Characteristics of features formed by gas hydrate and free gas in the continental slope and abyssal plain of the Middle Caspian Sea

Gerivani, Hadi; Putans, V. A.; Merklin, L. R.; Modarres, Mohammad Hadi

doi:10.1080/1064119x.2019.1709585

Cited by 7 publications

(3 citation statements)

References 51 publications

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“…The northern contourite feature is divided by the obvious fault into two segments which together form typical fault-controlled drift (Figure 13). The acoustical transparent anomalies indicative of gas escape are widely distributed in the Caspian Sea [44,61]. Similar weak acoustic anomalies are observed in this area (Figure 13B).…”

Section: Contourite Sedimentary Driftssupporting

confidence: 63%

“…In the bottom relief, the drift is complicated by a channel-looking feature (Figure 11); however, this feature can be interpreted as a crater because canyons are normally V-shaped and have new sedimentation at the bottom, but the materials at the bottom of this structure seem to collapse down. Gerivani et al [44] interpret this structure as a crater formed by a mechanism such as that suggested and described by [45,46] for "hill-hole pairs". In this crater, it seems that the mixture of high-pressure gas, sediments and water were first emitted from probably weak zones in both sides of the crater, and then the upper beds collapsed down.…”

Section: Northern Slope (Mangyshlak Sill)mentioning

confidence: 92%

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Contourite and Turbidite Features in the Middle Caspian Sea and Their Connection to Geohazards Derived from High-Resolution Seismic Data

Yutsis

Левченко

Putans

2022

JMSE

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High fluvial input combined with specific topographic and oceanographic settings in the Caspian Sea create favorable conditions for contourite deposition. For the first time in its middle portion, contourite deposits have been observed in high-resolution seismic profiles. Various types of contourite drifts and mixed depositional systems have been revealed on the lower slope and in the adjacent basin, some of which are accompanied by sediment wave fields. The deposition of contourites or turbidites and their lateral distribution is controlled by sea-floor topography and oceanographic processes, as well as the modern activity of gravity flows downslope on the western Caucasian slope and in the channel system on the Mangyshlak Sill. The contourite drifts and sediment wave fields form several contourite depositional systems, which seem to merge in the Caspian contourite depositional complex. This occurs near the foot of slopes of the Derbent Basin and is related to the counterclockwise circum-Caspian current in the Middle Caspian Sea. The fact that the Caspian Sea is the largest lake in the world makes this region a significant area for research into the “lake contourites” issue. The Caspian Sea is an important oil-producing area, and sedimentary processes related to the contourite and turbidite can be a source of potential geohazards in the construction and exploitation of underwater engineering structures

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Section: Contourite Sedimentary Driftssupporting

confidence: 63%

Section: Northern Slope (Mangyshlak Sill)mentioning

confidence: 92%

Contourite and Turbidite Features in the Middle Caspian Sea and Their Connection to Geohazards Derived from High-Resolution Seismic Data

Yutsis

Левченко

Putans

2022

JMSE

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“…It is estimated that 97-99% of the discovered gas hydrate resources in the world are located in the ocean, and only 1-3% are distributed on land (Merey and Chen, 2022). Gas hydrate also exists in deep-water areas of some inland seas and lakes, such as the Black Sea and Lake Baikal (Gerivani et al, 2020;Yevgeny et al, 2021). Nevertheless, people are more concerned about the gas hydrate stability zone (GHSZ) with considerable thickness in the ocean because the thick layered hydrate-bearing sediments generally do not appear in the inland seas and lakes.…”

Section: Introductionmentioning

confidence: 99%

A state-of-the-art review and prospect of gas hydrate reservoir drilling techniques

et al. 2022

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Securing energy means grasping the key link in the national development and security strategy. Under the goals of carbon peak and carbon neutrality, the overall tendency of energy development is to increase the proportion of natural gas while stabilizing oil consumption, and the global primary energy is entering the era of natural gas. Gas hydrate in deep seabed shallow strata and extremely cold permafrost regions has piqued the interest of researchers due to its abundant resources, widespread distribution, and high energy density. Although the drilling of hydrate wells is still fraught with unknowns and challenges due to the technological barriers between countries, complex on-site working conditions, and unique physical chemical properties, accumulation forms, and occurrence characteristics of gas hydrate, more than ten successful trial productions around the world have opened the door of hope for the development of this potentially new energy. The gas hydrate reservoir drilling technique is the frontier and hotspot of scientific and technological innovation and competitiveness around the globe today, reflecting the level of oil and gas technical advancement. At the national level, it possesses strategic and revolutionary features. Innovative drilling techniques, scientific well location layout, appropriate wellbore structure and well trajectory design, efficient drilling fluid, qualified drilling and completion equipment, and successful pressure-temperature preserved coring may all provide a strong guarantee for the successful completion of gas hydrate wells. This review comprehensively reviews the drilling techniques and engineering measures that can be used to develop gas hydrate. It focuses on the research advancement of important hydrate drilling technologies and the enlightening significance of these developments in the application of hydrate drilling. This work will deliver valuable experience as well as comprehensive scientific information for gas hydrate exploration and drilling.

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Progress on drilling innovations for natural gas hydrate

Chen,

Wu,

Zhang

et al. 2024

Sustainable Natural Gas Drilling

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Characteristics of features formed by gas hydrate and free gas in the continental slope and abyssal plain of the Middle Caspian Sea

Cited by 7 publications

References 51 publications

Contourite and Turbidite Features in the Middle Caspian Sea and Their Connection to Geohazards Derived from High-Resolution Seismic Data

Contourite and Turbidite Features in the Middle Caspian Sea and Their Connection to Geohazards Derived from High-Resolution Seismic Data

A state-of-the-art review and prospect of gas hydrate reservoir drilling techniques

Progress on drilling innovations for natural gas hydrate

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