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Properties of Gas Hydrate-Bearing Sediments
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Properties of Gas Hydrate-Bearing Sediments

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 (1 March 2023) | Viewed by 4528

Special Issue Editors

Prof. Dr. Jing Ba

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Guest Editor
Department of Geology Science and Engineering, School of Earth Sciences and Engineering, Hohai University, Nanjing, China
Interests: rock physics; exploration geophysics; petroleum exploration and development
Dr. José M. Carcione

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Guest Editor
Istituto Nazionale di Oceanografa e di Geofsica Sperimentale, Sgonico, Italy
Interests: seismic wavefield modeling and simulation; seismic attenuation tomography; rock physics; exploration geophysics

Special Issue Information

Dear Colleagues,

As a kind of clean energy with the potential for huge reserves, there are challenges involved in the utilization of natural gas hydrate resources regarding their exploration, discovery, and exploitation. In spite of the research theories that have been proposed, the understanding of the internal structure of hydrates and the occurrence mode of hydrate reservoirs remains unclear, and the elastic wave propagation mechanism in the hydrate reservoirs has not been well understood in relation to the seismic exploration. In view of the complexity of actual exploration/production at present, scientific studies are making significant progresses in terms of the geological features and geophysical exploration, further revealing the lithological and geophysical characteristics of hydrate reservoirs. This Special Issue aims to share relevant scientific research on the geology and effective geophysical exploration of hydrate reservoirs and encourages the publication of the latest developments that contribute to the knowledge of hydrate reservoirs.

Prof. Dr. Jing Ba
Dr. José M. Carcione
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

  • hydrate reservoirs
  • geophysical exploration
  • lithological characteristics
  • rock physics model and theory
  • elastic wave propagation
  • seismic wave velocity and attenuation
  • occurrence mode
  • multi-scale research
  • data analysis

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Published Papers (2 papers)

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Research

17 pages, 6733 KiB  
Article
Characterizing Gas Hydrate-Bearing Marine Sediments Using Elastic Properties—Part 2: Seismic Inversion Based on a Pore-Filling–Solid Matrix Decoupling Scheme
by Zhiqi Guo, Xiaoyu Lv, Cai Liu, Haifeng Chen and Lulu Mei
J. Mar. Sci. Eng. 2022, 10(10), 1497; https://doi.org/10.3390/jmse10101497 - 14 Oct 2022
Cited by 3 | Viewed by 1605
Abstract
Characterizing gas hydrate-bearing marine sediments using seismic methods is essential for locating potential hydrate resources. However, most existing pre-stack seismic inversion methods estimate the properties of sediments containing gas hydrates without considering specific characteristics associated with gas hydrate occurrences. In the present study, [...] Read more.
Characterizing gas hydrate-bearing marine sediments using seismic methods is essential for locating potential hydrate resources. However, most existing pre-stack seismic inversion methods estimate the properties of sediments containing gas hydrates without considering specific characteristics associated with gas hydrate occurrences. In the present study, a pore-filling–solid matrix decoupling amplitude variation with offset (AVO) formula is proposed to represent seismic reflectivity in terms of properties associated with gas hydrates. Based on the rock physics relationships of solid substitution, the parameters introduced into the decoupling AVO equation estimate the concentration of gas hydrates with different occurrences, including pore fillings mixed with water and solid components forming part of the dry sediment frame. A theoretical model test indicates that seismic attributes obtained with the decoupling AVO inversion are superior to the conventional wave velocities-related properties in predicting gas hydrate saturations. A realistic model test further validates the applicability of the proposed method in characterizing a gas hydrate system with varying concentrations and layer thickness. By adjusting the tuning parameters, the configurations and concentrations of the gas hydrate system can be identified using the obtained attributes. Therefore, the presented method provides a useful tool for the characterization of gas hydrate-bearing sediments. Full article
(This article belongs to the Special Issue Properties of Gas Hydrate-Bearing Sediments)
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17 pages, 9361 KiB  
Article
Characterizing Gas Hydrate–Bearing Marine Sediments Using Elastic Properties—Part 1: Rock Physical Modeling and Inversion from Well Logs
by Zhiqi Guo, Xiaoyu Lv, Cai Liu, Haifeng Chen and Zhiguang Cai
J. Mar. Sci. Eng. 2022, 10(10), 1379; https://doi.org/10.3390/jmse10101379 - 27 Sep 2022
Cited by 8 | Viewed by 2194
Abstract
Gas hydrates are considered a potential energy source for the future. Rock physics modeling provides insights into the elastic response of sediments containing gas hydrates, which is essential for identifying gas hydrates using well-log data and seismic attributes. This paper establishes a rock [...] Read more.
Gas hydrates are considered a potential energy source for the future. Rock physics modeling provides insights into the elastic response of sediments containing gas hydrates, which is essential for identifying gas hydrates using well-log data and seismic attributes. This paper establishes a rock physics model (RPM) by employing effective medium theories to quantify the elastic properties of sediments containing gas hydrates. Specifically, the proposed RPM introduces critical gas hydrate saturation for various modeling schemes. Such a key factor considers the impact of gas hydrates on sediment stiffnesses during the dynamic process of the gas hydrate accumulating as pore fillings and part of the solid components. Theoretical modeling illustrates that elastic characteristics of the sediments exhibit distinct variation trends determined by critical gas hydrate saturation. Numerical tests of the model based on the well-log data confirm that the proposed technique can be employed to rationally predict gas hydrate saturation using the elastic properties. The compressional wave velocity model is also developed to estimate the gas hydrate saturation, which gives reliable fit results to core measurement data. The proposed methods could improve our understanding of the elastic behaviors of gas hydrates, providing a practical approach to estimating their concentrations. Full article
(This article belongs to the Special Issue Properties of Gas Hydrate-Bearing Sediments)
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