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Unconventional Energy Exploration Technology

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H: Geo-Energy".

Deadline for manuscript submissions: 25 February 2026 | Viewed by 524

Special Issue Editor


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Guest Editor
School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
Interests: hydrate exploration and development; hydrate-based carbon sequestration: theory and technology; acid fracturing technology

Special Issue Information

Dear Colleagues,

As global energy demands escalate and the urgency to transition toward sustainable systems intensifies, unconventional energy resources have emerged as critical components of the future energy portfolio. These include shale gas, methane hydrates, geothermal reservoirs, hydrogen energy, bioenergy systems, etc. Advances in exploration technologies, data-driven optimization, and sustainable practices are critical to unlocking these resources responsibly. This Special Issue addresses these challenges head-on, fostering interdisciplinary collaboration to bridge innovation gaps and accelerate the transition toward a resilient, low-carbon energy future.

This Special Issue aims to present and disseminate cutting-edge advancements in the exploration, extraction, environmental management, and sustainable integration of unconventional energy resources, including fundamental theory, technological innovation, numerical modeling, and machine learning research.

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

  • Advanced Geophysical Exploration Technologies for Unconventional Hydrocarbon Reservoirs
  • Horizontal Drilling and Production Technology
  • Energy Storage Technologies
  • Fracturing Technologies: Hydraulic, Acid, and Cryogenic Stimulation
  • AI-Driven Modeling or Technologies for Energy Systems
  • Numerical Simulation Methods for Multiscale-Multiphase Flow in Porous Media
  • Policy and Economic Analysis of Unconventional Energy Development
  • Environmental Risk and Sustainability Assessment

Dr. Dongyu Wu
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 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

  • unconventional reservoir
  • renewable energy
  • low-carbon energy technologies
  • machine learning
  • reservoir stimulation techniques
  • shale gas
  • methane hydrates
  • geothermal reservoirs

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Published Papers (1 paper)

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Review

30 pages, 1430 KB  
Review
A Critical Review of Limited-Entry Liner (LEL) Technology for Unconventional Oil and Gas: A Case Study of Tight Carbonate Reservoirs
by Bohong Wu, Junbo Sheng, Dongyu Wu, Chao Yang, Xinxin Zhang and Yong He
Energies 2025, 18(19), 5159; https://doi.org/10.3390/en18195159 - 28 Sep 2025
Abstract
Limited-Entry Liner (LEL) technology has emerged as a transformative solution for enhancing hydrocarbon recovery in unconventional reservoirs while addressing challenges in carbon sequestration. This review examines the role of LEL in optimizing acid stimulation, hydraulic fracturing and production optimization, focusing on its ability [...] Read more.
Limited-Entry Liner (LEL) technology has emerged as a transformative solution for enhancing hydrocarbon recovery in unconventional reservoirs while addressing challenges in carbon sequestration. This review examines the role of LEL in optimizing acid stimulation, hydraulic fracturing and production optimization, focusing on its ability to improve fluid distribution uniformity in horizontal wells through precision-engineered orifices. By integrating theoretical models, experimental studies, and field applications, we highlight LEL’s potential to mitigate the heel–toe effect and reservoir heterogeneity, thereby maximizing stimulation efficiency. Based on a comprehensive review of existing literature, this study identifies critical limitations in current LEL models—such as oversimplified annular flow dynamics, semi-empirical treatment of wormhole propagation, and a lack of quantitative design guidance—and aims to bridge these gaps through integrated multiphysics modeling and machine learning-driven optimization. Furthermore, we explore its adaptability for controlled CO2 injection in geological storage, offering a sustainable approach to energy transition. This work provides a comprehensive yet accessible overview of LEL’s significance in both energy production and environmental sustainability. Full article
(This article belongs to the Special Issue Unconventional Energy Exploration Technology)
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