2015
DOI: 10.1016/j.marpetgeo.2015.02.021
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Effect of methane hydrate morphology on compressional wave velocity of sandy sediments: Analysis of pressure cores obtained in the Eastern Nankai Trough

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Cited by 69 publications
(45 citation statements)
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“…In contrast, the hydrate saturation of CH 4 purge LN2 cores is in the range of values inferred by analyzing pressure cores (Konno et al, 2015a;Suzuki et al, 2015). In addition, there are no fractures or cracks in these cores; thus, the procedure must have had little effect on the soil skeleton.…”
Section: Index Propertiesmentioning
confidence: 86%
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“…In contrast, the hydrate saturation of CH 4 purge LN2 cores is in the range of values inferred by analyzing pressure cores (Konno et al, 2015a;Suzuki et al, 2015). In addition, there are no fractures or cracks in these cores; thus, the procedure must have had little effect on the soil skeleton.…”
Section: Index Propertiesmentioning
confidence: 86%
“…The in-situ hydrate saturations in the table were calculated using the P-wave velocity. Konno et al (2015a) measured the hydrate saturation of pressure core sediments that were recovered as part of the same project, and conducted a comparison with the P-wave velocity measured by PCATS . From the results, the morphology of the hydrate in the sediments was assumed to be the load-bearing type, and the hydrate saturations were estimated.…”
Section: Index Propertiesmentioning
confidence: 99%
“…For the same GH saturation, the predicted material properties, (in particular the seismic and electrical response and the permeation behavior) vary considerably with the chosen microstructural model. Experimentally observed seismic velocities suggest that the actually adopted microstructure in a fully water‐saturated regime changes with GH saturation [ Dai et al ., ; Konno et al ., ; Zhang et al ., ] ranging from a more pore‐filling situation toward a more load‐bearing case. While this general trend certainly is also observed in our tomographic experiments, some further details emerge.…”
Section: Microstructure and Physical Propertiesmentioning
confidence: 99%
“…For the first case the obtained P wave velocity is 2368 ms −1 and for the second case it is 2408 ms −1 . Therefore, at the full-transformed state of hydrate formed in a free-gas system (scan 1) the P wave velocity is slightly lower than at the full-transformed state of hydrate formed in a gasrich system (scan 8), which has been discussed earlier in the literature (Priest et al, 2005;Konno et al, 2015;Waite et al, 2009). With the presented results of the modeled P wave velocities the model approach is in a realistic range when compared with field (Carcione and Gei, 2004;Riedel et al, 2002;Yuan et al, 1996) and laboratory data Priest et al, 2005Priest et al, , 2009), but it is noteworthy that the modeled results give only slightly lower values than the experimental ones, even though at significantly lower hydrate saturation (< 20 %) compared to results from laboratory work.…”
Section: Wave Propagation Modeling In Hydrate-bearing Sedimentary Matmentioning
confidence: 62%