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Gels
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Advanced Gels for Oil Recovery (2nd Edition)
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Advanced Gels for Oil Recovery (2nd Edition)

A special issue of Gels (ISSN 2310-2861). This special issue belongs to the section "Gel Applications".

Deadline for manuscript submissions: 25 May 2024 | Viewed by 1816

Special Issue Editors

Prof. Dr. Han Jia

E-Mail Website
Guest Editor
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Interests: surfactant; nanomaterial; self-assembly; molecular simulation; improved oil recovery
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Mingwei Zhao

E-Mail Website
Guest Editor
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Interests: improved oil recovery; fracturing fluid; surfactant; polymer; nanoparticle
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Various gels have been used in oil fields for many years to control fluid flow in reservoirs. Viscoelastic gels can effectively block reservoirs with a high permeability, resulting in a greatly increased sweep efficiency. Many research groups have focused on improvements in the strength, elastic modulus, dewatering rate, breakthrough pressure and microstructure of gels, and systematically evaluated the performances of these gels in terms of their temperature, salt resistance, blocking and long-term stability. Recently, many studies have further modified the viscosity and reduced the filtration loss of gel-forming fluids, controlling the gel forming time of these gels to achieve deep and stable water plugging. Moreover, gels with a high viscosity, good shear recovery and facile gel breaking can also be used as fracturing fluids. Their significant properties, such as retardation, sand carrying capability, temperature resistance, shear resistance, gel breaking capability and so on, have been widely investigated to meet the requirements of practical applications. With the exploration and development of unconventional oil and gas, gels are beginning to play increasingly essential roles in various fields of research, and advanced gels are still in high demand for use in harsh conditions. We look forward to submissions about the latest research achievements on advanced gels for oil recovery, for which theoretical, experimental and application studies are welcome.

Prof. Dr. Han Jia
Prof. Dr. Mingwei Zhao
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. Gels 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 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

  • application of polymer gels in improved oil recovery
  • theory of polymer gels in improved oil recovery
  • synthesis and characterization of advanced polymer gels
  • structure-property relationships of novel polymer
  • unconventional oil and gas exploration and development

Published Papers (2 papers)

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Research

12 pages, 2768 KiB  
Article
Study on a Strong Polymer Gel by the Addition of Micron Graphite Oxide Powder and Its Plugging of Fracture
by Bin Shi, Guangming Zhang, Lei Zhang, Chengjun Wang, Zhonghui Li and Fangping Chen
Gels 2024, 10(5), 304; https://doi.org/10.3390/gels10050304 - 30 Apr 2024
Viewed by 326
Abstract
It is difficult to plug the fracture water channeling of a fractured low-permeability reservoir during water flooding by using the conventional acrylamide polymer gel due to its weak mechanical properties. For this problem, micron graphite powder is added to enhance the comprehensive properties [...] Read more.
It is difficult to plug the fracture water channeling of a fractured low-permeability reservoir during water flooding by using the conventional acrylamide polymer gel due to its weak mechanical properties. For this problem, micron graphite powder is added to enhance the comprehensive properties of the acrylamide polymer gel, which can improve the plugging effect of fracture water channeling. The chemical principle of this process is that the hydroxyl and carboxyl groups of the layered micron graphite powder can undergo physicochemical interactions with the amide groups of the polyacrylamide molecule chain. As a rigid structure, the graphite powder can support the flexible skeleton of the original polyacrylamide molecule chain. Through the synergy of the rigid and flexible structures, the viscoelasticity, thermal stability, tensile performance, and plugging ability of the new-type gel can be significantly enhanced. Compared with a single acrylamide gel, after adding 3000 mg/L of micrometer-sized graphite powder, the elastic modulus, the viscous modulus, the phase transition temperature, the breakthrough pressure gradient, the elongation at break, and the tensile stress of the acrylamide gel are all greatly improved. After adding the graphite powder to the polyacrylamide gel, the fracture water channeling can be effectively plugged. The characteristics of the networked water flow channel are obvious during the injected water break through the gel in the fracture. The breakthrough pressure of water flooding is high. The experimental results are an attempt to develop a new gel material for the water plugging of a fractured low-permeability reservoir. Full article
(This article belongs to the Special Issue Advanced Gels for Oil Recovery (2nd Edition))
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15 pages, 3601 KiB  
Article
Development and Gelation Mechanism of Ultra-High-Temperature-Resistant Polymer Gel
by Zhenfeng Ma, Mingwei Zhao, Ziteng Yang, Xiangyu Wang and Caili Dai
Gels 2023, 9(9), 726; https://doi.org/10.3390/gels9090726 - 07 Sep 2023
Cited by 1 | Viewed by 1250
Abstract
To expand the applicability of gel fracturing fluids in ultra-high-temperature reservoirs, a temperature-resistant polymer was synthesized using the solution polymerization method. Subsequently, an ultra-high-temperature-resistant polymer gel was formulated by incorporating an organic zirconium crosslinking agent. A comprehensive investigation was carried out to systematically [...] Read more.
To expand the applicability of gel fracturing fluids in ultra-high-temperature reservoirs, a temperature-resistant polymer was synthesized using the solution polymerization method. Subsequently, an ultra-high-temperature-resistant polymer gel was formulated by incorporating an organic zirconium crosslinking agent. A comprehensive investigation was carried out to systematically study and evaluate the steady shear property, dynamic viscoelasticity, and temperature and shear resistance performance, as well as the core damage characteristics of the polymer gel. The obtained results demonstrate that the viscosity remained at 147 mPa·s at a temperature of 200 °C with a shear rate of 170 s−1. Compared with the significant 30.9% average core damage rate observed in the guanidine gum fracturing fluid, the core damage attributed to the polymer gel was substantially mitigated, measuring only 16.6%. Finally, the gelation mechanism of the polymer gel was scrutinized in conjunction with microscopic morphology analysis. We expect that this study will not only contribute to the effective development of deep and ultradeep oil and gas reservoirs but also furnish a theoretical foundation for practical field applications. Full article
(This article belongs to the Special Issue Advanced Gels for Oil Recovery (2nd Edition))
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