-
Sequentially optimized data acquisition for a geothermal reservoir Geothermics (IF 3.9) Pub Date : 2024-03-11 Anthony Corso, Maria Chiotoroiu, Torsten Clemens, Markus Zechner, Mykel J. Kochenderfer
Given the high energy demands for heating and cooling, and the currently limited use of renewable sources, there is a pressing need for efficient and economically viable geothermal development. However, the success of new geothermal reservoir projects hinges on numerous uncertain geological and economic factors. Prior to development, the project uncertainty can be reduced by performing costly data
-
Variability in surface CO2 flux: Implication for monitoring surface emission from geothermal fields Geothermics (IF 3.9) Pub Date : 2024-03-08 Tsung-Han Jimmy Yang, Isabelle Chambefort, Michael Rowe, Agnes Mazot, Anya Seward, Cynthia Werner, Tobias Fischer, Jun Seastres, Farrell Siega, Nick Macdonald, Thomas Brakenrig, Lauren Coup, Fiona Sander
In the last decade the international push for the development of various renewable energy and the increase of the carbon tax for emitters, has put high enthalpy geothermal on a hot seat. Anthropic geothermal emissions in volcanic areas are not negligible due to the inherent nature of their volcanic setting but are counted regardless, similarly to a gas or coal power plant, despite their non-fossil
-
Deciphering the Way Ratai geothermal system, Lampung, Indonesia: A comprehensive geochemical and isotopic analysis Geothermics (IF 3.9) Pub Date : 2024-03-06 Mochamad Iqbal, Brenda Ariesty Kusumasari
This study investigates the geochemistry and isotopic characteristics of geothermal manifestations in the Way Ratai geothermal field, Lampung, Indonesia, to elucidate the system's fluid flow, reservoir temperature, and the origins of its thermal waters. Fourteen samples were collected from Way Ratai, with three additional from Jatimulyo and four from Natar. The major ion contents and stable isotope
-
Optimized allocation of water temperature, quality, and quantity for the utilization of geothermal water from deep buried reservoirs Geothermics (IF 3.9) Pub Date : 2024-03-03 Xinyi Wang, Xiaoying Yuan, Qingna Shui, Yufeng Qi, Xiaoying Deng, Fang Yang
There is a need to fully utilize the benefits of geothermal water, while avoiding environmental problems in the development process. In this study, the water level, quantity, quality, and temperature of three sub-thermal reservoirs in Kaifeng City urban area, with burial depths of 1600−1800, 1800−2000, and 2000−2200 m, were combined with the local water demand and the actual exploitation and recharge
-
Experimental investigation on the use of PCM heat exchangers in Geo-energy piles and walls Geothermics (IF 3.9) Pub Date : 2024-03-02 Omar Elkezza, Musab Alhawat, Mostafa Mohamed, Amir Khan
The current paper aims to experimentally investigate the thermal performance of geo-energy piles and walls fabricated with Phase Change heat exchangers. Four prototype concrete geo-energy structures (i.e., piles and walls) were tested using two distinct types of heat exchangers, including standard heat exchangers and PCM heat exchangers. The PCM heat exchangers utilized in the current study were filled
-
Development and application of a geothermal bio-tracer resistant to extreme environments Geothermics (IF 3.9) Pub Date : 2024-03-02 Kai-Chun Fan, Pei-Jyuan Gao, Bo-Han Chen, Yin-Lung Han, Chieh-Lun Cheng
Tracers are key to acquiring data on fluid transport behavior and hydrological parameters. In particular, in the harnessing of geothermal energy, it is used to determine the connections between production and injection wells, the hydrological parameters of geothermal reservoirs, and the efficiency of thermal recovery. Traditional tracers are expensive and may pollute the environment. In response to
-
Experimental study on hydraulic and mechanical properties of fault rock under the thermal-hydraulic-mechanical coupling Geothermics (IF 3.9) Pub Date : 2024-03-01 Wentao Hou, Dan Ma, Xianwei Liu, Jixiong Zhang
The exploitation of hydrothermal geothermal resources (HGR) in fault zone is one of the most promising technical schemes for geothermal energy development. To understand the hydraulic and mechanical behaviors of rock mass in fault zone, a series of thermal-hydraulic-mechanical (THM) coupling tests of fault rocks were conducted, and the influence of the fault gouge content, water temperature, seepage
-
Lithium-rich basement brines: Activity versus concentration geothermometry Geothermics (IF 3.9) Pub Date : 2024-03-01 Tiziano Boschetti, Emma Salvioli-Mariani, Lorenzo Toscani
