Modeling of the Kinetics of the Gas Hydrates Formation on the Basis of a Stochastic Approach

Klymenko, Vasyl; Gutsul, Vasyl; Bondarenko, Volodymyr; Martynenko, V. G.; Stets, Peter

doi:10.4028/www.scientific.net/ssp.291.98

Cited by 4 publications

(3 citation statements)

References 38 publications

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“…The reason for this will be mix of this water with fresh water released during melting of gas hydrates at places near mud volcanoes. To calculate the amount of new formed hydrates can be used a stochastic model of the kinetic processes of formation gas hydrates [33]. Also, flow rate of methane from gas hydrates will be reduced by about 10% if pipeline will be lay on the sea bed in comparison with pipeline laying in water (Table 3).…”

Section: Figure 3 a Screenshot Made From Calculations By The Aspen Hy...mentioning

confidence: 99%

An alternative method of methane production from deposits of subaquatic gas hydrates

Klymenko¹,

Oveckiy²,

Martynenko³

et al. 2022

Min. miner. depos.

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Purpose. Determination of the potential efficiency of the alternative method of methane production from subaquatic gas hydrate deposits using the emissions of underwater mud volcanoes considering geological and thermodynamic conditions typical for the Black Sea. Methods. Computer modeling of the processes considering changing of the thermodynamic parameters of the supplying fluid within the pipeline and hydrate deposits was carried out on the basis of the Aspen Hysys program, using the Ng and Robinson model to calculate the energy potential of the fluid. Findings. An algorithm for calculating the distance to which a flow of the emissions mud volcano can be delivered with a temperature sufficient to remove sea bed hydrates from thermodynamic equilibrium and release methane has been developed. The schematic technological solution of an alternative method of methane production from gas hydrate deposits were presented by using the energy of emissions of mud volcano (fluid). The collection device for emissions of mud volcano and gas hydrate sea bed deposits were also been used within the model. The calculations have been done using Aspen Hysys computer program. Originality. The potential efficiency of the alternative method of methane production from gas hydrated sea bed deposits using thermal energy from emissions of underwater volcanoes is substantiated. It is also shown that in the case when the hydrate deposits cover the sea bed natural gas deposits as an impermeable layer, the thermal energy of the gas flow extracted from the sea bed natural gas deposits can be used for the decomposition of the hydrates This case is similar to the considered alternative method of using thermal energy of the emissions of mud volcanoes. Practical implications. The use of an alternative method of methane production from gas hydrate sea bed deposits by using emissions of mud volcano make it possible to increase the amount of gas obtained from subaquatic sources ~ by 7-10% without using additional sources of thermal energy. The practical application of this method will also prevent methane emissions from mud volcanoes into the atmosphere, which reduces pollution of seas and oceans with dissolved gases.

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Section: Figure 3 a Screenshot Made From Calculations By The Aspen Hy...mentioning

confidence: 99%

An alternative method of methane production from deposits of subaquatic gas hydrates

Klymenko¹,

Oveckiy²,

Martynenko³

et al. 2022

Min. miner. depos.

Self Cite

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“…According to these results, the degree of substitution for these thermobaric conditions depends mainly on the concentration of CO 2 in the gas mixture, which is in equilibrium with the hydrate and, thus, has no restrictions on its continuous pumping through the methane hydrate deposit. To calculate the kinetics of the substitution process, you can use a calculation method based on the stochastic model of the hydrate formation process [24] and the macrophysical model of the process [25].…”

Section: Scheme and Technological Solution Of Installation For Methane Extraction From Underwater Deposits Of Gas Hydrates By Injection Omentioning

confidence: 99%

Mining of methane from deposits subaquatic gas hydrates using OTEС

et al. 2021

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The article proposes to using Ocean Thermal Energy Conversion (OTEC) to increase the energy efficiency mining of methane from deposits subaquatic gas hydrates on the gas hydrate cycle (GHET), that will allow not to spend 10-15% of the extracted methane for power supply of a gas-producing complex (GPC). The circuit-technological solution GPC is described, according to which carbon dioxide is introduced into the gas hydrate layer to extract methane from gas hydrates. To improve the kinetics of the process of replacement of methane with carbon dioxide in gas hydrates, it is proposed do recirculation part of CO2. The scheme and cycle of gas-hydrate energy-technological installation GHET are given, which operates using OTEC and generates together with electricity for GPC, fresh water and cold. Based on the method proposed in this paper, a comparative thermodynamic analysis of installations using OTEC for Black Sea conditions was performed. by GHET and Anderson cycles and it is shown that the specific useful work obtained in the GHET cycle, approximately 3 times more, and energetic efficiency 1.5 times more.

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“…However, in most cases, such problems are solved within the framework of the Stefan model using the appropriate numerical methods [17]. The statistical processing of experiments and stochastic approaches are also used [18]. Such solutions are less versatile and are not always convenient for practical use in express assessments and research into the influence of various factors on the dissociation process.…”

Section: Introductionmentioning

confidence: 99%

An approximate approach to estimation of dissociation rate of gas hydrate in porous rock bed

et al. 2021

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Development of deep shelf or onshore gas hydrate fields involves drilling wells with subsequent thermal, decompression or chemical action on the bed. In this case, the radius of thermal or decompression action is limited. As the field develops, recovery efficiency decreases, and necessity arises for drilling a new well that influences the cost of the technology. To determine the rational wells location, it is necessary to predict the advance of the phase transformation rate front into the depth of the bed. In this work, to study the movement dynamics of the gas hydrates dissociation front in a porous layer of rock, the Stefan problem solution is used. The method adequacy is substantiated by comparing the calculated results with known experimental data. The temperature fields are modelled in a porous bed during the methane hydrate dissociation. The temperature field dynamics for 200 days in a porous bed during the methane hydrate dissociation caused by thermal action is shown. The influence of porosity and excess temperature on the dissociation front movement rate is revealed.

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Modeling of the Kinetics of the Gas Hydrates Formation on the Basis of a Stochastic Approach

Cited by 4 publications

References 38 publications

An alternative method of methane production from deposits of subaquatic gas hydrates

An alternative method of methane production from deposits of subaquatic gas hydrates

Mining of methane from deposits subaquatic gas hydrates using OTEС

An approximate approach to estimation of dissociation rate of gas hydrate in porous rock bed

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