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Key Technologies for Natural Gas Hydrate Development and Carbon Capture and Storage

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

Deadline for manuscript submissions: closed (25 May 2023) | Viewed by 5503

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Prof. Dr. Yuhe Wang

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Guest Editor

1. National and Local Joint Laboratory for Bigdata Analysis and Computing Technology, CAS, Beijing 100086, China
2. Institute for Scientific Computation, Texas A&M University, College Station, TX 77843, USA
Interests: static and dynamic system modeling; machine learning; data driven methods; process automation

Dr. Chiyu Xie

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Guest Editor

School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Interests: multiphase flow in porous media; non-newotnian fluids; Lattice Boltzmann modeling; microfluidics
Special Issues, Collections and Topics in MDPI journals

Dr. Jiulong Wang

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Department of Big Data Technology and Application Development, Computer Network Information Center of Chinese Academy of Sciences, Beijing 101499, China
Interests: data analytics and intelligence; reservoir numerical modeling and simulation; unconventional oil and gas development

Special Issue Information

Dear Colleagues,

Gas hydrates account for one-third of the mobile organic carbon on Earth and exist in a wide variety of forms. Due to the wide distribution, large reserves, high density, and high calorific value of natural gas hydrate (NGH), it is considered a promising and innovative clean energy resource to replace fossil energy in the future. The rapid transition of the global energy supply from oil-based resources to natural gas-based resources offers great opportunities for the use of NGH. Hydrate-based technologies, including CO2 capture, CO2 separation, and natural gas storage and transportation, can also be used to reduce greenhouse gas (CO2, CH4) emissions and achieve carbon neutrality. As a carbon storage reservoir in the carbon cycle, NGH can be developed by using many technologies similar to those in petroleum engineering. Advances in imaging processes, pore-scale simulations, micromodel and microfluidics, multiscale modeling, artificial intelligence, and other technologies continuously provide new insights into the occurrence and release of NGH and promoting the processes of carbon capture and storage (CCS).
Therefore, the purpose of this Special Issue is to solicit contributions on all aspects of technologies related to natural gas hydrate and carbon capture and storage. Topics of interest for publication include, but are not limited to:

Pore-scale modeling of NGH release or CCS
Imaging technologies for NGH transportation or CCS
Micromodel experiments on NGH transportation or CCS
Logging technologies to evaluate the occurrence of NGH
New physical insights of NGH CCS
Reservoir-scale simulation of NGH development
Artificial intelligence in petroleum engineering
Application of NGH in carbon cycling

Prof. Dr. Yuhe Wang
Dr. Chiyu Xie
Dr. Jiulong Wang
Guest Editor

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Keywords

natural gas hydrate
carbon capture and storage (CCS)
pore-scale modeling
imaging technologies
micromodel experiments
reservoir-scale simulation
artificial intelligence

Published Papers (3 papers)

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Research

16 pages, 4506 KiB

Open AccessArticle

Effect of Residual Water in Sediments on the CO₂-CH₄ Replacement Process

by Fuqin Lu, Xuebing Zhou, Caili Huang, Dongliang Li and Deqing Liang

Energies 2023, 16(7), 3154; https://doi.org/10.3390/en16073154 - 31 Mar 2023

Cited by 2 | Viewed by 1204

Abstract

CO₂ replacement is a promising method of gas hydrate recovery. However, the influence of residual water in the replacement process and selections of a suitable mining area remain uncertain. To better understand this method, we examined the influence of the particle size and initial hydrate saturation on the replacement process while using the same amount of residual free water. The results showed that during the replacement process, two stages of rapid reaction and slow reaction occurred, which were manifested by the speed of pressure change in the reactor. The CO₂ sequestration ratio decreased with the increase in sediment particle size and increased with the increase in initial hydrate saturation. During the replacement process, two reactions occurred: CH₄ was replaced by CO₂ and CO₂ hydrate was formed, and the replacement amount and recovery efficiency of CH₄ increased with a decrease in sediment particle size. When the sediment particle size was less than 166 μm, the CH₄ recovery efficiency was significantly affected by the particle size. The replacement amount of CH₄ increased with the increase in initial hydrate saturation, and the recovery efficiency decreased. This study provides a basis for selecting suitable hydrate-accumulation areas for on-site mining. Full article

