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The Status and Development Trend of Geothermal Resources
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The Status and Development Trend of Geothermal Resources

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

Deadline for manuscript submissions: 15 May 2024 | Viewed by 2477

Special Issue Editors

Dr. Yilong Yuan

E-Mail Website
Guest Editor
Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
Interests: geothermal energy; enhanced geothermal system; geothermal development; energy efficiency; numerical modeling; multi-phase flow; rock mechanics; water-rock reaction
Dr. Guanhong Feng

E-Mail Website
Guest Editor
College of New Energy and Environment, Jilin University, Changchun 130021, China
Interests: supercritical geothermal; CO2 geological sequestration; multiphase flow numerical modeling
Dr. Yibin Huang

E-Mail Website
Guest Editor
School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China
Interests: coaxial borehole heat exchanger; rock mechanics; seepage heat transfer; THMC multi-field coupling

Special Issue Information

Dear Colleagues,

With the continuous increase in the human population，environmental pollution and the shortage of resources is gradually becoming a problem all over the world. Therefore, environmental protection and energy conservation and new energy development and utilization are becoming the development strategies of all countries. In addition, the goal of carbon neutrality and carbon peak requires major system changes in the energy supply. As a clean, low-carbon, and stable non-carbon-based renewable energy, geothermal energy is to have a guaranteed used in achieving this realization. A geothermal project utilizes a natural resource in the form of a flow of geothermal fluid as water and/or steam, at an elevated temperature, capable of providing energy to consumers in the form of electricity or as heat and cooling for buildings, greenhouses, aquaculture ponds, and industrial processes. Thus, governments and research institutes around the world have shown a high degree of recognition and attention to the development and utilization of geothermal energy.

Geothermal energy development and utilization is a comprehensive technology involving multiple disciplines, fields, and industries, including resource exploration and evaluation, drilling and completion, reservoir fracturing, tail water recharge, cascade utilization, heat exchange and insulation, corrosion and scale prevention, heat pump and power generation, ground engineering, operation management, and other technologies. Therefore, the development of geothermal resources requires the collaboration of scientists from different fields to achieve the goal of carbon neutrality.

This Special Issue aims to investigate the status and development trend and utilization technology of geothermal resources. Based on the analysis of the development status and trend of geothermal resources, it is helpful to promote the development of geothermal resources to facilitate new breakthroughs.

Dr. Yilong Yuan
Dr. Guanhong Feng
Dr. Yibin Huang
Guest Editors

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 100 words) can be sent to the Editorial Office for announcement on this website.

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 development
  • energy systems
  • geothermal utilization
  • geothermal heating
  • geothermal cooling
  • geothermal power generation
  • numerical modelling
  • sustainability
  • renewable energy
  • heat transfer
  • multi-phase flow
  • geothermal recharge

Published Papers (2 papers)

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Research

16 pages, 3427 KiB  
Article
Heat Production Performance from an Enhanced Geothermal System (EGS) Using CO2 as the Working Fluid
by Wentao Zhao, Yilong Yuan, Tieya Jing, Chenghao Zhong, Shoucheng Wei, Yulong Yin, Deyuan Zhao, Haowei Yuan, Jin Zheng and Shaomin Wang
Energies 2023, 16(20), 7202; https://doi.org/10.3390/en16207202 - 23 Oct 2023
Cited by 1 | Viewed by 1095
Abstract
CO2-based enhanced geothermal systems (CO2-EGS) are greatly attractive in geothermal energy production due to their high flow rates and the additional benefit of CO2 geological storage. In this work, a CO2-EGS model is built based on [...] Read more.
CO2-based enhanced geothermal systems (CO2-EGS) are greatly attractive in geothermal energy production due to their high flow rates and the additional benefit of CO2 geological storage. In this work, a CO2-EGS model is built based on the available geological data in the Gonghe Basin, Northwest China. In our model, the wellbore flow is considered and coupled with a geothermal reservoir to better simulate the complex CO2 flow and heat production behavior. Based on the fractured geothermal reservoir at depths between 2900 m and 3300 m, the long-term (30-year) heat production performance is predicted using CO2 as the working fluid with fixed wellhead pressure. The results indicate that the proposed CO2-EGS will obtain an ascending heat extraction rate in the first 9 years, followed by a slight decrease in the following 21 years. Due to the significant natural convection of CO2 (e.g., low viscosity and density) in the geothermal reservoir, the mass production rate of the CO2-EGS will reach 150 kg/s. The heat extraction rates will be greater than 32 MW throughout the 30-year production period, showing a significant production performance. However, the Joule–Thomson effect in the wellbore will result in a drastic decrease in production temperature (e.g., a 62.6 °C decrease in the production well). This means that the pre-optimization analyses and physical material treatments are required during geothermal production using CO2 as the working fluid. Full article
(This article belongs to the Special Issue The Status and Development Trend of Geothermal Resources)
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16 pages, 13609 KiB  
Article
Three-Dimensional Geological Modeling and Resource Estimation of Hot Dry Rock in the Gonghe Basin, Qinghai Province
by Guilin Zhu, Linyou Zhang, Zhihui Deng, Qingda Feng, Zhaoxuan Niu and Wenhao Xu
Energies 2023, 16(16), 5871; https://doi.org/10.3390/en16165871 - 08 Aug 2023
Cited by 1 | Viewed by 788
Abstract
The Gonghe Basin, situated on the northeastern margin of the Qinghai–Tibet Plateau, is a strike-slip pull-apart basin that has garnered considerable attention for its abundant high-temperature geothermal resources. However, as it is located far from the Himalayan geothermal belt, research on the geothermal [...] Read more.
The Gonghe Basin, situated on the northeastern margin of the Qinghai–Tibet Plateau, is a strike-slip pull-apart basin that has garnered considerable attention for its abundant high-temperature geothermal resources. However, as it is located far from the Himalayan geothermal belt, research on the geothermal resources in the Gonghe Basin has mainly focused on the heat source mechanism, with less attention given to the distribution and resource potential of hot dry rock. In this project, a comprehensive approach combining geological surveys, geophysical exploration, geochemical investigations, and deep drilling was employed to analyze the stratigraphic structure and lithological composition of the Gonghe Basin, establish a basin-scale three-dimensional geological model, and identify the lithological composition and geological structures within the basin. The model revealed that the target reservoirs of hot dry rock in the Gonghe Basin exhibit a half-graben undulation pattern, with burial depths decreasing from west to east and reaching a maximum depth of around 7000 m. Furthermore, the distribution of the temperature field in the area was determined, and the influence of temperature on rock density and specific heat was investigated to infer the thermal properties of the deep reservoirs. The Qiabuqia region, situated in the central-eastern part of the basin, was identified as a highly favorable target area for hot dry rock exploration and development. The volume method was used to evaluate the potential of hot dry rock resources in the Gonghe Basin, which was estimated to be approximately 4.90 × 1022 J, equivalent to 1.67 × 1012 t of standard coal, at depths of up to 10 km. Full article
(This article belongs to the Special Issue The Status and Development Trend of Geothermal Resources)
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