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Energies
Special Issues
Unconventional Oil & Gas Reservoir Seepage and Enhanced Oil Recovery
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Unconventional Oil & Gas Reservoir Seepage and Enhanced Oil Recovery

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H1: Petroleum Engineering".

Deadline for manuscript submissions: closed (14 February 2023) | Viewed by 4641

Special Issue Editors

Dr. Xiuyu Wang

E-Mail Website
Guest Editor
School of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
Interests: reservoir physics; enhanced oil recovery techniques
Dr. Xiao Wang

E-Mail Website
Guest Editor
College of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu, China
Interests: low salinity waterflooding, CO2 EOR and storage, oil viscosity reduction
Dr. Guowei Qin

E-Mail Website
Guest Editor
College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
Interests: enhanced oil recovery techniques

Special Issue Information

Dear Colleagues,

We are pleased to invite you to submit papers to the journal Energies for a Special Issue that will be entirely devoted to “Unconventional Oil & Gas Reservoir Seepage Mechanism and Enhanced Oil Recovery”. The Special Issue will expand on essential technical challenges for improving the understanding and management of these unconventional reservoirs. This Special Issue will serve as an excellent channel for sharing information and lessons learned, collected from different plays.

The challenge laid in producing hydrocarbon from low permeability reservoirs, tight reservoirs, shale reservoirs, oil sands and heavy oil is justifying the necessity of more research being done regarding the fluid flowing mechanisms and enhanced oil recovery methods. This issue will seek to ignite contrasting perspectives towards optimal unconventional oil and gas reservoir management.

Potential topics of interest include, but are not limited to:

  • Advances in seepage mechanisms of low permeability, tight reservoir and shale reservoir, as well as in oil sands and heavy oil reservoirs.
  • Reservoir damage analysis and evaluation of unconventional reservoirs during production.
  • Analysis of interfacial phenomena of rocks with drilling, injected, or in situ fluids for unconventional reservoirs.
  • Novel technologies and production methods research in hydrocarbon production from unconventional reservoirs.
  • Machine learning and data science applications for unlocking new insights in unconventional resources exploitation.

Dr. Xiuyu Wang
Dr. Xiao Wang
Dr. Guowei Qin
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. 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

  • spontaneous imbibition
  • tight oil reservoir
  • shale gas reservoir
  • heavy oil reservoir
  • oil sand
  • water huff and puff
  • chemical flooding
  • hydraulic fracturing

Published Papers (3 papers)