Lithium-rich brine plays a crucial role in the energy transition. Specifically, geothermal Upper Rhine Graben brines and the fluid inclusions in the adjacent southwesternmost Black Forest (Germany) are lithium-rich due to their interactions with Variscan basement rocks (granite and gneiss). Given their high salinity, however, conventional empirical geothermometers may prove inadequate, as these rely
-
Deep-time temperature field simulation of hot dry rock: A deep learning method in both time and space dimensions Geothermics (IF 3.9) Pub Date : 2024-03-01 Wanli Gao, Jingtao Zhao
Hot dry rock has emerged as a crucial renewable resource with a potential to provide significant energy to China. Accurately simulating the temperature field of hot dry rocks in space is essential in estimating their reserves. Moreover, predicting the temperature change curve of hot dry rocks over time is crucial for research in the field. Although these tasks are interrelated and share a common ground
-
A critical evaluation of the role of a geothermal system in lithium enrichment of brines in the salt flats: A case study from Laguna Verde in the Atacama Region of Chile Geothermics (IF 3.9) Pub Date : 2024-03-01 Mohammad Ayaz Alam, Adolfo Muñoz
The association between geothermal fluids and lithium-rich brines in salt flats has been evaluated in a unique natural laboratory in the Chilean Andes. The area encompasses Laguna Verde (LV), a hypersaline lake, and a salt flat () within a closed basin surrounded by volcanoes. The predominant lithology consists of andesitic-dacitic rocks, with limited occurrences of rhyolitic rocks. The LV geothermal
-
Atlas of lithium geothermal fluids in Europe Geothermics (IF 3.9) Pub Date : 2024-03-01 Blandine Gourcerol, Bernard Sanjuan, Romain Millot, Detlev Rettenmaier, Elodie Jeandel, Albert Genter, Clio Bosia, Aurélien Rombaut
In the last decade, lithium has become a strategic metal leading several European countries to assess their Li-resources. For the first time, a geochemical characterization and assessment of identified Li-rich deep fluids in Europe has been conducted. A total of 182 occurrences have been identified. Geostatistical study suggests that the highest Li concentration values (i.e. 250–480 mg/l) are strongly
-
Experimental study of mechanical properties of hot dry granite under thermal-mechanical couplings Geothermics (IF 3.9) Pub Date : 2024-03-01 Kaixuan Wang, Zaobao Liu, Ming Wu, Chuan Wang, Wanqing Shen, Jianfu Shao
The investigation of the mechanical properties of hot dry rock (HDR) is of great significance to the development of deep geothermal energy. However, the effects of thermal-mechanical couplings on the mechanical characteristics of deep HDR are currently unclear. This study investigates the mechanical behavior of deep HDR through real-time high-temperature triaxial compression experiments. The paper
-
Experimental and numerical simulation research on hot dry rock wellbore stability under different cooling methods Geothermics (IF 3.9) Pub Date : 2024-03-01 Yu Suo, Muyu Dong, Xiaofei Fu, Wenyuan He, Zhejun Pan
The exploitation of geothermal energy commonly occurs at depths ranging from 3000 to 10000 m. At these depths, the surrounding rocks experience substantial temperature and pressure, leading to alterations in their physical and mechanical properties. The infiltration of drilling fluid into the wellbore result in thermal exchange with the surrounding rocks, causing a decrease in their strength and stability
-
Potential for CO2 plume geothermal and CO2 storage in an onshore Red Sea Rift basin, Al-Wajj, Saudi Arabia: 3D reservoir modeling and simulations Geothermics (IF 3.9) Pub Date : 2024-02-29 Bora Yalcin, Justin Ezekiel, P. Martin Mai
Using supercritical instead of water for geothermal energy extraction offers advantages while enabling sequestration. The integration of capture, utilization, and storage (CCUS) in geothermal reservoirs aligns with circular carbon economy models and supports the goals of sustainable energy development. The geothermal potential of deep saline aquifers, like in the young and high-heat-flux Red Sea rift
-
The effect of turbulator holes diameter on heat transfer optimization of a geothermal heat exchanger by using nanofluid Geothermics (IF 3.9) Pub Date : 2024-02-28 Saeed Alqaed, Jawed Mustafa, S. Mohammad Sajadi, Fahad Awjah Almehmadi, Mohsen Sharifpur
This paper numerically investigates the effect of using some turbulators in a geothermal heat exchanger with the optimal arrangement. The geothermal heat exchanger includes a constant-temperature tube through which the nanofluid flow with Cu nanoparticles passes. In the geothermal heat exchanger, five conical turbulators are used on which there are some holes. By changing the radius of holes on turbulators
