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Geothermal reservoir potential of volcaniclastic settings: The Valley of Mexico, Central Mexico

机译：火山碎屑环境的地热储层潜力：中部墨西哥谷

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摘要

The geothermal potential of the Valley of Mexico has not been addressed in the past, although volcaniclastic settings in other parts of the world contain promising target reservoir formations. An outcrop analogue study of the thermophysical rock properties of the Neogene rocks within the Valley of Mexico was conducted to assess the geothermal potential of this area. Permeability and thermal conductivity are key parameters in geothermal reservoir characterization and the values gained from outcrop samples serve as a sufficient database for further assessment. The mainly low permeable lithofacies types may be operated as stimulated systems, depending on the fracture porosity in the deeper subsurface. In some areas also auto-convective thermal water circulation might be expected and direct heat use without artificial stimulation becomes reasonable. Thermophysical properties of tuffs and siliciclastic rocks qualify them as target horizons for future utilization of deep geothermal reservoirs.
机译：尽管世界其他地区的火山碎屑环境包含有希望的目标储层，但过去没有解决过墨西哥谷的地热潜力。对墨西哥谷内新近纪岩石的热物理岩石性质进行了露头模拟研究，以评估该地区的地热潜力。渗透率和导热系数是地热储层表征的关键参数，从露头样品获得的值可作为进一步评估的充分数据库。取决于较深地下的裂缝孔隙度，主要是低渗透性岩相类型可以作为增产系统运行。在某些地区，也可能会采用自动对流的热水循环系统，并且在没有人工刺激的情况下直接使用热量变得合理。凝灰岩和硅质碎屑岩的热物理性质使其成为深层地热储层未来利用的目标层。

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