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: closed (20 December 2024) | Viewed by 1234

Special Issue Editors


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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
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Guest Editor
School of Engineering, Nagasaki University, Nagasaki 8528521, Japan
Interests: gas hydrate development; exploration and production technology; geological hazards and preventions

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Guest Editor

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

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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
Cited by 1 | Viewed by 785
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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