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Reservoir architecture model and heat transfer modes in the El Tatio-La Torta geothermal system, Central Andes of northern Chile
Geothermics ( IF 3.9 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.geothermics.2020.101940
Juvenal A. Letelier , John O’Sullivan , Martin Reich , Eugenio Veloso , Pablo Sánchez-Alfaro , Diego Aravena , Mauricio Muñoz , Diego Morata

Abstract In this work, we present an update for the conceptual model of the El Tatio-La Torta geothermal system, one of the most studied geothermal fields in the Central Andes of South America. Using the structural model reported by Veloso et al. (2019) for northern Chile, the conceptual model proposes a reservoir architecture and heat transfer modes at different scales, connecting the distal catchment area located 15 km east of El Tatio with the outflow of the system: El Tatio geothermal field. The main results of this work are (a) the location of a complex and large reservoir system below El Tatio and La Torta, composed by three main levels named A, B and C, which are connected by the intersection of NW-striking left-lateral and N-striking thrust faults, (b) an explanation for the upflow below La Torta, which is given by the tectono-geothermal environment of the geothermal system, (c) the possible location of the main catchment area at the Tocorpuri basin/caldera, located 15–20 km to the east from the El Tatio geysers, and (d) an explanation for the apparent hydraulic disconnection at El Tatio observed by pressure interference tests, which is coherent with the proposed structural setting for the geothermal field. These results give a physical representation about the fluid circulation and heat transfer modes, connecting La Torta and El Tatio as a unique large-scale geothermal system in the Central Andes.

中文翻译:

智利北部安第斯山脉中部 El Tatio-La Torta 地热系统的储层结构模型和传热模式

摘要 在这项工作中,我们对 El Tatio-La Torta 地热系统的概念模型进行了更新,该系统是南美洲中部安第斯山脉研究最多的地热田之一。使用 Veloso 等人报告的结构模型。(2019) 对于智利北部,概念模型提出了不同尺度的水库结构和传热模式,将位于 El Tatio 以东 15 公里的远端集水区与系统的流出物 El Tatio 地热田连接起来。这项工作的主要结果是 (a) El Tatio 和 La Torta 下方复杂大型储层系统的位置,由 A、B 和 C 三个主要层组成,由 NW 走向的左-横向和 N 向逆冲断层,(b) 对 La Torta 下方上升流的解释,这是由地热系统的构造地热环境给出的,(c) 托科普里盆地/火山口的主要集水区的可能位置,位于 El Tatio 间歇泉以东 15-20 公里处,以及 (d)通过压力干扰测试观察到的 El Tatio 明显的水力断开的解释,这与地热场的拟议结构设置相一致。这些结果给出了流体循环和传热模式的物理表征,将 La Torta 和 El Tatio 连接为安第斯中部独特的大型地热系统。(d) 对通过压力干扰测试观察到的 El Tatio 明显的水力断开的解释,这与提出的地热田结构设置相一致。这些结果给出了流体循环和传热模式的物理表征,将 La Torta 和 El Tatio 连接为安第斯中部独特的大型地热系统。(d) 对通过压力干扰测试观察到的 El Tatio 明显的水力断开的解释,这与提出的地热田结构设置相一致。这些结果给出了流体循环和传热模式的物理表征,将 La Torta 和 El Tatio 连接为安第斯中部独特的大型地热系统。
更新日期:2021-01-01
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