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5.1
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Journals
Processes
Special Issues
Comprehensive Evaluation and Utilization of Coal Measure Mineral Resources
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Comprehensive Evaluation and Utilization of Coal Measure Mineral Resources

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Chemical Processes and Systems".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 1485

Special Issue Editors

Dr. Junjian Zhang

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Guest Editor
College of Earth Sciences & Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Interests: unconventional resource; methane adsorption; molecular structure
Special Issues, Collections and Topics in MDPI journals
Dr. Yang Wang

E-Mail Website
Guest Editor
School of Resources and Geoscience, China University of Mining and Technology, Xuzhou 221116, China
Interests: shale gas; coalbed methane; pore structure; adsorption mechanism; fractal characterization
Special Issues, Collections and Topics in MDPI journals
Dr. Junqiang Kang

E-Mail Website
Guest Editor
School of Resources and Earth Science, China University of Mining and Technology, Xuzhou 221008, China
Interests: coalbed methane; gas production; numerical simulation

Special Issue Information

Dear Colleagues,

It is of great practical significance to study the comprehensive evaluation and utilization of coal measure mineral resources. With the continuous growth of the global energy demand and an increase in the tension between resources and the environment, as an important source of traditional energy supplies, the efficient and sustainable development and utilization of coal has become crucial. The various metals and minerals associated with coal measures, such as coalbed methane, may have significant economic value and environmental benefits. Through a comprehensive and systematic assessment of the types, reserves, quality and environmental impact of these resources, resource development strategies can be formulated scientifically, resource allocation can be optimized, and the efficiency of resource utilization can be enhanced. At the same time, in-depth research and the promotion of advanced comprehensive utilization technology can not only enhance the added value of coal resources and reduce environmental pollution, but also promote the transformation and upgrade of related industries and facilitate the sustainable development of regional economy. Therefore, the comprehensive evaluation and utilization of coal mineral resources is crucial in achieving the goals of energy security, environmental protection and economic development.

Dr. Junjian Zhang
Dr. Yang Wang
Dr. Junqiang Kang
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. Processes is an international peer-reviewed open access monthly 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 2400 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

  • coalbed methane
  • coal measure minerals
  • critical elements
  • resource evaluation

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Published Papers (2 papers)

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Research

14 pages, 12055 KiB  
Article
Low-Field NMR Investigation of Imbibition in Coalbed Methane Reservoirs: Implications of Gas–Water Coexistence
by Dong Li, Yi Yang, Zekun Yue, Fei Xu, Yanzhi Liu, Yuntian Jiang and Sijian Zheng
Processes 2025, 13(1), 178; https://doi.org/10.3390/pr13010178 - 10 Jan 2025
Viewed by 358
Abstract
Investigating the imbibition characteristics of coals can yield profound insights for advancing coalbed methane extraction and utilization strategies. However, there has been little exploration of the micro-pore imbibition phenomenon during the two-phase flow of gas and water, as research has focused more on [...] Read more.
Investigating the imbibition characteristics of coals can yield profound insights for advancing coalbed methane extraction and utilization strategies. However, there has been little exploration of the micro-pore imbibition phenomenon during the two-phase flow of gas and water, as research has focused more on the process of static imbibition. In this study, we used an independently developed low-field nuclear magnetic resonance (NMR) displacement experimental device to conduct a systematic study on the dynamic imbibition phenomenon of low-permeability coals under conditions in which gas and water coexist. The experimental results show that the imbibition process under conditions of gas–water coexistence was significantly influenced by the physical properties of the coal samples, such as the wetting contact angle, porosity, and permeability. A smaller wetting contact angle and lower porosity and permeability values were indicative of a stronger imbibition effect. Meanwhile, changes in effective stress and pore pressure had a significant effect on the imbibition process. Changes in effective stress were observed to elastically compress (or expand) the coal pores, leading to intensified (or weakened) imbibition. Greater pore pressure led to a more violent imbibition reaction. These findings provide a new theoretical basis for understanding and predicting imbibition phenomena in the two-phase flow of gas and water in coalbed methane engineering, offering the potential to illuminate the intricate self-absorption phenomena occurring during CO2 geological sequestration processes. Full article
(This article belongs to the Special Issue Comprehensive Evaluation and Utilization of Coal Measure Mineral Resources)
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23 pages, 11798 KiB  
Article
Study on the Influencing Factors of CO2 Storage in Low Porosity-Low Permeability Heterogeneous Saline Aquifer
by Hongchang Hu, Dongdong Wang, Yujie Diao, Chunyuan Zhang and Ting Wang
Processes 2024, 12(12), 2933; https://doi.org/10.3390/pr12122933 - 22 Dec 2024
Viewed by 556
Abstract
The safety and long-term storage capacity of CO2 geological storage are necessary factors for project design and engineering development. Evaluating the influencing factors of CO2 storage and quantitatively analyzing the sensitivity of each parameter have an important guiding role in the [...] Read more.
The safety and long-term storage capacity of CO2 geological storage are necessary factors for project design and engineering development. Evaluating the influencing factors of CO2 storage and quantitatively analyzing the sensitivity of each parameter have an important guiding role in the design and development of storage projects. In this paper, the Liujiagou Formation in the northeast of the Ordos Basin is taken as an example. Based on the TOUGH/Petrasim simulation tool, the RZ2D geological storage model is established. Seven influencing factors, namely salinity, temperature, horizontal and vertical permeability ratio, pore geometry factor, residual gas saturation, liquid saturation and pore compression coefficient, were compared and analyzed to control the plume migration behavior, interlayer pressure accumulation and storage capacity of low porosity and low permeability heterogeneous reservoirs, and the sensitivity of each parameter to interlayer pressure and storage capacity was quantitatively analyzed. The simulation results show that the uncertain factors affect the safety of CO2 geological storage to a certain extent by affecting the speed of the residual storage and dissolution storage mechanism. High residual gas saturation and salinity will make CO2 mostly exist in the form of free state, which will adversely affect the safety and storage capacity of CO2 saline aquifer storage. High temperature and high vertical permeability ratio will lead to higher interlayer pressure accumulation, which is not conducive to the safety of the storage project but is beneficial to the storage capacity. Temperature, transverse and longitudinal permeability ratio and pore geometry factor control the propagation velocity of plume. The larger these factors are, the faster the plume velocity is. Higher liquid phase saturation is not better; higher liquid phase saturation leads to a large build-up of pressure in the reservoir and can have an adverse effect on the storage volume. The sensitivity analysis of all factors shows that the liquid saturation and temperature have the greatest influence on CO2 geological storage, and the pore compression coefficient has the least influence. The conclusions of this paper can provide a theoretical reference for the design and development of a CO2 saline aquifer storage project in a low porosity and low permeability reservoir area. Full article
(This article belongs to the Special Issue Comprehensive Evaluation and Utilization of Coal Measure Mineral Resources)
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