Abstract
AbstractThe Los Humeros Volcanic Complex has been characterized as a suitable target for developing a super-hot geothermal system (> 350 °C). For the interpretation of geophysical data, the development and parametrization of numerical geological models, an extensive outcrop analogue study was performed to characterize all relevant key units from the basement to the cap rock regarding their petrophysical properties, mineralogy, and geochemistry. In total, 226 samples were collected and analyzed for petrophysical and thermophysical properties as well as sonic wave velocities and magnetic susceptibility. An extensive rock property database was created and more than 20 lithostratigraphic units and subunits with distinct properties were defined. Thereby, the basement rocks feature low matrix porosities (< 5%) and permeabilities (< 10–17 m2), but high thermal conductivities (2–5 W m−1 K−1) and diffusivities (≤ 4·10–6 m2s−1) as well as high sonic wave velocities (≥ 5800 m s−1). Basaltic to dacitic lavas feature matrix porosities and permeabilities in the range of < 2–30% and 10–18–10–14 m2, respectively, as well as intermediate to low thermal properties and sonic wave velocities. The pyroclastic rocks show the highest variability with respect to bulk density, matrix porosity (~ 4– > 60%) and permeability (10–18–10–13 m2), but feature overall very low thermal conductivities (< 0.5 W m−1 K−1) and sonic wave velocities (~ 1500–2400 m s−1). Specific heat capacity shows comparatively small variations throughout the dataset (~ 700–880 J kg−1 K−1), while magnetic susceptibility varies over more than four orders of magnitude showing formation-related trends (10–6–10–1 SI). By applying empirical correction functions, this study provides a full physiochemical characterization of the Los Humeros geothermal field and improves the understanding of the hydraulic and thermomechanical behavior of target formations in super-hot geothermal systems related to volcanic settings, the relationships between different rock properties, and their probability, whose understanding is crucial for the parametrization of 3D geological models.
Funder
Horizon 2020
Technische Universität Darmstadt
Publisher
Springer Science and Business Media LLC
Subject
Economic Geology,Geotechnical Engineering and Engineering Geology,Renewable Energy, Sustainability and the Environment
Reference137 articles.
1. Abdulagatov IM, Emirov SN, Abdulagatova ZZ, Askerov SY. Effect of Pressure and Temperature on the Thermal Conductivity of Rocks. J Chem Eng Data. 2006;51(1):22–33. https://doi.org/10.1021/je050016a.
2. Abdulagatova Z, Abdulagatov IM, Emirov VN. Effect of temperature and pressure on the thermal conductivity of sandstone. Int J Rock Mech Min Sci. 2009;46(6):1055–71. https://doi.org/10.1016/j.ijrmms.2009.04.011.
3. Adams SJ. Quantifying Petrophysical Uncertainties. IN: SPE 93125, SPE International conference proceeding, the 2005 Asia Pacific Oil and Gas Conference and Exhibition, 5–7 April, Jarkarta, Indonesia 2005; 2005. p. 6.
4. Arellano VM, Garcia A, Barragán RM, Izquierdo G, Aragón A, Nieva D. An updated conceptual model of the Los Humeros geothermal reservoir (Mexico). J Volcanol Geotherm Res. 2003;124(1–2):67–88. https://doi.org/10.1016/S0377-0273(03)00045-3.
5. Aretz A, Bär K, Götz AE, Sass I. Outcrop analogue study of Permocarboniferous geothermal sandstone reservoir formations (northern Upper Rhine Graben, Germany): impact of mineral content, depositional environment and diagenesis on petrophysical properties. Int J Earth Sci (geol Rundsch). 2016;2015(135):1431–52. https://doi.org/10.1007/s00531-015-1263-2.
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献