-
Temperature driven real-time weakening and strengthening mechanisms of unconfined granite Geothermics (IF 3.9) Pub Date : 2024-02-28 Fei Wang, Rui Pang, Heinz Konietzky, Ke Hu, Ben-Guo He, De-Hao Meng, Mohamed Ismael
The distinctive mechanical behaviors exhibited by granite under real-time temperature (RT) and after thermal treatment (AT) highlight a challenge in directly observing real-time cracking phenomena in RT granite within a laboratory setting. To overcome this limitation, a thermo-mechanical coupled grain-based model (GBM) was introduced for numerical investigations. The simulation outcomes reveal that
-
Geothermal Energy Extraction Using a Novel Combined Coaxial and U-Shaped Closed-Loop System Geothermics (IF 3.9) Pub Date : 2024-02-26 Srinivas Chappidi, Ankesh Kumar, Jogender Singh
In the present study, a novel combined coaxial and U-shaped closed-loop system was proposed to enhance the thermal performance of the U-shaped geothermal system. The proposed geothermal system consists of two separate energy extraction units, called primary and secondary systems. The primary system consists of an insulated U-shaped tube heat exchanger. In order to extract more thermal energy, a coaxial
-
Temperature description and heat extraction optimization of enhanced geothermal system via failure volume ratio Geothermics (IF 3.9) Pub Date : 2024-02-25 Weiwu Ma, Jiangzirui Xu, N.M.S. Hassan, Chong Yang, Yifan Xu, Tao Feng, Gang Liu
It is difficult to quantitatively measure the temperature characteristics to evaluate the heat extraction in Enhanced Geothermal Systems (EGS). This study aims to define a new evaluation index called failure volume ratio to describe the temperature distribution in rocks and optimize heat extraction. In the established three-dimensional thermal-hydrologic coupling model, the cumulative heat production
-
Investigation on the influence of mixed borehole depths in vertical ground heat exchanger systems Geothermics (IF 3.9) Pub Date : 2024-02-24 Ahmad Aljabr
Most studies about vertical borehole heat exchangers (BHEs) tended to focus on optimizing total borehole length with all boreholes having the same depth. This is mainly because most of the vertical BHEs design tools do not have the feature of designing mixed borehole depths at the same bore field. Because thermal saturation occurs over time at the center of the field due to thermal interaction between
-
On the use of an underground storage tank for disposing bleed water in standing column well systems Geothermics (IF 3.9) Pub Date : 2024-02-24 Mohamed Arbi Ben Aoun, Philippe Pasquier, Alain Nguyen
A standing column well is a groundwater-coupled heat pump system used for household and commercial space heating and cooling. During off-peak periods, groundwater is pumped from the well to a heat exchanger before being returned to the same well. During high-demand periods, a fraction of the outlet water is returned to the aquifer using an injection well. This operation strategy increases the thermal
-
Optimizing geothermal reservoir modeling: A unified bayesian PSO and BiGRU approach for precise history matching under uncertainty Geothermics (IF 3.9) Pub Date : 2024-02-21 Jar Ullah, Huan Li, Pantelis Soupios, Muhsan Ehsan
This research focuses on optimizing geothermal reservoir modeling tackling issues related to non-uniqueness, subsurface uncertainties, and computational intensity. The proposed workflow integrates Bayesian Particle Swarm Optimization (PSO) and a Bidirectional Gated Recurrent Unit (BiGRU) network to enhance the efficiency of history matching in the context of geothermal resource development under uncertainties
-
Distribution of excellent sandstone reservoir and migration of geothermal water in Neogene formations of Guanzhong Basin Geothermics (IF 3.9) Pub Date : 2024-02-19 Lu Luo, Chenbingjie Wu, Nanan Gao, Xiang Mao
The Guanzhong Basin is a Neogene faulted basin with rich geothermal resources . The faults are well developed, and the EW and NNE trending faults have better water conductivity. The main sandstone reservoirs, from young to old, include the Zhangjiapo Formation, the Lantian Bahe Formation, and the Gaoling Formation. This study focuses on the distribution of high-quality sand bodies in the Neogene sandstone
-
Maximizing permeability of fractured volcanic rocks through chelating-agent-assisted and pH-controlled selective mineral dissolution Geothermics (IF 3.9) Pub Date : 2024-02-18 Luis Salalá, Jonathan Argueta, Jiajie Wang, Noriaki Watanabe, Noriyoshi Tsuchiya
