Advances in Marine Gas Hydrate Exploration and Discovery

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

Deadline for manuscript submissions: 1 September 2024 | Viewed by 1418

Special Issue Editors

Sanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, Sanya, China
Interests: gas hydrate; marine and petroleum geology

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Guest Editor
Sanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, Sanya, China
Interests: natural gas hydrate; oil and gas; geophysical exploration

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Guest Editor
Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China
Interests: marine geophysics; gas hydrate

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Guest Editor
National Engineering Research Center of Gas Hydrate Exploration and Development, Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou, China
Interests: gas hydrate; environmental influence; geochemistry

Special Issue Information

Dear Colleagues,

Natural gas hydrate has been widely accepted as a clean energy with great potential. Some countries, with powerful technology, especially those that have strong demands for fossil fuels, have put extensive efforts into conducting studies on the exploration and development of gas hydrate surrounding continental margins. The academic and industrial communities have also paid enthusiastic attention by conducting studies concerning the mechanism of hydrate accumulation and how it affects resources and the environment. In recent years, breakthroughs in gas hydrate exploration have been made in many regions around the world, showing good prospects in terms of exploration and development. However, the mechanisms of hydrate accumulation, resource evaluation, and environmental impacts have still not been fully answered, which restricts the exploitation and utilization of hydrate resources and necessitates further research.

The aim of this Special Issue is to advance research on gas hydrate exploration and discovery in continental margins, with an emphasis on the mechanism of accumulation and the assessment of marine hydrate's environmental and resource benefits. Papers on the following topics are welcome: gas hydrate exploration, exploration theory and technology, the distribution and occurrence of hydrates in nature, resource appraisal techniques and technology, environmental monitoring, and the relationship between hydrates and climate change. Both review and research papers are welcome to be submitted.

Topics of interest for this Special Issue include, but are not limited to, the following:

  1. Geological, geophysical, and geochemical method for the exploration of gas hydrate;
  2. Dynamic gas hydrate system and methane recycling;
  3. Hydrate occurrence associated with cold seeps;
  4. Resource evaluation and prediction methods;
  5. Environmental monitoring and evaluation of the gas hydrate system;
  6. The interaction between climate change and the gas hydrate system;
  7. New technology and applications in gas hydrate exploration.

Dr. Wei Zhang
Prof. Dr. Pibo Su
Dr. Jiliang Wang
Prof. Dr. Qianyong Liang
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

  • gas hydrate system
  • resource evaluation and prediction
  • accumulation mechanism
  • environmental monitoring and evaluation

Published Papers (2 papers)

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Research

20 pages, 6752 KiB  
Article
Controls on Deep and Shallow Gas Hydrate Reservoirs in the Dongsha Area, South China Sea: Evidence from Sediment Properties
by Chenyang Bai, Hongbin Wang, Qing Li, Yu Zhang and Xiaolei Xu
J. Mar. Sci. Eng. 2024, 12(5), 696; https://doi.org/10.3390/jmse12050696 - 23 Apr 2024
Viewed by 271
Abstract
The Dongsha area, a key region in the northern South China Sea (SCS), features both diffusive deep and seepage shallow gas hydrate reservoirs. Utilizing sediment samples from gas hydrate reservoirs and adjacent layers at sites W08 and W16 in the Dongsha area, this [...] Read more.
The Dongsha area, a key region in the northern South China Sea (SCS), features both diffusive deep and seepage shallow gas hydrate reservoirs. Utilizing sediment samples from gas hydrate reservoirs and adjacent layers at sites W08 and W16 in the Dongsha area, this study aims to uncover the sediment property differences between deep and shallow gas hydrate reservoirs and their impact on gas hydrate accumulation through grain size, X-ray diffraction, and specific surface area (SSA) analyses. The findings classify the study intervals into four distinct layers: shallow non-gas hydrate layer (shallow-NGHL), shallow gas hydrate reservoir (shallow-GHR), deep non-gas hydrate layer (deep-NGHL), and deep gas hydrate reservoir (deep-GHR). In the clayey silt sediment reservoirs, grain size has a minor influence on gas hydrate reservoirs. Both shallow and deep NGHLs, characterized by high smectite content and SSA, possess a complex structure that impedes gas and fluid migration and offers limited potential reservoir space. Consequently, both shallow and deep NGHLs function as sealing beds. The deep GHR, having low smectite content and SSA, exhibits a strong capacity for gas and fluid migration and greater potential reservoir space. As a result, sediment properties significantly influence the deep GHR. Seepage primarily controls the shallow GHR. Full article
(This article belongs to the Special Issue Advances in Marine Gas Hydrate Exploration and Discovery)
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16 pages, 8834 KiB  
Article
Mechanical Characteristics of Gas Hydrate-Bearing Sediments: An Experimental Study from the South China Sea
by Qingmeng Yuan, Liang Kong, Qianyong Liang, Jinqiang Liang, Lin Yang, Yifei Dong, Zhigang Wang and Xuemin Wu
J. Mar. Sci. Eng. 2024, 12(2), 301; https://doi.org/10.3390/jmse12020301 - 08 Feb 2024
Cited by 1 | Viewed by 723
Abstract
Clarifying the mechanical characteristics of gas hydrate-bearing sediments (GHBS) from a mechanical perspective is crucial for ensuring the long-term, safe, and efficient extraction of natural gas hydrates. In this study, seabed soft clay from the northern South China Sea was utilized to prepare [...] Read more.
Clarifying the mechanical characteristics of gas hydrate-bearing sediments (GHBS) from a mechanical perspective is crucial for ensuring the long-term, safe, and efficient extraction of natural gas hydrates. In this study, seabed soft clay from the northern South China Sea was utilized to prepare clayey silt samples, aligning with gradation curves related to hydrate extraction projects in the Shenhu area of the South China Sea. Utilizing the high-pressure low-temperature hydrate triaxial testing system (ETAS), twelve sets of triaxial shear tests were conducted. The results highlight that increases in hydrate saturation and confining pressure significantly enhance GHBS’ strength and stiffness, with more pronounced volume expansion observed during shearing. These tests have elucidated the mechanical responses of GHBS. Subsequently, empirical formulas were developed to characterize their properties under varying conditions. Additionally, based on the experimental data, the micro-mechanisms of GHBS were analyzed, suggesting that hydrates notably contribute to the filling and cementing effects in GHBS, with these effects varying with changes in hydrate saturation and confining pressure. This study contributes to a deeper understanding of the fundamental mechanical properties of GHBS. Full article
(This article belongs to the Special Issue Advances in Marine Gas Hydrate Exploration and Discovery)
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