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Advanced Geothermal Energy Production and Utilization

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H2: Geothermal".

Deadline for manuscript submissions: 10 August 2026 | Viewed by 313

Special Issue Editor


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Guest Editor
Department of Energy & Petroleum Engineering, University of North Dakota, Grand Forks, ND 58202, USA
Interests: unconventional reservoir engineering; PTA/RTA/HF; enhanced oil recovery (thermal, CO2, surfactant); geothermal reservoir engineering
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Special Issue Information

Dear Colleagues,

During the last decade, geothermal has expanded beyond conventional hydrothermal systems toward engineered, hybrid, and ultra-high-temperature resources that can deliver firm power and industrial heat at scale. This Special Issue aims to showcase state-of-the-art advances that increase deliverability, reduce levelized cost, improve operational reliability, and expand geothermal utilization across power, heat, and integrated energy systems.

Topics of interest for publication include, but are not limited to, the following:

1) EGS stimulation design and reservoir creation, including monitoring, induced seismicity mitigation, and performance forecasting.
2) Superhot and supercritical geothermal systems, including wellbore integrity, completion concepts, and high-temperature flow assurance.
3) Closed-loop and advanced well architectures (multilateral, coaxial, horizontal), including heat-extraction optimization.
4) Geothermal working-fluid innovations, such as CO2-plume geothermal, sCO2 power cycles, and hybrid binary configurations.
5) Coupled thermo-hydro-mechanical-chemical modeling and digital twins, including uncertainty quantification and inverse methods.
6) Geothermal for district heating, industrial process heat, and integrated systems, such as heat pumps and thermal energy storage.
7) Data-driven monitoring, control, and optimization of geothermal wellfields and production systems, including machine learning applications for performance enhancement.
8) Techno-economic assessment (TEA), life-cycle assessment (LCA), and market integration strategies for geothermal projects, including ancillary services and flexible dispatch.

Dr. Hadi Jabbari
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • geothermal energy
  • EGS
  • superhot geothermal
  • supercritical fluids
  • closed-loop geothermal
  • CO2-plume geothermal
  • sCO2 power cycle
  • THMC modeling
  • district heating
  • industrial heat
  • techno-economic analysis
  • digital twin

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Published Papers (1 paper)

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Research

18 pages, 3584 KB  
Article
Numerical Study of Temperature-Dependent Density and Dynamics Viscosity on EGS Performance: A Case Study in North Jiangsu Basin, China
by Ke Li, Lijuan Wang, Zujiang Luo, Dong Chen, Junpeng Guan and Zhao Li
Energies 2026, 19(11), 2508; https://doi.org/10.3390/en19112508 - 22 May 2026
Abstract
Numerical simulation is an effective method for studying groundwater flow and heat transfer in geothermal energy projects. Describing the characteristics of thermal plumes is important for operational planning of geothermal energy projects. In contrast to shallow geothermal system, the injection temperature differs significantly [...] Read more.
Numerical simulation is an effective method for studying groundwater flow and heat transfer in geothermal energy projects. Describing the characteristics of thermal plumes is important for operational planning of geothermal energy projects. In contrast to shallow geothermal system, the injection temperature differs significantly from the natural temperature of thermal reservoir in high-temperature geothermal projects, which leads to changes in fluid density and dynamics viscosity. The purpose of this paper is to investigate the impacts of temperature-induced changes in density and dynamics viscosity on simulation. The Enhanced Geothermal System (EGS) in North Jiangsu Basin, China, is taken as a case project. Based on the theory of groundwater flow and heat transfer in porous-fracture dual medium, a numerical model of EGS is established to predict the thermal performance. The density and the dynamics viscosity in the model were set as either constant or temperature-dependent to simulate the hydraulic head and temperature of the production well. The influence of temperature-induced changes in density and dynamics viscosity on the simulation was quantitatively studied. The results show that temperature-induced change in dynamics viscosity has a greater impact on the simulation, with deviation in hydraulic head exceeding 20% if the dynamics viscosity is assumed constant. The temperature-dependent variation in viscosity should be incorporated into the simulation process to improve the accuracy of the calculation. In practice, EGS projects should maximize the temperature differential between produced and injected water. The increased viscosity of lower-temperature circulation water extends its residence time within the system, thereby facilitating more thorough heat extraction. This research enhances our understanding of the role of the temperature in groundwater flow and heat transfer within EGS. Full article
(This article belongs to the Special Issue Advanced Geothermal Energy Production and Utilization)
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