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Research

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13 pages, 6249 KiB  
Article
Investigation on Swelling Performance of Oil Sands and Its Impact on Oil Production during SAGD Processes
by Xiuyu Wang, Chuanying Zhang and Guorui Sun
Energies 2022, 15(18), 6744; https://doi.org/10.3390/en15186744 - 15 Sep 2022
Cited by 1 | Viewed by 1062
Abstract
SAGD (Steam Assisted Gravity Drainage) is used in Canadian fields where there are interlayers that impede steam chamber development and thus impede production. Many experiments have been conducted on the effect of interlayers on oil recovery. However, the swelling characteristics of interlayers under [...] Read more.
SAGD (Steam Assisted Gravity Drainage) is used in Canadian fields where there are interlayers that impede steam chamber development and thus impede production. Many experiments have been conducted on the effect of interlayers on oil recovery. However, the swelling characteristics of interlayers under different conditions, as well as the possible clay mineral transformation and particle migration of clay particles at high temperatures, are rarely studied. In this paper, the swelling characteristics of natural oil sands and artificial clay samples were studied by high temperature hydration swelling experiments to obtain a better comparison. The effects of temperature, pressure and solution type on the swelling rate of oil sand were studied. The uniaxial compressive strength of the core in the presence of clay was studied by the scribe test. In addition, before and after the aging test at 220 °C and 2.5 MPa, the clay mineral composition was studied by the X-ray diffraction method, and the mineral transformation was proved. Finally, the impact of clay swelling on oil production is investigated by simulating the particle migration effect while considering the swelling effect. The results show that the swelling rate of oil sand increases with the increment of temperature and the decrement of pressure. The swelling rate of an artificial clay sample in distilled water is the highest, while a 1% KCl + 1% CaCl2 solution has the best swelling inhibition effect. This study aims to provide new insights into reservoir damage research during SAGD development. Full article
(This article belongs to the Special Issue Unconventional Oil & Gas Reservoir Seepage and Enhanced Oil Recovery)
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14 pages, 3623 KiB  
Article
Controlling the Hydro-Swelling of Smectite Clay Minerals by Fe(III) Reducing Bacteria for Enhanced Oil Recovery from Low-Permeability Reservoirs
by Kai Cui, Chengjun Wang, Li Li, Jungang Zou, Weihong Huang, Zhongzhi Zhang, Heming Wang and Kun Guo
Energies 2022, 15(12), 4393; https://doi.org/10.3390/en15124393 - 16 Jun 2022
Cited by 3 | Viewed by 1521
Abstract
The hydro-swelling of smectite clay minerals in low-permeability reservoirs further decreases the reservoir permeability and results in low oil recovery. Currently, the traditional chemical anti-swelling agents are widely used, but most of them are only effective in the short term and are not [...] Read more.
The hydro-swelling of smectite clay minerals in low-permeability reservoirs further decreases the reservoir permeability and results in low oil recovery. Currently, the traditional chemical anti-swelling agents are widely used, but most of them are only effective in the short term and are not environmentally friendly. Here, we report the use of Fe(III) reducing microorganisms (FeRM) as a novel green anti-swelling agent to enhance oil recovery from low-permeability reservoirs. The results showed that FeRM (Proteus hauserifective) inhibited/reduced the hydro-swelling of smectite clay minerals through a three-step biochemical mineralization reaction process. The structural Fe(III) reduction in minerals by FeRM can be an important driving force for illitization. The maximum inhibition efficiency (36.6%) and shrinkage efficiency (69.3%) were achieved at 35 °C and 0.1 Mpa. Furthermore, core displacement tests showed that FeRM reduced the waterflooding injection pressure by 61.1%, increased the core permeability by 49.6%, and increased the oil recovery by 8.1%. Finally, the mechanism of FeRM-enhanced oil recovery was revealed. This study demonstrates that using FeRM to inhibit/reduce the hydro-swelling of clay minerals holds great potential to enhance the oil recovery from low-permeability reservoirs. Full article
(This article belongs to the Special Issue Unconventional Oil & Gas Reservoir Seepage and Enhanced Oil Recovery)
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Review

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19 pages, 2894 KiB  
Review
A Review of the Seepage Mechanisms of Heavy Oil Emulsions during Chemical Flooding
by Xiuyu Wang, Fuqiong Wang, Mohanad A. M. Taleb, Zhiyuan Wen and Xiulin Chen
Energies 2022, 15(22), 8397; https://doi.org/10.3390/en15228397 - 10 Nov 2022
Cited by 9 | Viewed by 1509
Abstract
Chemical flooding plays an important role in enhancing oil recovery due to many reasons, including the viscosity-increment effect of polymer, wettability alteration effect of surfactant, and the formation of emulsions, which have been known to effectively increase the swept area and oil displacement [...] Read more.
Chemical flooding plays an important role in enhancing oil recovery due to many reasons, including the viscosity-increment effect of polymer, wettability alteration effect of surfactant, and the formation of emulsions, which have been known to effectively increase the swept area and oil displacement efficiency, hence increasing heavy oil recovery. Laboratory tests and pilot trials of alkali–surfactant–polymer (ASP) injection show that the oil recovery of the emulsified system is 5% more than the cases where no emulsions existed. Therefore, it is of great significance to study heavy oil emulsions and its field application for enhanced heavy oil recovery. This paper discusses a thorough overview of the most fundamental ASP flooding mechanisms, along with some examples of laboratory experiments and field trials. In addition, the formation conditions and the interfacial characteristics of heavy oil emulsions are also discussed, mainly ASP flooding, and then the seepage mechanisms of these emulsions are investigated. The relationship between the formation of heavy oil emulsions and the enhanced heavy oil recovery effect by chemical flooding is discussed through core flooding experiments at the reservoir temperature and some field pilots to reach the optimum heavy oil recovery. Full article
(This article belongs to the Special Issue Unconventional Oil & Gas Reservoir Seepage and Enhanced Oil Recovery)
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