Method for calculating the parameters of formation of hydrates from multicomponent gases

Zaporozhets, E. P.; Шостак, Н. А.

doi:10.1134/s0036024416090338

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…Если в газе, диффундирующем сквозь лед, имеются компоненты, из которых могут образовываться новые гидраты, стабильные при давлении окружающей среды P2 и условиях (1) и (8), то поверхностный слой будет состоять из смеси льда и нового гидратаэффект консервации (рисунок 3, а4). Расчет образования новых гидратов выполняется по методике [10].…”

Section: диссоциация механически целого гидратаunclassified

Mathematical modeling of some features of gas hydrates dissociation

Zaporozhets

Шостак

2018

Vestn. Voronež. gos. univ. inž. tehnol.

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In the modern oil and gas industry, specialists often have to solve multifaceted problems associated with processes of dissociation of technogenic and natural gas hydrates. Known methods of calculation and dissociation studies mainly describe this process with the supply to heat hydrate. However, when using the method of pressure reduction for dissociation, hydrate metastability states are manifested - self-preservation and conservation effects, discovered by Russian and foreign researchers. Available in the literature descriptions of the effects of metastability were obtained as a result of experiments with hydrates from one-component gases and for specific thermobaric conditions. The existing dependencies for some hydrate systems do not apply to others, so that their direct application in solving practical problems, for example, with the extraction of natural gas or the elimination of man-made hydrates in a wide range of thermobaric conditions, is difficult. Therefore, the creation of a method for calculating the main parameters of the dissociation of hydrates from multicomponent gases is relevant. The article presents the developed physico-mathematical model of the features of hydrate dissociation process under isothermal pressure decrease of its environment. With the help of these models, the parameters of the hydrate dissociation process, including manifestations of their metastability states, are calculated. The mathematical dependencies connecting the parameters of the hydration dissociation process with the current parameters of the medium, as well as with the thermobaric conditions of the process of their formation (i.e. with their "history") can be used to solve practical problems of ensuring reliability and continuity of functioning systems of oil and gas industry. In addition, the obtained dependences can be used to develop promising reserves of hydrocarbons that are in the hydrate state in the depths and bottom sediments of the continental shelves, as well as to intensify oil and gas production using hydrate technologies.

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Section: диссоциация механически целого гидратаunclassified

Mathematical modeling of some features of gas hydrates dissociation

Zaporozhets

Шостак

2018

Vestn. Voronež. gos. univ. inž. tehnol.

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“…The research was performed using the physical and mathematical models published in several works [1,2], from which it is possible to calculate the main parameters of hydrate formation and dissociation in a wide range of thermobaric conditions. The most widespread conditions of formation and dissociation of hydrates in the development and exploitation of gas and condensate fields were analyzed.…”

Section: Introductionmentioning

confidence: 99%

“…It made the authors suggest that the process of cavity formation in respect of energy is similar to the adsorption process, and it is possible to use Langmuir constants for defining the levels of filling the hydrate cavities [2].…”

Section: Introductionmentioning

confidence: 99%

Research of Processes of Formation and Dissociation of Natural Gas Hydrates

Zaporozhets¹,

Шостак²

2017

Proceedings of the International Conference "Actual Issues of Mechanical Engineering" 2017 (AIME 2017)

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Abstract-Technogenic hydrates are mostly a negative factor in the oil and gas industry. Their formation in the bottomhole well zone and in wellbores complicates the extraction, reducing their production rate. In the hydrocarbons collection systems, the hydrates in certain thermobaric conditions deposit on the gas pipeline walls and raise their hydraulic resistance, thus increasing energy costs. The presence of hydrates in the streams of the fluid, extracted from subsoil, increases the wear of production headers, reducing their resource. In the systems of field treatment of hydrocarbons, hydratation negatively affects the technological processes. Hydrate formation in machinery and aggregates of gathering facilities and processing systems leads to accidents. Hydrate deposition in gas pipelines decreases work efficiency. For solving the problems related to prevention and elimination of technogenic hydrates, it is necessary to be able to define the basic parameters of hydrate formation and dissociation. This article is devoted to the research of the processes of formation and dissociation of hydrates. The research was performed using the physical and mathematical models, published in several works, from which it is possible to calculate the main parameters of hydrate formation and dissociation in a wide range of thermobaric conditions. The most widespread conditions of formation and dissociation of hydrates in the development and exploitation of gas and condensate fields were analyzed in this article.

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Efficiency of Chemicals to Prevent the Formation and Elimination of Gas Hydrates

Шостак

Zaporozhets

2020

Russ. J. Inorg. Chem.

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Method for calculating the parameters of formation of hydrates from multicomponent gases

Cited by 3 publications

References 7 publications

Mathematical modeling of some features of gas hydrates dissociation

Mathematical modeling of some features of gas hydrates dissociation

Research of Processes of Formation and Dissociation of Natural Gas Hydrates

Efficiency of Chemicals to Prevent the Formation and Elimination of Gas Hydrates

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