by rock heterogeneity and scale effects, requiring high-quality data to reduce uncertainty. Robust subsurface modeling also depends on integrating historical insights, technological advances, and numerical techniques.

This paper reviews the current state of EGS characterization, emphasizing geomechanics as a key factor. It explores existing and emerging modeling techniques, challenges in applying models to real-world scenarios, and the importance of model verification. By addressing these issues, the paper aims to support more reliable engineering decisions and advance the development of EGS technologies.

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2025-11-12
2026-01-19

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New Generation Geomechanics Modeling for Enhanced Geothermal Systems – A Half Century of Innovation
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202586005
/content/papers/10.3997/2214-4609.202586005
/content/papers/10.3997/2214-4609.202586005
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