Browsing by Author "Veloso Espinosa, Eugenio Andrés"
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- ItemExtension of Duplexed Single-Ended Distributed Temperature Sensing Calibration Algorithms and Their Application in Geothermal Systems(MDPI, 2022) Lillo Briceño, Matías; Suárez Poch, Francisco Ignacio; Hausner, Mark B.; Yáñez Carrizo, Gonzalo Alejandro; Veloso Espinosa, Eugenio Andrés; CEDEUS (Chile)Fiber-optic distributed temperature sensing (DTS) has been widely used since the end of the 20th century, with various industrial, Earth sciences, and research applications. To obtain precise thermal measurements, it is important to extend the currently available DTS calibration methods, considering that environmental and deployment factors can strongly impact these measurements. In this work, a laboratory experiment was performed to assess a currently available duplexed single-ended DTS calibration algorithm and to extend it in case no temperature information is available at the end of the cables, which is extremely important in geothermal applications. The extended calibration algorithms were tested in different boreholes located in the Atacama Desert and in the Central Andes Mountains to estimate the geothermal gradient in these regions. The best algorithm found achieved a root mean square error of 0.31 +/- 0.07 degrees C at the far end of a similar to 1.1-km cable, which is much smaller than that obtained using the manufacturer algorithm (2.17 +/- 0.35 degrees C). Moreover, temperature differences between single- and double-ended measurements were less than 0.3 degrees C at the far end of the cable, which results in differences of similar to 0.5 degrees C km(-1) when determining the geothermal gradient. This improvement in the geothermal gradient is relevant, as it can reduce the drilling depth by at least 700 m in the study area. Future work should investigate new extensions of the algorithms for other DTS configurations and determining the flow rate of the Central Andes Mountains artesian well using the geothermal profile provided by the DTS measurements and the available data of the borehole
- ItemFracture network, fluid pathways and paleostress at the Tolhuaca geothermal field(2017) Perez Flores, P.; Veloso Espinosa, Eugenio Andrés; Cembrano, José; Sanchez-Alfaro, P.; Lizama C., Macarena; Arancibia Hernández, Gloria Cecilia
- ItemHybrid chitosan–Pluronic F-127 films with BaTiO3:Co nanoparticles: Synthesis and properties(2015) Fuentes, S.; Dubo, J.; Barraza, N.; Gonzalez, R.; Veloso Espinosa, Eugenio Andrés
- ItemReservoir architecture model and heat transfer modes in the El Tatio-La Torta geothermal system, Central Andes of northern Chile(2021) Letelier, J. A.; O'Sullivan, J.; Reich, M.; Veloso Espinosa, Eugenio Andrés; Sánchez-Alfaro, P.; Aravena, D.; Muñoz, M.; Morata, D.
- ItemSealing capacity of clay-cap units above the Cerro Pabellon hidden geothermal system (northern Chile) derived by soil CO2 flux and temperature measurements(2019) Taussi, M.; Nisi, B.; Pizarro, M.; Morata, D.; Veloso Espinosa, Eugenio Andrés; Volpi, G.; Vaselli, O.; Renzulli, A.
- ItemStress fields recorded on large-scale strike-slip fault systems : effects on the tectonic evolution of crustal slivers during oblique subduction(2015) Veloso Espinosa, Eugenio Andrés; Gomila, Rodrigo; Cembrano, José; González, Rodrigo; Jensen, Erik; Arancibia Hernández, Gloria Cecilia
- ItemTectonics, magmatism and paleo-fluid distribution in a strike-slip setting: Insights from the northern termination of the Liquine-Ofqui fault System, Chile(2016) Pérez Flores, Pamela; Cembrano, José; Sánchez Alfaro, Pablo; Veloso Espinosa, Eugenio Andrés; Arancibia Hernández, Gloria Cecilia; Roquer, Tomás E.
- ItemTectono-metallogenetic evolution of the Fe-Cu deposit of Dominga, northern Chile.(2017) Veloso Espinosa, Eugenio Andrés; Cembrano, José; Arancibia Hernández, Gloria Cecilia; Heuser, G.; Neira, S.; Siña, A.; Garrido, I.; Vermeesch, P.; Selby, D.
- ItemThe effect of axial stress in maximum sustainable fluid pressure in Andersonian and non-Andersonian crust : A field-based numerical study from the Southern Andes (39 degrees S)(2020) Roquer, Tomás E.; Arancibia Hernández, Gloria Cecilia; Rowland, J.; Veloso Espinosa, Eugenio Andrés; Molina, E.; Crempien de la Carrera, Jorge; Morata, D.
- ItemThe evolution of the Dominga Fe-Cu deposit (northern Chile): Insights from mineral textures and micro-CT analysis(2020) Heuser Amaya, Gert Klaus; Arancibia Hernández, Gloria Cecilia; Veloso Espinosa, Eugenio Andrés; Cembrano, José; Cordeiro Oliveira, Pedro Felipe; Nehler, M.; Bracke, R.
- ItemThe origin of the magnetic record in Eocene-Miocene coarse-grained sediments deposited in hyper-arid/arid conditions: Examples from the Atacama Desert(2019) Pizarro, H.; Rousse, S.; Riquelme, R.; Veloso Espinosa, Eugenio Andrés; Campos, E.; González, R.; Bissigd, T.; Carretier , S.; Fernández-Morta, A.; Muñoz, S.