Chemical stimulation of geothermal reservoirs through mineral dissolution using environmentally friendly chelating agents has been suggested as a new method to complement hydraulic stimulation. However, the permeability enhancement mechanism and optimal pH remain unexplored. In this study, we conducted flooding experiments on a fractured andesitic rock at 200 °C using 20 wt% -bis(carboxymethyl)--glutamic
-
Investigation on rock-breaking and debris flow of high-pressure CO2 jet drilling using discrete element methods (DEM) Geothermics (IF 3.9) Pub Date : 2024-02-17 Can Cai, Quangong Xie, Yulong Zhao, Haitao Ren, Chen Chen, Kangkang Fan, Daping Xu, Wen-Yang Cao, Liehui Zhang, Hao Chen, Xianpeng Yang
To address the low efficiency and severe thermal wear of drill bits in geothermal drilling, CO (carbon dioxide) jet drilling as a new method is proposed. However, the rock-breaking and debris flow of composite rock-breaking of high-pressure CO&PDC cutter in CO jet drilling are crucial problems and remain unclear. Therefore, we established a discrete element model of composite rock-breaking, validated
-
Lithium: An energy transition element, its role in the future energy demand and carbon emissions mitigation strategy Geothermics (IF 3.9) Pub Date : 2024-02-17 Dornadula Chandrasekharam, M. Furkan Şener, Yaşar K. Recepoğlu, Tugba Isık, Mustafa M. Demir, Alper Baba
Energy transition elements (Li, Ni, Co, Fe, Cu) are gaining importance due to their ability to provide energy and play an important role as primary energy sources. Because of the energy density and power density, Li-ion batteries have the edge over other batteries. Li is distributed in various rock-forming minerals and brines, and geothermal waters. Though lithium-bearing minerals are spread over a
-
Using thermal response factors with time dependent thermal properties Geothermics (IF 3.9) Pub Date : 2024-02-17 Stephan Düber, Raul Fuentes, Guillermo A. Narsilio
This paper presents a simple and fast methodology to consider changing thermal properties in, for example, the design of shallow geothermal systems, by using thermal response factors. The simulation period is split into multiple sections according to the changes in thermal properties. By transforming the temperature response from one section to the next and subsequent superposition, any changes in
-
Geothermal energy potential in relation to black carbon reduction and CO2 mitigation of Himalayan geothermal belt – A review Geothermics (IF 3.9) Pub Date : 2024-02-17 Hemant Kumar Singh, D. Chandrasekharam, N.J. Raju, Shyam Ranjan
We have compiled geochemical dataset of springs (Thermal and Cold) from the Himalayan Geothermal Belt (HGB), shows slightly acidic to moderately alkaline (pH = 4.5 – 9.4) in nature with an emerging surface temperature of 27 °C – 96 °C. The calculated reservoir temperature ranged in between 78 °C – 159 °C categorize the HGB as a low- to a moderate-enthalpy geothermal system. It was observed that geochemical
-
A geophysical assessment of the Termas de Río Valdez geothermal area (Tierra del Fuego, Argentina) Geothermics (IF 3.9) Pub Date : 2024-02-16 Jorge G. Lozano, Donaldo M. Bran, Sebastian Ramirez, Florencia B. Restelli, Stefania Bunicontro, Federico Esteban, Marco Menichetti, Emanuele Lodolo, Alberto Renzulli, Juan F. Vilas, Alejandro Tassone
The Termas de Río Valdez is a low-enthalpy geothermal area located in the southernmost South America, Argentina. The area is characterized by a geologic history of changing tectonic regimes that resulted in superimposed structures. The mechanism and pathway for fluid migration of the thermal springs remains uncertain. A geophysical survey of electrical resistivity tomography profiles combined with
-
Heat transfer characteristics of external finned backfill coupled heat exchanger in mine Geothermics (IF 3.9) Pub Date : 2024-02-16 Yujiao Zhao, Xueying Lu, Lang Liu, Bo Zhang, Mengyao Wang, Hailong Zhang
There are abundant geothermal resources in mine goaf. The effective exploitation of geothermal energy is of great significance to realize the long-term sustainable development of mines. In this paper, a three-dimensional unsteady heat transfer model of a typical serpentine backfill coupled heat exchanger is established using COMSOL Multiphysics simulation software, and the accuracy of the model is
-
Circulation experiments at Utah FORGE: Near-surface seismic monitoring reveals fracture growth after shut-in Geothermics (IF 3.9) Pub Date : 2024-02-15 Peter Niemz, John McLennan, Kristine L. Pankow, James Rutledge, Kevin England
