3-D internal architecture of methane hydrate-bearing turbidite channels in the eastern Nankai Trough, Japan

Noguchi, Satoshi; Shimoda, Naoyuki; Takano, Osamu; Oikawa, Nobutaka; Inamori, T.; Saeki, Tatsuo; Fujii, Tetsuya

doi:10.1016/j.marpetgeo.2011.02.004

Cited by 60 publications

(37 citation statements)

References 22 publications

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“…Widespread occurrence of bottom simulating reflectors (BSRs) in the deepwater subsurface seismically indicates the distribution of gas hydratehosted sediments (e.g., Ashi et al, 2002;Baba and Yamada, 2004). Recent three-dimensional (3-D) seismic survey and coring/logging operations have revealed a methane hydrate concentration zone (MHCZ) situated immediately above the BSR if the conditions of gas-hydrate petroleum systems are fulfilled (e.g., Fujii et al, 2009;Noguchi et al, 2011;Takano et al, 2009). In the early spring of 2013, the world's first offshore production test of gas hydrates was conducted for the MHCZ at Daini Atsumi Knoll, east of the Kumano forearc basin (Fig.…”

Section: Introductionmentioning

confidence: 99%

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

Egawa

Nishimura

Izumi

et al. 2015

Marine and Petroleum Geology

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Section: Introductionmentioning

confidence: 99%

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

Egawa

Nishimura

Izumi

et al. 2015

Marine and Petroleum Geology

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“…The stratigraphy in the Tokai-Atsumi-Kumano forearc basins was established through sequence stratigraphy and sedimentology using 2D/3D seismic, well log, and core data. It is found that a major depositional system of the sediments is a submarine fan turbidite system (e.g., [10][11][12][13][14]). and (b) the seabed structure map (vertical scale is two-way-time (ms)) and well location map around the first and second offshore gas hydrate production test sites.…”

Section: Geological Setting and Reservoir Architecture In The Second mentioning

confidence: 99%

“…The production test site is located on the northern slope of the Daini-Atsumi Knoll, off Atsumi Peninsula (Figure 1). The active uplift of the knoll occurred after the late Pleistocene (e.g., [10,11]), which led to tilting northwest of about 20 degrees around the test site ( Figure 2). The stratigraphy in the Tokai-Atsumi-Kumano forearc basins was established through sequence stratigraphy and sedimentology using 2D/3D seismic, well log, and core data.…”

Section: Geological Setting and Reservoir Architecture In The Second mentioning

confidence: 99%

“…The stratigraphy in the Tokai-Atsumi-Kumano forearc basins was established through sequence stratigraphy and sedimentology using 2D/3D seismic, well log, and core data. It is found that a major depositional system of the sediments is a submarine fan turbidite system (e.g., [10][11][12][13][14][15]). Our target NGH reservoir is a methane hydrate-concentrated zone (MHCZ, Figure 2), which is characterized by strong amplitude and high velocity anomalies in seismic data, and the high resistivity interval in well log data (e.g., [15,16]).…”

Section: Geological Setting and Reservoir Architecture In The Second mentioning

confidence: 99%

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Characterization and Prediction of the Gas Hydrate Reservoir at the Second Offshore Gas Production Test Site in the Eastern Nankai Trough, Japan

2017

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Abstract:Following the world's first offshore production test that was conducted from a gas hydrate reservoir by a depressurization technique in 2013, the second offshore production test has been planned in the eastern Nankai Trough. In 2016, the drilling survey was performed ahead of the production test, and logging data that covers the reservoir interval were newly obtained from three wells around the test site: one well for geological survey, and two wells for monitoring surveys, during the production test. The formation evaluation using the well log data suggested that our target reservoir has a more significant heterogeneity in the gas hydrate saturation distribution than we expected, although lateral continuity of sand layers is relatively good. To evaluate the spatial distribution of gas hydrate, the integration analysis using well and seismic data was performed. The seismic amplitude analysis supports the lateral reservoir heterogeneity that has a significant positive correlation with the resistivity log data at the well locations. The spatial distribution of the apparent low-resistivity interval within the reservoir observed from log data was investigated by the P-velocity volume derived from seismic inversion. The integrated results were utilized for the pre-drill prediction of the reservoir quality at the producing wells. These approaches will reduce the risk of future commercial production from the gas hydrate reservoir.

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“…The majority of the MHCZ contains turbidite channel-type sediments within a submarine fan system, with thicknesses inside a few tens of meters [19]. The MHCZ at this site dates from the middle-to late-Pleistocene epoch [19,24].…”

Section: Brief Literature Review Of the Nankai Trough Gas Hydrate Fieldmentioning

confidence: 99%

Utilizing Non-Equilibrium Thermodynamics and Reactive Transport to Model CH4 Production from the Nankai Trough Gas Hydrate Reservoir

Qorbani

Kvamme

2017

Energies

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Abstract:The ongoing search for new sources of energy has brought natural gas hydrate (NGH) reservoirs to the forefront of attention in both academia and the industry. The amount of gas reserves trapped within these reservoirs surpasses all of the conventional fossil fuel sources explored so far, which makes it of utmost importance to predict their production potential and safety. One of the challenges facing those attempting to analyse their behaviour is that the large number of involved phases make NGHs unable to ever reach equilibrium in nature. Field-scale experiments are expensive and time consuming. However, computer simulations have now become capable of modelling different gas production scenarios, as well as production optimization analyses. In addition to temperature and pressure, independent thermodynamic parameters for hydrate stabilization include the hydrate composition and concentrations for all co-existing phases. It is therefore necessary to develop and implement realistic kinetic models accounting for all significant routes for dissociation and reformation. The reactive transport simulator makes it easy to deploy nonequilibrium thermodynamics for the study of CH 4 production from hydrate-bearing sediments by considering each hydrate-related transition as a separate pseudo reaction. In this work, we have used the expanded version of the RetrasoCodeBright (RCB) reactive transport simulator to model exploitation of the methane hydrate (MH) reservoir located in the Nankai Trough, Japan. Our results showed that higher permeabilities in the horizontal direction dominated the pressure drop propagation throughout the hydrate layers and affected their hydrate dissociation rates. Additionally, the comparison of the vertical well versus the horizontal well pattern indicated that hydrate dissociation was slightly higher in the vertical well scenario compared to the horizontal.

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3-D internal architecture of methane hydrate-bearing turbidite channels in the eastern Nankai Trough, Japan

Cited by 60 publications

References 22 publications

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

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

Characterization and Prediction of the Gas Hydrate Reservoir at the Second Offshore Gas Production Test Site in the Eastern Nankai Trough, Japan

Utilizing Non-Equilibrium Thermodynamics and Reactive Transport to Model CH4 Production from the Nankai Trough Gas Hydrate Reservoir

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