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Minerals
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Distribution and Development of Faults and Fractures in Shales
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Distribution and Development of Faults and Fractures in Shales

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Geochemistry and Geochronology".

Deadline for manuscript submissions: 28 February 2025 | Viewed by 5760

Special Issue Editors

Prof. Dr. Lei Gong

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Guest Editor
Bohai-Rim Energy Research Institute, Northeast Petroleum University, Qinhuangdao 066004, China
Interests: unconventional oil and gas; sub-seismic faults and fractures; mechanical stratigraphy
Special Issues, Collections and Topics in MDPI journals
Dr. Guoping Liu

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Guest Editor
Institute of Energy, Peking University, Beijing 100871, China
Interests: unconventional reservoir faults and fractures; structural diagenesis; reservoir quality evaluation
Dr. Ruyue Wang

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Guest Editor
Research Department of Unconventional Oil and Gas, SINOPEC Petroleum Exploration and Production Research Institute, Beijing 102206, China
Interests: diagenesis and evolution of unconventional reservoir; accumulation and enrichment mechanism of hydrocarbon in shale reservoir; pore structure characterization of unconventional reservoir
Special Issues, Collections and Topics in MDPI journals
Dr. Shaoqun Dong

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Guest Editor
College of Science, China University of Petroleum-Beijing, Beijing 102249, China
Interests: lithology identification; fractured reservoirs; machine learning; reservoir characterization; fracture modeling; petroleum geoscience
Dr. Zhonghu Wu

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Guest Editor
College of Civil Engineering, Guizhou University, Guiyang 550025, China
Interests: reservoir geomechanics; rock failure mechanism; natural fractures; rock mechanics

Special Issue Information

Dear Colleagues,

Fractures and faults are important storage spaces and seepage channels of shale reservoirs, which affect the enrichment law, preservation conditions, and individual well productivity of shale hydrocarbon; hence, they are important geological factors that need to be considered in shale oil and gas exploration. In recent years, with the large-scale exploration and development of shale oil and gas, many scholars have carried out extensive research on the development characteristics, formation mechanism, main control factors, evaluation and prediction methods, subsurface stress distribution, and the influence of fractures on the enrichment of shale oil and gas. The purpose of this Special Issue is to summarize the recent advances in the understanding of fracture and fault related to mineralogy, geology, geochemistry, and geophysics in shale reservoirs in recent years, promote and improve the theoretical and technical method system of fracture and fault research, and guide the exploration and development of shale oil and gas.

Prof. Dr. Lei Gong
Dr. Guoping Liu
Dr. Ruyue Wang
Dr. Shaoqun Dong
Dr. Zhonghu Wu
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. Minerals 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

  • preservation and enrichment of shale oil and gas
  • multi-scale fracture/fault identification technique
  • characterization and comprehensive evaluation of effective fractures
  • fracture formation mechanism, filling sequence, and chronology
  • structural diagenesis
  • reservoir geomechanics
  • fault sealing and stability

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Published Papers (2 papers)

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Research

17 pages, 10342 KiB  
Article
Characterization and Analysis of the Main Factors of Brittleness of Shale Oil Reservoirs in the Liushagang Formation, X Depression, Beibuwan Basin
by Fuqiang Lai, Yuejiao Liu, Mingzheng Tang, Chengxiang Zeng and Ruyue Wang
Minerals 2024, 14(9), 958; https://doi.org/10.3390/min14090958 - 23 Sep 2024
Viewed by 3300
Abstract
The analysis of the main factors of brittleness is an important basis for the selection of engineering desserts in shale oil reservoirs. In this study, with the shale oil reservoir of the Liushagang Formation in the X Depression of the Beibuwan Basin as [...] Read more.
The analysis of the main factors of brittleness is an important basis for the selection of engineering desserts in shale oil reservoirs. In this study, with the shale oil reservoir of the Liushagang Formation in the X Depression of the Beibuwan Basin as the research object, a characterization and analysis of the main factors of brittleness of the reservoir was performed in order to further reveal the brittleness of shale reservoirs in the study area. The brittleness of reservoirs in the study area was controlled by both internal and external factors, and the main factors of brittleness in the target section included the maturity of organic matter, horizontal stress difference, and brittle minerals. As the maturity of organic matter increased, the density, elastic modulus, and hardness of casein increased and the differentially hardened internal structure occurred and significantly affected brittleness. The mineral composition of the reservoir was characterized by complex mineral types and high contents of brittle minerals, and the minerals determining brittleness were mainly quartz, feldspar, calcite, and dolomite. The horizontal stress difference of the shale oil section was relatively small and contributed to fracturing and reforming. This study clarified the brittleness characteristics of E2l shale and its main factors, and provided a basis for the selection of shale formation geo-engineering dessert layers in the study area. Full article
(This article belongs to the Special Issue Distribution and Development of Faults and Fractures in Shales)
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17 pages, 14451 KiB  
Article
Pore Structure and Heterogeneity Characteristics of Coal-Bearing Marine–Continental Transitional Shales from the Longtan Formation in the South Sichuan Basin, China
by Jizhen Zhang, Wei Lin, Mingtao Li, Jianguo Wang, Xiao Xiao and Yuchuan Chen
Minerals 2024, 14(6), 588; https://doi.org/10.3390/min14060588 - 2 Jun 2024
Cited by 2 | Viewed by 1112
Abstract
Marine–continental transitional shale has become a new field for shale gas exploration and development in recent years. Its reservoir characteristics analysis lags significantly behind that of marine shale, which restricts the theoretical research on the accumulation of marine–continental transitional shale and the progress [...] Read more.
Marine–continental transitional shale has become a new field for shale gas exploration and development in recent years. Its reservoir characteristics analysis lags significantly behind that of marine shale, which restricts the theoretical research on the accumulation of marine–continental transitional shale and the progress of exploration and development. The shale pore system is complex and has strong heterogeneity, which restricts the fine evaluation and optimization of the reservoir. Based on nitrogen adsorption–desorption experiments, the morphology and structural characteristics of coal-bearing shale pores were analyzed, and then the micro-pore structure heterogeneity was quantitatively characterized based on fractal theory and nitrogen adsorption–desorption data, and the relationship between pore structure parameters and their influence on fractal characteristics were discussed. The hysteresis loop of nitrogen desorption isotherm mainly belongs to type B, indicating ink bottle, flat plate, and slit are the main pore shapes. The pore size distribution curves are left unimodal or multimodal, with the main peak around 4 nm and 20–60 nm. Smaller pores develop a larger specific surface area, resulting in a high value of fractal dimension (2.564 to 2.677). The rougher the pore surface and the larger the specific surface area provide an adequate adsorption site for shale gas adsorption and aggregation. Thus, fractal characteristics conduced to understand the pore structure, heterogeneity, and gas-bearing property of coal-bearing shale. Full article
(This article belongs to the Special Issue Distribution and Development of Faults and Fractures in Shales)
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