Enhanced geothermal systems (EGS) play a crucial role in the shift from fossil to renewable energy. The Utah Frontier Observatory for Research in Geothermal Energy (FORGE) is a large-scale experimental EGS that aims to overcome setbacks faced by EGS projects, such as economic viability and concerns about induced seismic activity, by studying new tools and strategies. Four circulation experiments were
-
Numerical modeling of the CO2 injection in the Kızıldere geothermal field using multiple inter-well tracer tests Geothermics (IF 3.9) Pub Date : 2024-02-15 Doguhan Barlas Sevindik, Selcuk Erol, Serhat Akin
Many geothermal power plants in Turkey emit high amounts of non-condensable gas (NCG), consisting mainly of CO. Thus, it is crucial to mitigate the NCG emissions by re-injecting the captured gas back into the reservoir. In this study, a numerical sector reservoir model is developed to inspect how the reinjected NCG dissipates in the reservoir for successful sequestration. To accurately characterize
-
Corrigendum to ‘Assessment of the theoretical models of effective thermal conductivity based on digital rock physics for clean sandstones’ [Geothermics 114 (2023) 102803] Geothermics (IF 3.9) Pub Date : 2024-02-13 Reza Najafi-Silab, Shahin Kord, Aboozar Soleymanzadeh, Ali Reza Khaz'ali
-
Impact of secondary coatings on the dissolution rate of K-feldspar: A combined experimental and modeling study Geothermics (IF 3.9) Pub Date : 2024-02-13 Marion Pollet-Villard, Arnaud Bouissonnié, Gerhard Schäfer, Philippe Ackerer, Bertrand Fritz, Martiane Cabié, Damien Daval
Heat transfer fluid mining represents a thermodynamic perturbation for geothermal reservoirs: The pumping of hot water coupled with the re-injection of colder water at depth favors the dissolution of some rock-forming minerals of the deep reservoir (e.g. feldspars), while promoting the precipitation of secondary phases, resulting in a possible change in the permeability and porosity of the reservoir
-
Shallow geothermal potential and numerical modelling of the geo-exchange for a sustainable post-earthquake building reconstruction (Potenza River valley, Marche Region, Central Italy) Geothermics (IF 3.9) Pub Date : 2024-02-12 Mario Di Pierdomenico, Marco Taussi, Antonio Galgaro, Giorgia Dalla Santa, Massimiliano Maggini, Alberto Renzulli
The southern part of the Marche Region (Italy) was hit in 2016 by dramatic seismic events that caused damages and fatalities. After these events, the national and local administrations started a development plan to improve the energy efficiency of the restored or reconstructed buildings. Shallow geothermal energy, consisting of closed-loop Borehole Heat Exchangers (BHEs) coupled with heat pumps, could
-
A predictive model of long-term performance assessment of Ground Source Heat Pump (GSHP) systems in Japanese regions Geothermics (IF 3.9) Pub Date : 2024-02-10 Saeid Mohammadzadeh Bina, Hikari Fujii, Hiroyuki Kosukegawa, Fumiaki Inagaki
This study predicts the long-term performance of ground source heat pump (GSHP) systems in different climatic regions of Japan. The research model calculates the dynamic heat load of a typical Japanese building in various cities using their meteorological data, considering different schedules for heating and cooling seasons. The model aims to analyze the performance degradation of the GSHP system after
-
Efficient data-driven models for prediction and optimization of geothermal power plant operations Geothermics (IF 3.9) Pub Date : 2024-02-08 Wei Ling, Yingxiang Liu, Robert Young, Trenton T. Cladouhos, Behnam Jafarpour
Increasing the capacity of geothermal energy as a renewable resource calls for development and deployment of efficient control and optimization technologies for geothermal power plants. A data-driven prediction and optimization model is presented as a cost-effective and efficient alternative to physics-based approach. The model predicts power output and operational cost by propagating the influence
-
Comparative and modeling study of the difference in failure mechanisms of cyclic and monotonic pneumatic fracturing of granite Geothermics (IF 3.9) Pub Date : 2024-02-07 Cunbao Li, Bowen Liu, Heping Xie, Jianjun Hu, Xiting Long
This paper conducted comparative tests of cyclic and monotonic pneumatic fracturing under three stress limits. The granite fracture initiation pressure is reduced by 18%–25% under cyclic pneumatic fracturing compared with that under monotonic pneumatic fracturing, producing wider fractures and tending to form more complex fracture networks. In monotonic pneumatic fracturing, the number of acoustic
-
Study on the resistivity structure and geothermal genesis mechanism of Gudui geothermal field in Tibet, China Geothermics (IF 3.9) Pub Date : 2024-02-07 Jiahe Yan, Zhaofa Zeng, Shuai Zhou, Yuanyuan Ming, Zhengwei Ren, Lingxu Wang, Baizhou An, Handong Tan, Jianwei Zhao