(This article belongs to the Special Issue Key Technologies for Natural Gas Hydrate Development and Carbon Capture and Storage)

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15 pages, 5088 KiB

Open AccessArticle

A Microfluidic Experiment on CO₂ Injection for Enhanced Oil Recovery in a Shale Oil Reservoir with High Temperature and Pressure

by Zhengdong Lei, Yishan Liu, Rui Wang, Lei Li, Yuqi Liu and Yuanqing Zhang

Energies 2022, 15(24), 9461; https://doi.org/10.3390/en15249461 - 14 Dec 2022

Cited by 4 | Viewed by 1920

Abstract

In recent years, CO₂ huff and puff has become one of the most important methods developed for unconventional shale oil reservoirs and has been widely used in all major shale oil fields. However, the microscopic mechanism of CO₂ contacting with crude oil is complex, and the change law of the residual oil occurrence after CO₂ injection is unclear. In this paper, a micro visualization fluid flow simulation experiment (microfluidic experiment) under high temperatures and high pressure of a shale reservoir was conducted to reveal the micro mechanism of CO₂ and crude oil after contact at the microscale. This allows conclusion of more precise results than any experiment conducted in a room environment. Combined with gas–oil two-phase micro flow characteristics, the production mechanisms of crude oil by CO₂ huff and puff at the pore scale are clarified, and the change characteristics of the remaining oil occurrence state after CO₂ injection are quantified. The results show that CO₂ mainly produces crude oil in macropores and microfractures in the injection stage of huff and puff, improves the mobility of crude oil through diffusion dissolution in the soaking stage, and that the driving of dissolved gas is dominant in depressurization production. The major micro-mechanisms for CO₂ to improve shale oil are extraction and dissolution expansion, accompanied by a variety of secondary mechanisms, such as the miscibility effect, oil expansion, viscosity reduction and other contact effects, as well as the improvement of crude oil properties. The simulation results of huff and puff development show that soaking is an important stage to enhance oil recovery. With increasing soaking time or the soaking pressure, the recovery degree of crude oil will increase positively. Full article

(This article belongs to the Special Issue Key Technologies for Natural Gas Hydrate Development and Carbon Capture and Storage)

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12 pages, 2063 KiB

Open AccessArticle

Nitrogen Atom-Doped Layered Graphene for High-Performance CO₂/N₂ Adsorption and Separation

by Weifeng Lyu, Linghui Sun, Lu Wang, Zemin Ji, Sainan Zhou, Yong Chen and Xiaoqing Lu

Energies 2022, 15(10), 3713; https://doi.org/10.3390/en15103713 - 18 May 2022

Cited by 5 | Viewed by 1739

Abstract

The development of high-performance CO₂ capture and separation adsorbents is critical to alleviate the deteriorating environmental issues. Herein, N atom-doped layered graphene (N-MGN) was introduced to form triazine and pyridine as potential CO₂ capture and separation adsorbents via regulation of interlayer spacings. Structural analyses showed that accessible surface area of the N-MGN is 2521.72 m² g⁻¹, the porosity increased from 9.43% to 84.86%. At ultra-low pressure, N-MGN_6.8 have exhibited a high CO₂ adsorption capacity of 10.59 mmol/g at 298 K and 0.4 bar. At high pressure, the absolute adsorption capacities of CO₂ in N-MGN_17.0 (40.16 mmol g⁻¹) at 7.0 MPa and 298 K are much larger than that of N-doping slit pore. At 298 K and 1.0 bar, the highest selectivity of CO₂ over N₂ reached up to ~133 in N-MGN_6.8. The research shows that N doping can effectively improve the adsorption and separation capacity of CO₂ and N₂ in layered graphene, and the interlayer spacing has an important influence on the adsorption capacity of CO₂/N₂. The adsorption heat and relative concentration curves further confirmed that the layered graphene with an interlayer spacing of 6.8 Å has the best adsorption and separation ability of CO₂ and N₂ under low pressure. Under high pressure, the layered graphene with the interlayer spacing of 17.0 Å has the best adsorption and separation ability of CO₂ and N₂. Full article

(This article belongs to the Special Issue Key Technologies for Natural Gas Hydrate Development and Carbon Capture and Storage)

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