ArticleCommunications engineering2026
Thermal-mechanical coupling in shale geothermal reservoirs: a framework for temperature-dependent seismic characterization.
Article in Communications engineering, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Reliable seismic characterization of geothermal reservoirs requires quantifying the effects of temperature on rock elastic properties. We investigate temperature-dependent seismic velocity evolution in shale through integrated laboratory ultrasonic measurements and finite-element modeling. The P- and S-wave velocities were measured on shale samples from China and the United States with diverse mineralogies over a temperature range from 20 °C to 200 °C, with numerical simulations extending the predictions to 300 °C. Results show a systematic decrease in P-wave velocity with increasing temperature. In contrast, S-wave velocity exhibits enhanced sensitivity to thermally induced micro-fracturing and pore-structure evolution, displaying a biphasic temperature response associated with the competing effects of thermoelastic softening and progressive microcrack development. Temperature-dependent rock-physics models incorporating evolving elastic moduli accurately reproduce the observed velocity trends. These findings establish a quantitative thermo-mechanical framework for interpreting seismic responses in shale-dominated geothermal systems and improve the reliability of seismic monitoring under high-temperature conditions.
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