The Gudui geothermal field, situated in the Shannan region of Tibet, is classified as a shallow high-temperature hydrothermal field controlled by faults. Geothermal wells in this field can reach temperatures of up to 205 °C at a depth of 230 m, making it the highest recorded temperature for geothermal fields in China at that depth. However, the precise nature of the faults and subsurface structures
-
Prediction model of undisturbed ground temperature using artificial neural network (ANN) and multiple regressions approach Geothermics (IF 3.9) Pub Date : 2024-02-06 Makarakreasey King, Beom-Jun Kim, Chan-Young Yune
The prediction of ground temperature is of utmost importance for evaluating temperature fluctuations in both the surface and subsurface of the ground and is essential for making informed decisions. The prediction of daily ground temperature can be used in a variety of engineering fields, such as in environmental and geothermal systems. The objective of this study is to develop ground-temperature prediction
-
Sulphur evolution in acidic and alkaline geothermal water related to magma in the Rehai geothermal field in the southeastern Tibet Plateau based on stable hydrogen, oxygen, sulphur isotopes Geothermics (IF 3.9) Pub Date : 2024-02-05 Bo Li, Qingmin Kong, Fu Liao, Guangcai Wang, Fei Liu, Liang Guo, Chenglong Liu, Zheming Shi
Sulphur (S) evolution is an essential and complex process in hydrothermal systems related to magmatic heat sources. Understanding sulphur isotope changes in different thermal waters could help decipher these processes and provide insight into hydrothermal evolution and magmatic influence. In this study, acidic and alkaline geothermal spring samples were collected from the Rehai geothermal field to
-
Assessment of a medium-deep borehole thermal energy storage site in the crystalline basement: A case study of the demo site Lichtwiese Campus, Darmstadt Geothermics (IF 3.9) Pub Date : 2024-02-05 Lukas Seib, Matthis Frey, Claire Bossennec, Matthias Krusemark, Thomas Burschil, Hermann Buness, Leandra Weydt, Ingo Sass
The use of intermittent renewable energy sources is of great importance for reducing greenhouse gas emissions. Medium-deep borehole thermal energy storage systems (MD-BTES) represent an economic solution. At the Technical University of Darmstadt, Germany, an MD-BTES consisting of three 750 m deep borehole heat exchangers was constructed as a demonstrator. Before construction, a comprehensive dataset
-
Performance of horizontally loaded energy piles in saturated clay Geothermics (IF 3.9) Pub Date : 2024-02-05 Hua Zhao, Chenglong Wang, Zhixiong Chen, Gangqiang Kong
The thermomechanical behaviour of horizontally loaded energy piles in saturated clay was investigated in this study. Based on model-scale tests, a model energy pile underwent 10 heating‒cooling cycles. The temperature variation, pore water pressure, soil pressure in front of the pile, pile top displacement, and pile bending moment were measured. The results showed that the thermally induced pore water
-
Water geochemistry indicating the geological genesis of a typical unexplored geothermal system (Shidian) in the Yunnan-Sichuan-Tibet geothermal belt (YST), China Geothermics (IF 3.9) Pub Date : 2024-02-03 Xiaobo Zhang, Qinghai Guo
Distinguishing between non-magmatic and magmatic hydrothermal systems coexisting in a magmatic geothermal belt is of great significance. Shidian, located in the Yunnan-Sichuan-Tibet geothermal belt (YST), is representative of those hydrothermal areas unexplored or explored to a low degree. The hydrochemical types of the Shidian geothermal waters reflect the lithology of the reservoirs there. Lack of
-
The Reservoir Temperature Estimator (RTEst): A multicomponent geothermometry tool Geothermics (IF 3.9) Pub Date : 2024-02-03 Carl D. Palmer, Robert W. Smith, Ghanashyam Neupane, Travis L. McLing
The Reservoir Temperature Estimator (RTEst) is a multicomponent geothermometry tool for estimating reservoir geochemical parameters including reservoir temperature, CO fugacity, mass of water lost or gained, and a reaction factor. It estimates these parameters and their associated uncertainties by minimizing an objective function that is the weighted sum of squares of the saturation indices of a user-selected
-
-
A CO2 geothermal thermosiphon to preheat supply air for ventilation heat recovery systems in cold climates Geothermics (IF 3.9) Pub Date : 2024-02-02 Messaoud Badache, Zine Aidoun, François Manneh
