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AuthorJung, Jongwon
AuthorRyou, Jae Eun
AuthorAl-Raoush, Riyadh I.
AuthorAlshibli, Khalid
AuthorLee, Joo Yong
Available date2023-06-04T07:16:33Z
Publication Date2020
Publication NameJournal of Natural Gas Science and Engineering
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.jngse.2020.103506
URIhttp://hdl.handle.net/10576/43861
AbstractCH4-CO2 replacement has been considered as a method for methane production from hydrate-bearing sediments to maintain sediment stability. Sediment stability has been studied at both the particle scale and mesoscale. However, the shear stiffness of sediments has not yet been explored. Moreover, the effects of CO2 and CO2-N2 mixtures as injection fluids on sediment stability remain unclear. Thus, this study aimed to determine the variations in shear wave velocity and electrical resistivity during hydrate formation, CH4-CO2 replacement, and hydrate dissociation using two types of injecting fluids (CO2 and CO2-N2 mixture). The results demonstrated that hydrate-bearing sediment could maintain its stability during CH4-CO2 replacement by injecting CO2 or CO2-N2 mixture. Furthermore, injecting CO2-N2 mixture was more efficient for methane production than injecting CO2. The Results also revealed that injecting CO2-N2 mixture could lead to higher stability of sediments during CH4-CO2 replacement than injecting CO2, although the difference in sediment stability was small between the two cases. 2020 The Author(s)
SponsorThis research was mainly supported by NPRP grant #NPRP8-594-2-244 from the Qatar National Research Fund (a member of the Qatar Foundation ). This research was partially supported by the Ministry of Trade, Industry, and Energy ( MOTIE ) through the Project "Gas Hydrate Exploration and Production Study (20-1143)" under the management of the Gas Hydrate Research and Development Organization (GHDO) of Korea and the Korea Institute of Geoscience and Mineral Resources ( KIGAM ). This research is also supported by "Study on Submarin Active Faults and Evaluation of Possibility of Submarine Earthquakes in the Southern Part of the East Sea, Korea (20-9850)" of the Ministry of Ocean and Fisheries. The findings achieved herein are solely the responsibility of the authors.
Languageen
PublisherElsevier
SubjectAcoustic wave velocity
Electric conductivity
Gas hydrates
Hydration
Methane
Mixtures
Sediments
Shear flow
Shear waves
Stability
Wave propagation
Hydrate bearing sediments
Hydrate dissociation
Hydrate formation
Injection fluids
Methane production
Sediment stability
Shear stiffness
Shear wave velocity
Carbon dioxide
TitleEffects of CH4-CO2 replacement in hydrate-bearing sediments on S-wave velocity and electrical resistivity
TypeArticle
Volume Number82
dc.accessType Open Access


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