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Energies
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Advances in Geological Reservoir for CCUS
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Advances in Geological Reservoir for CCUS

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

Deadline for manuscript submissions: 30 September 2026 | Viewed by 722

Editor

Dr. Catalin Teodoriu

E-Mail Website
Guest Editor
Mewbourne School of Petroleum and Geological Engineering, University of Oklahoma, Norman, OK 73071, USA
Interests: carbon capture, utilization, and storage (CCUS); energy transition; low-carbon technologies; geological storage; CCUS geothermal integration; carbon management systems; energy efficiency; techno-economic analysis; well integrity; monitoring and verification
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The transition toward low-carbon and sustainable energy systems has made carbon capture, utilization, and storage a crucial technology that can support decarbonization strategies. In this respect, geological reservoirs remain the most secure long-term sink for capturing carbon dioxide in the subsurface. However, their successful deployment is dependent on effective integration with energy production, industrial operations, and carbon management systems.

This Special Issue aims to highlight innovations that strengthen the role of geological storage within the broader energy value chain that ranges from capture and transportation to injection, monitoring, and utilization. We welcome studies that evaluate energy efficiency, system integration, life-cycle performance, and techno-economic feasibility of CCUS projects. Contributions may include engineering designs, optimization of injection and compression systems, integration with renewable or geothermal energy sources, and data-driven tools that enhance the performance and sustainability of carbon management networks.

This special issue also seeks contributions that address integrated CCUS planning, well and barrier integrity under dynamic thermal conditions, monitoring and verification technologies, and policy or techno-economic assessments supporting the large-scale deployment of CCUS in the energy sector. This special issue aims to connect the fundamental mechanisms with engineering applications, thereby supporting the safe and efficient operation of CCUS technologies worldwide.

Dr. Catalin Teodoriu
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-anonymized 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

  • carbon capture, utilization, and storage (CCUS)
  • energy transition
  • low-carbon technologies
  • geological storage
  • CCUS geothermal integration
  • carbon management systems
  • energy efficiency
  • techno-economic analysis
  • well integrity
  • monitoring and verification

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Published Papers (1 paper)

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Research

42 pages, 7030 KB  
Article
A Structured Risk Framework for CCS AoR Wells: Qualitative FEPs to Semi-Quantitative Rankings
by Khizar Abid and Catalin Teodoriu
Energies 2026, 19(5), 1146; https://doi.org/10.3390/en19051146 - 25 Feb 2026
Viewed by 442
Abstract
Carbon Capture and Sequestration (CCS) is one of the most important technologies that can help many countries to reduce emissions into the atmosphere and lower their carbon footprint, which in turn can help to achieve the net-zero goal. However, when CO2 is [...] Read more.
Carbon Capture and Sequestration (CCS) is one of the most important technologies that can help many countries to reduce emissions into the atmosphere and lower their carbon footprint, which in turn can help to achieve the net-zero goal. However, when CO2 is injected into a suitable geological formation in the subsurface during CCS operations, it is essential to ensure that the well integrity of the legacy well within the Area of Review (AoR) is maintained so that the injected CO2 will not make its way to the shallow formation, which can ultimately contaminate the Underground Source of Drinking Water (USDW) and make it to the surface, which can have harmful effects on the environment and human health. Hence, this paper presents a semi-quantitative risk assessment framework for legacy wells within a CCS Area of Review (AoR) and for an Underground Injection Control (UIC) Class VI injection well. The method converts a Feature Event and Process screening into an interaction matrix (IM), assigns probability × severity scores using an incident potential matrix (IPM), and derives cause-and-effect metrics to rank barrier elements and wells. The legacy wells are evaluated using a 5 × 5 IM (casing, cement sheath, water composition, gas/CO2, and USDW), and the injector is assessed using a 7 × 7 IM (adding tubing and packer). From the results, it was found that the risk levels of the Types 2 and 3 wells were the highest, while Types 4–6 clustered in the medium-to-low range, and Types 7–9 and the Class VI well were dominated by low/very low classes. Therefore, it was concluded that the level of risk associated with legacy wells in the AoR depends upon well completion, the well configuration, the number of well barriers, and the depth to which the well penetrates. It was further found that, within the multi-barrier well, the risk level of the first barrier is lower; the risk score continues to increase with each subsequent barrier above it. The most critical elements in the given risk assessment framework for legacy wells in the AoR remain the well cement sheath, casing, and USDW. Meanwhile, the components that affect the well are water composition and the presence of gas/CO2. Full article
(This article belongs to the Special Issue Advances in Geological Reservoir for CCUS)
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