Yelchenko-Lobovska, A. S. та Pedchenko, S. та Pedchenko, M. M. (2023) METHODOLOGY FOR DETERMINING THE PARAMETERS OF THE START OF GAS HYDRATES MASS CRYSTALLIZATION. UNIVERSITAS Publishing. с. 326-342.

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English abstract

Man-made gas hydrates create serious problems for the oil and gas production industry. Prevention of hydrate formation requires significant costs. In addition, it is important to understand the physics and parameters of hydrate formation processes. Therefore, an urgent task is to establish the peculiarities of the kinetics and parameters of hydrate formation in technological processes. The object of the research was the parameters of the beginning of mass crystallization of gas hydrates in reservoir systems. The process of hydrate formation at the phase boundary is manifested by the formation of a thin layer of hydrate in the form of a film. In the course of experimental studies, it was established that this process is visually fixed by clouding of the pre-specular phase boundary. The effect of distortion of the interphase boundary is explained by the formation, growth, and chaotic accumulation of gas hydrate microcrystals at this boundary. Based on the results of theoretical and experimental studies, the methodology of operative laboratory determination of parameters of mass crystallization of gas hydrate is justified. The essence of the technique is to fix these parameters by the optical effect of distortion of the reflection of the light source on the mirror of the "liquid-gas" interphase surface. The results of empirical studies are based on optical phenomena that were recorded on the interphase surface of the gas hydrate layer and gas. They were studied using microscopy, fixation and image processing methods. The main result of the experiments was the information recorded by the optical system and obtained after fixing the pressure and temperature. The technique can be used to establish and operationally control the moment of mass crystallization of gas hydrates directly at the objects of the oil and gas industry (during the implementation of technological processes). This will make it possible to effectively prevent clogging of technological equipment with the solid phase of gas hydrate, as well as to prevent overuse of hydrate formation inhibitors. At the same time, the only limitation of the application of this technique may be the low light permeability of the aqueous solution as part of the formation system.

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