Thermal properties and thermal structure in the deep-water coalbed basin off the Shimokita Peninsula, Japan

Tanikawa, Wataru; Tadai, Osamu; Morita, Sumito; Lin, Weiren; Yamada, Yasuhiro; Yukitoshi, Sanada; Moe, Kyaw; Kubo, Yusuke; Inagaki, Fumio

doi:10.1016/j.marpetgeo.2016.03.006

Cited by 44 publications

(30 citation statements)

References 46 publications

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“…Water content, color, and vitrinite reflectance measurements suggest the coal has low maturity (Inagaki et al, 2012;Gross et al, 2015;Tanikawa et al, 2016). The sand sample is unconsolidated and extremely soft (i.e., beach sand) (see the "Site C0020" chapter [Expedition 337 Scientists, 2013]).…”

Section: Coal-bearing Formation Samplesmentioning

confidence: 99%

“…The temperature of the confining fluid was fixed at 50°C, which is similar to the ambient temperature at 1900 mbsf (Inagaki et al, 2012;Tanikawa et al, 2016). The temperature of the confining fluid in the pressure vessel was regulated by a constant-temperature fluid circulating in which a silicon oil is circulated through the heater (Julabo, Baden-Württem-berg, Germany, HE) and around the pressure vessel ( Figure F1).…”

Section: Permeability Measurementsmentioning

confidence: 99%

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Data report: permeability of ~1.9 km-deep coal-bearing formation samples off the Shimokita Peninsula, Japan

Ijiri¹,

Ikegawa²,

Inagaki³

2017

Proceedings of the IODP

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We report the permeability of ~1.9 km deep coal-bearing formation samples retrieved at Site C0020 during Integrated Ocean Drilling Program Expedition 337 off the Shimokita Peninsula, Japan. The flow-through permeability test was conducted by a triaxial consolidation permeability test device. The intrinsic permeability of lignite coal samples is 3.80 × 10 -20 m 2 and 3.61 × 10 -20 m 2 at 1919.57 and 1922.95 meters below seafloor (mbsf), respectively. In contrast, a sample from a sand layer interbedded with the coal layer at 1925.38 mbsf is unconsolidated and too soft to conduct permeability tests. The sand size fraction (>75 µm) is 88.5 wt%, and the estimated porosity is 40.5%.

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Section: Coal-bearing Formation Samplesmentioning

confidence: 99%

Section: Permeability Measurementsmentioning

confidence: 99%

Data report: permeability of ~1.9 km-deep coal-bearing formation samples off the Shimokita Peninsula, Japan

Ijiri¹,

Ikegawa²,

Inagaki³

2017

Proceedings of the IODP

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“…Lin et al (2014) determined thermal conductivity, heat capacity, and thermal diffusivity of core samples obtained from the Japan Trench by applying the hot-disk method (Gustafsson 1991). Applying the same method, Tanikawa et al (2016) determined these three properties for core samples taken from the sedimentary basin off Shimokita, Japan. Empirical formulae connecting heat capacity and thermal diffusivity to thermal conductivity for marine sediment were developed to infer heat capacity and thermal diffusivity from existing thermal conductivity data for the sediment (Von Herzen and Maxwell 1959;Hyndman et al 1979;Goto and Matsubayashi 2008).…”

Section: Introductionmentioning

confidence: 99%

Physical and thermal properties of mud-dominant sediment from the Joetsu Basin in the eastern margin of the Japan Sea

et al. 2017

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on the sediment mineral composition. Conversely, the grain heat capacity and grain specific heat showed hardly any dependency on the mineral composition. We propose empirical formulae for the relationships between: thermal diffusivity and thermal conductivity, and heat capacity and thermal conductivity for the sediment in the Joetsu Basin. These relationships are different from those for mud-dominant sediment in the eastern flank of the Juan de Fuca Ridge presented in previous work, suggesting a difference in mineral composition, probably mainly in the amount of quartz, between the sediments in that area and the Joetsu Basin. Similar studies in several areas of sediments with various mineral compositions would enhance knowledge of the influence of mineral composition.

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“…The maximum temperature at the bottom of Hole C0020A was estimated by examining the temperature build-up pattern during the logging operation. The estimated temperature gradient was 24.0 • C km −1 or slightly higher (Tanikawa et al, 2016).…”

Section: Physical Properties and Downhole Loggingmentioning

confidence: 82%

“…Discrete core samples are likely more representative of in situ porosity than cuttings. Due to the very good borehole condition, logging data were excellent quality, resulting in straightforward interpre- agaki et al, 2012;Tanikawa et al, 2016). Note that discrete core samples can be more representative for in situ porosity than porosity of cuttings.…”

Section: Physical Properties and Downhole Loggingmentioning

confidence: 99%

IODP Expedition 337: Deep Coalbed Biosphere off Shimokita – Microbial processes and hydrocarbon system associated with deeply buried coalbed in the ocean

2016

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Abstract. The Integrated Ocean Drilling Program (IODP) Expedition 337 was the first expedition dedicated to subseafloor microbiology that used riser-drilling technology with the drilling vessel Chikyu. The drilling Site C0020 is located in a forearc basin formed by the subduction of the Pacific Plate off the Shimokita Peninsula, Japan, at a water depth of 1180 m. Primary scientific objectives during Expedition 337 were to study the relationship between the deep microbial biosphere and a series of ∼ 2 km deep subseafloor coalbeds and to explore the limits of life in the deepest horizons ever probed by scientific ocean drilling. To address these scientific objectives, we penetrated a 2.466 km deep sedimentary sequence with a series of lignite layers buried around 2 km below the seafloor. The cored sediments, as well as cuttings and logging data, showed a record of dynamically changing depositional environments in the former forearc basin off the Shimokita Peninsula during the late Oligocene and Miocene, ranging from warm-temperate coastal backswamps to a cool water continental shelf. The occurrence of small microbial populations and their methanogenic activity were confirmed down to the bottom of the hole by microbiological and biogeochemical analyses. The factors controlling the size and viability of ultra-deep microbial communities in those warm sedimentary habitats could be the increase in demand of energy and water expended on the enzymatic repair of biomolecules as a function of the burial depth. Expedition 337 provided a test ground for the use of riser-drilling technology to address geobiological and biogeochemical objectives and was therefore a crucial step toward the next phase of deep scientific ocean drilling.

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Thermal properties and thermal structure in the deep-water coalbed basin off the Shimokita Peninsula, Japan

Cited by 44 publications

References 46 publications

Data report: permeability of ~1.9 km-deep coal-bearing formation samples off the Shimokita Peninsula, Japan

Data report: permeability of ~1.9 km-deep coal-bearing formation samples off the Shimokita Peninsula, Japan

Physical and thermal properties of mud-dominant sediment from the Joetsu Basin in the eastern margin of the Japan Sea

IODP Expedition 337: Deep Coalbed Biosphere off Shimokita – Microbial processes and hydrocarbon system associated with deeply buried coalbed in the ocean

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