Bulk sediment mineralogy of gas hydrate reservoir at the East Nankai offshore production test site

Influence of Fines Content on the Mechanical Behavior of Methane Hydrate‐Bearing Sediments

“…8; silica sand silt; and mica and kaolinite in different proportions by weight. It is in accordance with the mineralogy components of core samples retrieved from the Nankai Trough (Egawa et al, ; Ministry of Economy, Trade, and Industry (METI), ). Tests on the core samples retrieved from the reservoir in the Nankai Trough indicated that the porosity n varied between 40% and 50% (Suzuki et al, ; Yoneda et al, ).…”

Mechanical properties of hydrate-bearing turbidite reservoir in the first gas production test site of the Eastern Nankai Trough

“…A thick sandy layer containing fines was observed at depths of more than 300 mbsf . A quantitative analysis of the sediments using X-ray diffraction was conducted by Egawa et al (2015), who quantified the main minerals: smectite, chlorite, mica, hornblende, kaolinite, quartz, orthoclase, plagioclase, calcium carbonate, and pyrite (Fig. 3).…”

Effect of methane hydrate morphology on compressional wave velocity of sandy sediments: Analysis of pressure cores obtained in the Eastern Nankai Trough

“…The value for r S was obtained from the analysis of each core after dissociation; the core sediment was collected to determine fundamental sediment properties, such as the sediment grain density, grain size, and mineral composition. Detailed test methods for the analysis of sediment properties are given by Ito et al (2015) and Egawa et al (2015). By solving equations (1) and (2), f and S H were determined for each sub-sampled core.…”