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Processes
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Advanced Studies of Oil and Gas Flow in Unconventional Oil...
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Advanced Studies of Oil and Gas Flow in Unconventional Oil and Gas Reservoir

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

Deadline for manuscript submissions: 25 August 2025 | Viewed by 470

Special Issue Editors

Dr. Adebayo Abdulrauf

E-Mail Website
Guest Editor
Center for Integrative Petroleum Research (CIPR), College of Petroleum Engineering and Geosciences, King Fahd Univesity of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
Interests: experimental petrophysics; CCUS; hydrogen storage; foam flow in porous media; unconventional reservoirs
Dr. Liwu Jiang

E-Mail Website1 Website2
Guest Editor
1. Unconventional Petroleum Research Institute, China University of Petroleum-Beijing at Karamay, Karamay 834000, China
2. Petroleum Systems Engineering, University of Regina, Regina, SK S4S 0A2, Canada
Interests: seepage flow in porous media; reservoir numerical simulation; CCUS; transient pressure/rate analysis
Dr. Ahmed Al-Yaseri

E-Mail Website
Guest Editor
Center for Integrative Petroleum Research, Dhahran, Saudi Arabia
Interests: energy storage

Special Issue Information

Dear Colleagues,

Hydrocarbons have been explored and produced for many decades, with a particular focus on conventional reservoirs. Increased energy demands coupled with a decline in new conventional resources necessitate the exploration of non-conventional reservoirs such as shale, tight gas sands, coalbed methane, gas hydrates, and tar sands. Because the fluids in these reservoir rocks are bounded by strong capillary forces, with a reduced pathway available for flow, a new set of challenges ranging from characterization to production must be addressed. In recent years, significant technological advances have been witnessed in this field, but futher research is still needed. This Special Issue, entitled “Advanced Studies of Oil and Gas Flow in Unconventional Oil and Gas Reservoir”, aims to collect high-quality articles that present new findings, enhance our understanding of the field, and propose novel technologies related to all aspects of unconventional reservoirs. The scope of this Special Issue includes, but is not limited to, the following topics:

  • Reaservoir-scale and laboratory-scale characterization of unconventional reservoir rocks (geomechancs, petropjysics, petrography, geochemistry, etc.);
  • Simulation of oil and gas flow in unconventional rocks;
  • Unconventional rocks with respect to the United Nations sustainable development goals, such as CO2 storage and water management;
  • Systematic review papers on unconventional rocks.

Dr. Adebayo Abdulrauf
Dr. Liwu Jiang
Dr. Ahmed Al-Yaseri
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

  • unconventionals
  • petrophysics
  • geomechanics
  • oil
  • gas
  • carbondioxide
  • hydrogen storage

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Published Papers (1 paper)

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Research

16 pages, 30990 KiB  
Article
Reservoir Characterization of Tight Sandstone Gas Reservoirs: A Case Study from the He 8 Member of the Shihezi Formation, Tianhuan Depression, Ordos Basin
by Zihao Dong, Xinzhi Yan, Jingong Zhang, Zhiqiang Chen and Hongxing Ma
Processes 2025, 13(5), 1355; https://doi.org/10.3390/pr13051355 - 29 Apr 2025
Abstract
Tight sandstone gas reservoirs, characterized by low porosity (typically < 10%) and ultra-low permeability (commonly < 0.1 × 10⁻3 μm2), represent a critical transitional resource in global energy transition, accounting for over 60% of total natural gas production in regions [...] Read more.
Tight sandstone gas reservoirs, characterized by low porosity (typically < 10%) and ultra-low permeability (commonly < 0.1 × 10⁻3 μm2), represent a critical transitional resource in global energy transition, accounting for over 60% of total natural gas production in regions such as North America and Canada. In the northern Tianhuan Depression of the Ordos Basin, the Permian He 8 Member (He is the abbreviation of Shihezi) of the Shihezi Formation serves as one of the primary gas-bearing intervals within such reservoirs. Dominated by quartz sandstones (82%) with subordinate lithic quartz sandstones (15%), these reservoirs exhibit pore systems primarily supported by high-purity quartz and rigid lithic fragments. Diagenetic processes reveal sequential cementation: early-stage quartz cementation provides a framework for subsequent lithic fragment cementation, collectively resisting compaction. Depositionally, these sandstones are associated with fluvial-channel environments, evidenced by a sand-to-mud ratio of ~5.2:1. Pore structures are dominated by intergranular pores (65%), followed by dissolution pores (25%) formed via selective leaching of unstable minerals by acidic fluids in hydrothermal settings, and minor intragranular pores (10%). Authigenic clay minerals, predominantly kaolinite (>70% of total clays), act as the main interstitial material. Reservoir properties average 7.01% porosity and 0.5 × 10⁻3 μm2 permeability, defining a typical low-porosity, ultra-low-permeability system. Vertically stacked sand bodies in the He 8 Member display large single-layer thicknesses (5–12 m) and moderate sealing capacity (caprock breakthrough pressure > 8 MPa), hosting gas–water mixed-phase occurrences. Rock mechanics experiments demonstrate that fractures enhance permeability by >60%, significantly controlling reservoir heterogeneity. Full article
(This article belongs to the Special Issue Advanced Studies of Oil and Gas Flow in Unconventional Oil and Gas Reservoir)
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