Key Areas of Gas Hydrates Study: Review

Gaidukova, Olga; Misyura, S.Y.; Стрижак, П. А.

doi:10.3390/en15051799

Cited by 17 publications

(12 citation statements)

References 141 publications

(215 reference statements)

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“…The main hydrocarbon reserves in the world's oceans are concentrated in the form of methane gas hydrates [35,[78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97]. Many siboglinid records in the Barents Sea and the adjoining Arctic Basin are confined to the areas of such gas hydrates (Figure 6A).…”

Section: Discussionmentioning

confidence: 99%

Distribution of Gutless Siboglinid Worms (Annelida, Siboglinidae) in Russian Arctic Seas in Relation to Gas Potential

et al. 2022

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In the Russian Arctic seas and adjacent areas of the Arctic basin, 120 sites of siboglinid records are currently known. Individuals belonging to 15 species have been collected. The largest number (49.2%) of records were made in the Barents Sea, followed by the Laptev Sea (37.5%) and the Arctic basin (10 records; 8.3%). No siboglinids have been reported from the Chukchi Sea. The largest number of species has been identified in both the Laptev Sea and Arctic basin (seven species each). Seventy-eight percent of the records were discovered at water depths down to 400 m. Many of the siboglinid records in the Arctic seas of Russia are associated with areas of high hydrocarbon concentrations. In the Barents Sea, Nereilinum murmanicum has been collected near the largest gas fields. The records of Oligobrachia haakonmosbiensis, N. murmanicum, Siboglinum ekmani, Siboglinum hyperboreum, Siboglinum norvegicum, as well as two undetermined species of siboglinids are associated with the marginal areas of bottom gas hydrates where methane emissions can occur. The Arctic seas of Russia feature vast areas of permafrost rocks containing gas hydrates flooded by the sea. Under the influence of river runoff, gas hydrates dissociate, and methane emissions occur. Crispabrachia yenisey and Galathealinum karaense were found in the Yenisei estuary, and O. haakonmosbiensis was found in the Lena estuary.

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Section: Discussionmentioning

confidence: 99%

Distribution of Gutless Siboglinid Worms (Annelida, Siboglinidae) in Russian Arctic Seas in Relation to Gas Potential

et al. 2022

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“…где c есть масштабированный фактор Зельдовича [18,19], маркеры обозначают результаты моделирования молекулярной динамики; сплошные линии -результаты подгонки уравнения (6). Из рисунка видно, что с увеличением скорости охлаждения системы наблюдает-…”

Section: результаты и обсуждениеunclassified

“…Они образованы из молекул газа (молекулы-гости), которые заключены в полости трехмерных решеток из молекул водыводные клатратные каркасы (каркасы хозяина) [5]. Природные гидраты являются одной из форм существования газа в недрах Земли и считаются перспективными источниками углеводородного газа [6]. Газовые гидраты образуются при низких температурах и высоких давлениях, в природе обнаруживаются в зонах вечной мерзлоты и на дне континентальных шельфов.…”

Section: Introductionunclassified

“…Газовые гидраты образуются при низких температурах и высоких давлениях, в природе обнаруживаются в зонах вечной мерзлоты и на дне континентальных шельфов. Интерес к изучению данных соединений вызван перспективой их широкого практического применения в промышленности и энергетике [6,7]. Поскольку плотность газовых гидратов близка к плотности газов в сжиженном состоянии, предполагается их активное использование для транспортировки и хранения газов.…”

Section: Introductionunclassified

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Молекулярно-Динамические Исследования Процесса Кристаллизации И Роста Газовых Гидратов В Сильно Переохлажденной Двухфазной Системе "Метан-Вода"

Хуснутдинов¹,

Хайруллина²,

Юнусов³

2023

Физика Твердого Тела

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The processes of nucleation and growth of methane hydrate in a highly supercooled two-phase methane–water system obtained using various cooling protocols are considered. It has been shown that, at sufficiently high cooling rates, crystalline forms of methane hydrate can still form in the system. It was found that, at a cooling rate of γ = 1.0 K/ps, the process of nucleation and growth of gas hydrate was observed in all independent molecular dynamics iterations, while at a cooling rate of γ = 10.0 K/ps, no nucleation event was observed in ~26.7% of numerical experiments. It was found that with an increase in the cooling rate of the system, an increase in the average time scale of nucleation τc and a decrease in the critical size of the nucleus nc are observed. It is shown that at a sufficiently deep level of supercooling of the system, the scenario of homogeneous crystalline nucleation is realized at the initial stage of the phase transition.

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“…Natural gas hydrates, as a promising strategic resource, need further exploitation and development [127]. To bridge the gap between hypothesis and reality and make the theoretical model closer to the actual situation, future research should start from the following aspects: anisotropy and heterogeneity of HBSs, hydrate pore habits and morphology, pore characteristics of sediments, fine-grained HBSs, embedded parameter in the model and multi-field coupling seepage characteristics.…”

Section: Challenges and Suggestions Of Future Research Directionsmentioning

confidence: 99%

Permeability Models of Hydrate-Bearing Sediments: A Comprehensive Review with Focus on Normalized Permeability

et al. 2022

Energies

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Natural gas hydrates (NGHs) are regarded as a new energy resource with great potential and wide application prospects due to their tremendous reserves and low CO2 emission. Permeability, which governs the fluid flow and transport through hydrate-bearing sediments (HBSs), directly affects the fluid production from hydrate deposits. Therefore, permeability models play a significant role in the prediction and optimization of gas production from NGH reservoirs via numerical simulators. To quantitatively analyze and predict the long-term gas production performance of hydrate deposits under distinct hydrate phase behavior and saturation, it is essential to well-establish the permeability model, which can accurately capture the characteristics of permeability change during production. Recently, a wide variety of permeability models for single-phase fluid flowing sediment have been established. They typically consider the influences of hydrate saturation, hydrate pore habits, sediment pore structure, and other related factors on the hydraulic properties of hydrate sediments. However, the choice of permeability prediction models leads to substantially different predictions of gas production in numerical modeling. In this work, the most available and widely used permeability models proposed by researchers worldwide were firstly reviewed in detail. We divide them into four categories, namely the classical permeability models, reservoir simulator used models, modified permeability models, and novel permeability models, based on their theoretical basis and derivation method. In addition, the advantages and limitations of each model were discussed with suggestions provided. Finally, the challenges existing in the current research were discussed and the potential future investigation directions were proposed. This review can provide insightful guidance for understanding the modeling of fluid flow in HBSs and can be useful for developing more advanced models for accurately predicting the permeability change during hydrate resources exploitation.

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Key Areas of Gas Hydrates Study: Review

Cited by 17 publications

References 141 publications

Distribution of Gutless Siboglinid Worms (Annelida, Siboglinidae) in Russian Arctic Seas in Relation to Gas Potential

Distribution of Gutless Siboglinid Worms (Annelida, Siboglinidae) in Russian Arctic Seas in Relation to Gas Potential

Молекулярно-Динамические Исследования Процесса Кристаллизации И Роста Газовых Гидратов В Сильно Переохлажденной Двухфазной Системе "Метан-Вода"

Permeability Models of Hydrate-Bearing Sediments: A Comprehensive Review with Focus on Normalized Permeability

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