Methane hydrate detection with marine electromagnetic surveys: Case studies off Japan coast

Goto, Tada-nori; Kasaya, Takafumi; Takagi, Ryo; Sakurai, Noriaki; Harada, Makoto; Sayanagi, K.; Kinoshita, Masataka

doi:10.1109/oceanse.2009.5278243

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…CSEM has been a useful geophysical method to discriminate between high and low hydrocarbon saturation in a potential reservoir [31,50,[63][64][65][66]. Many applications in natural gas hydrate detection have been published from, e.g., the North Sea [67,68], Taiwan [69], the Gulf of Mexico and Canada [70], the Danube Paleo-Delta [20], Norway [44], the South China Sea [71], and the Western Black Sea [54].…”

Section: Applications Of Measurement Configurationsmentioning

confidence: 99%

An Introduction to the Application of Marine Controlled-Source Electromagnetic Methods for Natural Gas Hydrate Exploration

Slob

Werthmüller

et al. 2022

JMSE

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Natural gas hydrates have been an unconventional source of energy since the beginning of this century. Gas-hydrate-filled reservoirs show higher resistivity values compared with water-filled sediments. Their presence can be detected using marine controlled-source electromagnetic methods. We classify acquisition configurations into stationary and moving receiver configurations, which are described in terms of the design group, the operational details, and where they have been used successfully in the field for natural gas hydrate exploration. All configurations showed good numerical results for the detection of a 700 m long gas hydrate reservoir buried 200 m below the seafloor, but only the stationary configurations provided data that can be used to estimate the horizontal boundaries of the resistive part of the reservoir when the burial depth is known from seismic data. We discuss the operational steps of the configurations and provide the steps on how to choose a suitable configuration. Different CSEM configurations were used together with seismic data to estimate the edge of the gas hydrate reservoir and the total volume of the gas hydrates, to optimize the drilling location, to increase production safety, and to improve geological interpretations. It seems that CSEM has become a reliable method to aid in the decision-making process for gas hydrate reservoir appraisal and development.

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Section: Applications Of Measurement Configurationsmentioning

confidence: 99%

An Introduction to the Application of Marine Controlled-Source Electromagnetic Methods for Natural Gas Hydrate Exploration

Slob

Werthmüller

et al. 2022

JMSE

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“…It is proposed that the combination of depressurization and wellbore heating will greatly increase the production capacity, single thermal excitation is less efficient, the replacement method under high pressure can cause the formation of carbon dioxide hydrate in the wellbore and lead to blockage, and the replacement method under low pressure injection is feasible instead. In 2013, Japan carried out the hydrate exploitation test by depressurization in the condition of 1006 m seawater depth in the sea area of Aichi prefecture, which is the first successful exploration of underwater natural gas hydrate in the world . And in 2017, the exploitation test was taken again in the same sea area through the method of depressurization .…”

Section: Introductionmentioning

confidence: 99%

“…In 2013, Japan carried out the hydrate exploitation test by depressurization in the condition of 1006 m seawater depth in the sea area of Aichi prefecture, which is the first successful exploration of underwater natural gas hydrate in the world. 13,14 And in 2017, the exploitation test was taken again in the same sea area through the method of depressurization. 15 In 2017, China has carried out a hydrate exploitation test by depressurization in the condition of 1226 m seawater depth in the South China Sea.…”

Section: Introductionmentioning

confidence: 99%

Multiphase non equilibrium pipe flow behaviors in the solid fluidization exploitation of marine natural gas hydrate reservoir

Wei

Sun

Meng

et al. 2018

Energy Science & Engineering

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In recent years, marine hydrate has attracted more and more attentions. As a creative way to efficiently exploit marine hydrate, the method of solid fluidization exploitation is to excavate and crush hydrate, transport hydrate particles to sea surface platform through airtight pipeline, and obtain methane gas finally. When hydrate particles are transported up, as temperature rises and pressure drops, hydrate will decompose at a certain critical position and produce a large amount of gas, bringing complicated gas‐liquid‐solid multiphase non equilibrium pipe flow, and seriously threating well control securities. Thus, we establish mathematical models of wellbore temperature and pressure, hydrate phase equilibrium, hydrate dynamic decomposition in riser pipe flow and wellbore multiphase flow coupling hydrate dynamic decomposition, and propose and verify numerical calculation method. Then numerical model application analysis under different construction parameters is carried out, influence behaviors of multiphase non equilibrium pipe flow are obtained, and field construction measures are put forward. Properly increasing solid throughput can increase production of natural gas. However, problems such as well control risks will intensify. Therefore, delivery capacity, liquid density, and wellhead back pressure should be increased appropriately at the same time. This study provides important technical support for solid fluidization exploitation of marine hydrate.

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Imitating possible consequences of drilling through marine hydrate reservoir

Sun

Zhao

Kvamme

et al. 2022

Energy

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Methane hydrate detection with marine electromagnetic surveys: Case studies off Japan coast

Cited by 4 publications

References 5 publications

An Introduction to the Application of Marine Controlled-Source Electromagnetic Methods for Natural Gas Hydrate Exploration

An Introduction to the Application of Marine Controlled-Source Electromagnetic Methods for Natural Gas Hydrate Exploration

Multiphase non equilibrium pipe flow behaviors in the solid fluidization exploitation of marine natural gas hydrate reservoir

Imitating possible consequences of drilling through marine hydrate reservoir

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