Geothermal thermosiphons (GTs) and Heat/Energy Recovery Ventilators (HRV/ERV) are two technologies, commonly used in buildings in cold climates to fulfill separate duties. GTs are primarily used to maintain the integrity of buildings/foundations built over permafrost, while HRV/ERV are used to meet indoor air quality requirements and reducing energy consumption within buildings. Operating separately
-
The suitability of eggshell for improving the performance of water-based drilling mud in a high-temperature well Geothermics (IF 3.9) Pub Date : 2024-01-31 Adesina Samson Fadairo, Opeyemi Oni
The selection of water-based mud for drilling a high-temperature and high-pressure (HTHP) well is the choice of many drilling mud engineers. This choice of mud is more attractive because it is cost-effective, eco-friendly, and easy to prepare but its reliability for drilling shale formations and geothermal resources optimally depends on the design and inclusion of the necessary additives to the drilling
-
Potential fluid flow pathways and the geothermal structure of Kuju revealed by azimuthal anisotropic ambient noise tomography Geothermics (IF 3.9) Pub Date : 2024-01-31 Chanmaly Chhun, Takeshi Tsuji, Tatsunori Ikeda
To reveal potential geothermal fluid flows and reservoir structures beneath the Kuju Volcano group (southwest Japan) in high resolution, we analyzed 1 month of data from 29 seismometers to obtain 3D S-wave velocity and anisotropy models. We first extracted Rayleigh phase velocity dispersion curves through ambient noise cross-correlation analysis and estimated S-wave velocity models by 3D surface wave
-
Extrapolation of locations, depths, and flow rates of naturally occurring cold water recharges in the Olkaria Domes geothermal field by integrating numerical simulation and geophysical information Geothermics (IF 3.9) Pub Date : 2024-01-31 Bo Jin
This paper presents a new modeling technique to extrapolate a geothermal reservoir's cold water recharge locations, depths, and flow rates, including the time sequence of its occurrence relevant to the initiation of high enthalpy upflow, by integrating numerical simulation, field's resistivity, and mineral alteration information. The simulation results show that most cold water recharge is supplied
-
Remote sensing mapping of geothermal systems around Lake Natron in the east Africa rift system, northeastern Tanzania Geothermics (IF 3.9) Pub Date : 2024-01-31 Mwita Solomon Maswi, Elisante Elisaimon Mshiu
The Lake Natron region is one of the potential geothermal resource areas in Tanzania, this is based on previous studies that focused on geology and the characteristics of the hot springs found in this region. However, the exact locations and sizes of the geothermal system(s)in this region are still unknown and require further exploration. This study used aeromagnetic data, Digital Elevation Model (DEM)
-
Geothermal reservoir characteristics of SYYD-1 well and energy efficiency analysis after geothermal transformation Geothermics (IF 3.9) Pub Date : 2024-01-27 Xiao Li, Lin Chen, Xiaomin Zhu, Jizhong Du, Xiaoguang Wang, Jianguo Yang, Di Wang, Xiaodong Guo, Qiang Liu, Hailong Wu
SYYD-1 Well in Daqing, a shale oil parameter well, was implemented by the Shenyang Geological Survey Center of the China Geological Survey in 2019. The drilling depth and diameter are 2484.0 m and 139.7 mm, respectively. To satisfy the local demand for clean energy, cable transmission spiral perforation technology was applied to transform this well into a geothermal well. Based on a comprehensive understanding
-
Cyclic CO2 storage and geothermal energy extraction using a huff and puff technique in the Basal Cambrian Sandstone Unit, Canada Geothermics (IF 3.9) Pub Date : 2024-01-27 Nan Tai, Ian D. Gates
In this study, a single horizontal well huff and puff (cyclic) CO2 injection and hot water production system has been investigated to combine CO2 storage with geothermal energy extraction in the Basal Cambrian Sandstone Unit (BCSU) in the province of Alberta, Canada. The results reveal that the cyclic CO2 plume geothermal process realizes total CO2 storage amount and cumulative energy production varying
-
Geochemical mechanisms of water/CO2-rock interactions in EGS and its impacts on reservoir properties: A review Geothermics (IF 3.9) Pub Date : 2024-01-27 Binbin Gao, Yiman Li, Zhonghe Pang, Tianming Huang, Yanlong Kong, Bin Li, Fen Zhang
Geothermal energy from Hot Dry Rock (HDR) with poor permeability is recognized as a potential future energy source, and it can be exploited by Enhanced Geothermal System (EGS) technology. In this paper, geochemical mechanisms of typical working fluids interacting with the primary rock types of EGS reservoirs, and their impacts on reservoir properties are summarized. While traditional EGS primarily
