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JMSE
Special Issues
Exploration and Drilling Technology of Deep-Sea Natural Gas Hydrate
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Exploration and Drilling Technology of Deep-Sea Natural Gas Hydrate

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Geological Oceanography".

Deadline for manuscript submissions: 20 December 2024 | Viewed by 1074

Special Issue Editors

Prof. Dr. Hengjie Luan

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Guest Editor
College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Interests: gas hydrate development; mechanical properties of gas hydrate-bearing sediments; numerical and experimental methods
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yujing Jiang

E-Mail Website
Guest Editor
School of Engineering, Nagasaki University, Nagasaki 8528521, Japan
Interests: gas hydrate development; exploration and production technology; geological hazards and preventions
Prof. Dr. Xuezhen Wu

E-Mail Website
Guest Editor
College of Civil Engineering, Fuzhou University, Fuzhou 350108, China
Interests: gas hydrate development; production technology; numerical modelling
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With growing energy demands and the gradual depletion of traditional energy sources, deep-sea natural gas hydrates have become a research area of great concern. In recent decades, research on deep-sea natural gas hydrates has made great progress in terms of formation mechanism, distribution, exploration technology, and drilling technology. This Special Issue aims to consolidate the latest advancements in this field. Authors are encouraged to present cutting-edge research that addresses current challenges in deep-sea natural gas hydrate exploration and drilling. We are looking for original research articles, reviews, and technical notes that contribute to the discourse on the advancement of exploration and drilling technologies used for deep-sea natural gas hydrates.

Prof. Dr. Hengjie Luan
Prof. Dr. Yujing Jiang
Prof. Dr. Xuezhen Wu
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. Journal of Marine Science and Engineering 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

  • deep-sea natural gas hydrate
  • exploration technologies
  • drilling advancements
  • gas production
  • physical properties
  • multidisciplinary research
  • thermo-hydro-mechanical–chemical coupling
  • environmental considerations
  • geological hazard

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Published Papers (1 paper)

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Research

18 pages, 10772 KiB  
Article
Properties and Model of Pore-Scale Methane Displacing Water in Hydrate-Bearing Sediments
by Dongfeng Ge, Jicheng Zhang, Youxun Cao, Cheng Liu, Bin Wu, Haotian Chu, Jialin Lu and Wentao Li
J. Mar. Sci. Eng. 2024, 12(8), 1320; https://doi.org/10.3390/jmse12081320 - 5 Aug 2024
Viewed by 683
Abstract
The flow characteristics of methane and water in sedimentary layers are important factors that affect the beneficial exploitation of marine hydrates. To study the influencing factors of methane drive-off water processes in porous media, we constructed nonhomogeneous geometric models using MATLAB 2020a random [...] Read more.
The flow characteristics of methane and water in sedimentary layers are important factors that affect the beneficial exploitation of marine hydrates. To study the influencing factors of methane drive-off water processes in porous media, we constructed nonhomogeneous geometric models using MATLAB 2020a random distribution functions. We developed a mathematical model of gas–water two-phase flow based on the Navier–Stokes equation. The gas-driven water processes in porous media were described using the level-set method and solved through the finite element method. We investigated the effects of the nonhomogeneous structure of pore media, wettability, and repulsion rate on gas-driven water channeling. The nonhomogeneity of the pore medium is the most critical factor influencing the flow. The size of the throat within the hydrophilic environment determines the level of difficulty of gas-driven water flow. In regions with a high concentration of narrow passages, the formation of extensive air-locked areas is more likely, leading to a decrease in the efficiency of the flow channel. In the gas–water drive process, water saturation changes over time according to a negative exponential function relationship. The more hydrophilic the pore medium, the more difficult the gas-phase drive becomes, and this correlation is particularly noticeable at higher drive rates. The significant pressure differentials caused by the high drive-off velocities lead to quicker methane breakthroughs. Instantaneous flow rates at narrow throats can be up to two orders of magnitude higher than average. Additionally, there is a susceptibility to vortex flow in the area where the throat connects to the orifice. The results of this study can enhance our understanding of gas–water two-phase flow in porous media and help commercialize the exploitation of clean energy in the deep ocean. Full article
(This article belongs to the Special Issue Exploration and Drilling Technology of Deep-Sea Natural Gas Hydrate)
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