Key Points and Current Studies on Seepage Theories of Marine Natural Gas Hydrate-Bearing Sediments: A Narrative Review

The internal fluid flow capacity of hydrate-bearing sediment (HBS) is one of the important factors affecting the efficiency of natural gas exploitation. This paper focuses on seepage studies on gas hydrates with the following contents: scope of theories' application, normalized permeability (K-...

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Bibliographic Details
Published in:Energies
Main Authors: Peng, Hao, Li, Xiaosen, Chen, Zhaoyang, Zhang, Yu, You, Changyu
Format: Report
Language:English
Published: MDPI 2022
Subjects:
natural gas hydrate
permeability
pore characteristics
porous media
multiphase flow
challenges and prospects
POROUS-MEDIA
RELATIVE PERMEABILITY
METHANE HYDRATE
HYDRAULIC CONDUCTIVITY
VISUAL OBSERVATION
NUMERICAL-ANALYSIS
NETWORK MODEL
FLOW
WATER
DISSOCIATION
Energy & Fuels
Methane hydrate
Online Access:http://ir.giec.ac.cn/handle/344007/37044
https://doi.org/10.3390/en15144952
Description
Summary:The internal fluid flow capacity of hydrate-bearing sediment (HBS) is one of the important factors affecting the efficiency of natural gas exploitation. This paper focuses on seepage studies on gas hydrates with the following contents: scope of theories' application, normalized permeability (K-t) models, extension combined with new technology, and development. No review has elucidated the prediction of original permeability (K-0) of sediments without hydrates. Moreover, there are few studies on seepage theories with new technologies, such as Computed Tomography (CT), Nuclear Magnetic Resonance (NMR), Magnetic Resonance Imaging (MRI), and resistivity. However, this review summarizes the prospects, evolution, and application of HBS seepage theories from the perspectives of experiments, numerical simulation, and microscopic visualization. Finally, we discuss the current limitations and directions of the seepage theories of HBS.

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