-
Experimental study on a new type of water storage tank for geothermal heating Geothermics (IF 3.9) Pub Date : 2024-01-23 Dongxi Liu, Wei Zhang, Di Gu, Tianyi Sun
To enhance the utilization of geothermal energy in a geothermal heating and energy storage coupling system, a new water storage tank is proposed. The tank's structure comprises a horizontally designed multi-slot form with a flow equalizing plate positioned in the middle. Subsequently, an experimental system for evaluating the water storage tank's performance was designed, and a test rig was established
-
Influence of subsurface temperature on cryogenic fracturing efficacy of granite rocks from Kazakhstan Geothermics (IF 3.9) Pub Date : 2024-01-20 Sotirios Nik Longinos, Mirlan Tuleugaliyev, Randy Hazlett
Liquid nitrogen (LN2) is a new stimulation technology suitable for geothermal energy extraction that increases porosity, permeability, and overall contact area in candidate subsurface formations. It is considered appropriate for hot dry rock (HDR) reservoirs. Due to the significant temperature difference between hot rock and cryogenic fluid, extensive thermally induced cracking is anticipated upon
-
An overview of geothermal applications in the cultivation of microalgae case study: Kyushu Island, Japan Geothermics (IF 3.9) Pub Date : 2024-01-18 Shaghayegh Danehkar, Saeid Jalilinasrabady, Hamid Hosano
In the last few decades, geothermal energy has received significant attention as a solution for sustainable development. Geothermal resources can be utilized for various direct applications, including microalgae cultivation. Microalgae are a diverse group of microorganisms with significant potential due to their high growth rates and their environmentally friendly by-products. So far, microalgae production
-
Three-dimensional magnetotelluric and gravimetric imaging of Mount Lawu geothermal prospect area, Indonesia Geothermics (IF 3.9) Pub Date : 2024-01-16 Maryadi Maryadi, Evi Komala Sari, Ahmad Zarkasyi, Hideki Mizunaga
Mount Lawu is a stratovolcano located on the border of Central Java and East Java Provinces in Indonesia. At least eleven manifestations indicate its geothermal potential in the form of hot water and fumaroles. This study aims to describe a geothermal system based on an integrated analysis of magnetotelluric (MT) and satellite gravity data. Some additional geochemical and petrological data analyses
-
Hydrothermally altered shear zones: A new reservoir play for the expansion of deep geothermal exploration in crystalline settings Geothermics (IF 3.9) Pub Date : 2024-01-16 Alan Bischoff, Michael J. Heap, Perttu Mikkola, Jukka Kuva, Thierry Reuschlé, Ester M. Jolis, Jon Engström, Heini Reijonen, Tuomas Leskelä
Our study investigates the genesis of granitic reservoirs formed within a brittle shear zone in central Finland, evaluating their feasibility as deep geothermal targets. We employ a suite of laboratory-based experiments and cutting-edge analytical mineral techniques to determine the petrophysical and thermal properties of targeted granitic rocks, elucidating their formation processes. The most favorable
-
De-risking superhot EGS development through 3D play fairway analysis: Methodology development and application at Newberry Volcano, Oregon, USA Geothermics (IF 3.9) Pub Date : 2024-01-16 Nicole Taverna, Hannah Pauling, Whitney Trainor-Guitton, Amanda Kolker, Geoffrey Mibei, Patrick Dobson, Eric Sonnenthal, Xiaolei Tu, Adam Schultz
The DErisking Exploration for multiple geothermal Plays in magmatic ENvironments (DEEPEN) project aims to de-risk exploration of geothermal plays in magmatic systems, with a focus on superhot and supercritical geothermal systems. This article presents advancements in geoscientific assessment of superhot enhanced geothermal system (EGS) resources as part of the DEEPEN project, particularly in exploration
-
Simulation and comprehensive 4E study of a high-efficient CCHP arrangement utilizing geothermal energy and eco-friendly heat recovery Geothermics (IF 3.9) Pub Date : 2024-01-16 Tirumala Uday Kumar Nutakki, Lioua Kolsi, Aboulbaba Eladeb, Amir Abbas, M.A. Ahmed, Mohamed Ayadi, Taseer Muhammad, Wenxin Bai
In recent years, geothermal energy has received significant attention as it provides a sustainable and renewable energy resource for various applications. The primary objective of this study is to manage the relative irreversibility and enhance productivity through efficient utilization of geothermal energy. The present paper establishes a high-efficiency and environmentally sustainable heat integration