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Advances in Pore Structure Characterization and Flow Modelling of Shale...
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Advances in Pore Structure Characterization and Flow Modelling of Shale Oil Reservoir

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

Deadline for manuscript submissions: closed (17 February 2023) | Viewed by 2820

Special Issue Editors

Dr. Wenhui Song

E-Mail Website
Guest Editor
School of Petroleum Engineering, China University of Petroleum (East China), Beijing, China
Interests: shale oil and gas reservoir simulation; digital rock; fluid flow in porous media
Dr. Guangpu Zhu

E-Mail Website
Guest Editor
Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
Interests: pore-scale flow modelling; phase-field modelling; reinforcement learning
Dr. Yanyong Wang

E-Mail Website
Guest Editor
College of Energy, Chengdu University of Technology, Chengdu, China
Interests: reservoir simulation; fracture modelling; CO2 storage; deep learning

Special Issue Information

Dear Colleagues,

It is our pleasure to announce this Special Issue on Advances in Pore Structure Characterization and Flow Modelling of Shale Oil Reservoir and to encourage you to contribute to this topic.

The heterogeneities of shale oil reservoir pore system are expressed in terms of complex pore structure, different pore type and multi-scale pore size. Fluid transport mechanisms and occurrence behavior in shale oil nanopore space notably differ from that in conventional reservoir. The traditional laboratory core experimental methods are not applicable to shale because of the long measuring time. Accurate petro-physical properties are consequently not available for macro scale shale oil production simulation and the realistic fluid flow patterns in shale oil reservoir are still unknown to a large extent. On the other hand, the hydraulic fracturing enables the higher productivity of shale oil reservoir and the numerical simulation method of multiphase multi-component flow in fractured shale is a hot research topic.

The purpose of this special issue is to provide the recent advances on pore structure characterization and flow modelling of shale oil reservoir. Topics of interest for publication include, but are not limited to:

  • Shale pore structure characterization
  • Digital rock physics
  • Multi scale modelling method
  • Phase equilibrium modelling
  • Multiphase multi-component Flow
  • Fracture propagation
  • Geomechanics modelling
  • Deep learning based reservoir simulation
  • CO2 injection and storage
  • Shale oil production simulation

Dr. Wenhui Song
Dr. Guangpu Zhu
Dr. Yanyong Wang
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

  • shale pore structure
  • shale oil
  • digital rock
  • phase equilibrium
  • multiphase flow
  • fracture
  • geomechanics
  • deep learning
  • CO2

Published Papers (2 papers)

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Research

9 pages, 2078 KiB  
Article
Shale Microstructure Characteristics under the Action of Supercritical Carbon Dioxide (Sc-CO2)
by Chunsheng Yu, Xiao Zhao, Qi Jiang, Xiaosha Lin, Hengyuan Gong and Xuanqing Chen
Energies 2022, 15(22), 8354; https://doi.org/10.3390/en15228354 - 9 Nov 2022
Cited by 5 | Viewed by 1127
Abstract
Supercritical carbon dioxide (SC-CO2) is suitable to extract low-polar organics and to assist in the dissolution of pores and fractures in shale. In this work, we investigate the effect of temperature on the structure of five shale samples via high pressure [...] Read more.
Supercritical carbon dioxide (SC-CO2) is suitable to extract low-polar organics and to assist in the dissolution of pores and fractures in shale. In this work, we investigate the effect of temperature on the structure of five shale samples via high pressure reaction assisted with SC-CO2. Shale samples were analyzed using X-ray diffraction, field emission scanning electron microscopy, and ImageJ software. Due to the extraction of CO2, after Sc-CO2 treatment, carbonate and clay content decreased, while quartz and plagioclase increased slightly, which improved gas and oil flow in microscopic pores and shale cracks. Shale samples showed an increase in surface fracture area as experimental temperature increased. Since Sc-CO2 fluid density and solubility increase with temperature, more organics can be extracted from shale pores and fractures, resulting in newly formed pores and fractures. As a result, the threshold temperature for shale high-temperature Sc-CO2 cracking was confirmed to be 400 °C, and the fracture area increased by more than 45% at this temperature. Based on the findings of this study, Sc-CO2 technology can be used to potentially recover low-maturity shale oil efficiently. Full article
(This article belongs to the Special Issue Advances in Pore Structure Characterization and Flow Modelling of Shale Oil Reservoir)
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20 pages, 13508 KiB  
Article
Numerical Simulation of Well Type Optimization in Tridimensional Development of Multi-Layer Shale Gas Reservoir
by Tao Huang, Xin Liao, Zhaoqin Huang, Fuquan Song and Renyi Wang
Energies 2022, 15(18), 6529; https://doi.org/10.3390/en15186529 - 7 Sep 2022
Cited by 1 | Viewed by 1381
Abstract
Aimed at the development of shale gas reservoirs with large reservoir thickness and multiple layers, this paper carried out a numerical simulation study on the optimization of three different well types: horizontal well, deviated well, and vertical well. To make the model more [...] Read more.
Aimed at the development of shale gas reservoirs with large reservoir thickness and multiple layers, this paper carried out a numerical simulation study on the optimization of three different well types: horizontal well, deviated well, and vertical well. To make the model more in line with the characteristics of shale gas reservoirs, a two-phase gas–water seepage mathematical model of shale gas reservoirs was established, considering the adsorption and desorption of shale gas, Knudsen diffusion effect, and stress sensitivity effect. The embedded discrete fracture model was used to describe hydraulic fracture and natural fracture. Based on Fortran language, a numerical simulator for multi-layer development of shale gas reservoirs was compiled, and the calculation results were compared with the actual production data of Barnett shale gas reservoirs to verify the reliability of the numerical simulator. The spread range of hydraulic fractures in the reservoir with different natural fracture densities is calculated by the simulation to determine well spacing and fracture spacing. The orthogonal experimental design method is then used to optimize the best combination of well spacing and fracture spacing for different well types. The results show that the well productivity of the high-density (0.012 m/m2) natural fractures reservoir > the well productivity of the medium-density (0.006 m/m2) natural fractures reservoir > the well productivity of the low-density (0.001 m/m2) natural fractures reservoir. According to the design of the orthogonal test, it can be seen that the most significant factor affecting the productivity of horizontal wells is the fracture spacing in the Y direction. For deviated wells and vertical wells, the X-direction well spacing has the greatest impact on its productivity. Full article
(This article belongs to the Special Issue Advances in Pore Structure Characterization and Flow Modelling of Shale Oil Reservoir)
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