STUDY OF CONDITIONS FOR GAS HYDRATE AND ASPHALTENE-RESIN-PARAFFIN DEPOSITS FORMATION IN MECHANIZED OIL PRODUCTION

Abstract

Link for citation: Korobov G.Y., Vorontsov A.A. Study of conditions for gas hydrate and asphaltene-resin-paraffin deposits formation in mechanized oil production. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 10, рр. 61-75. In Rus. The relevance of the research is caused by the lack of study of gas hydrates and asphaltene-resin-paraffin deposits formation in the borehole space. The properties of the organic deposits formed significantly depend on conditions of their formation. Accordingly, more accurate understanding of principle of deposits formation allows predicting their agglomeration and selecting effective ways to combat the deposition of gas hydrates and asphaltene-resin-paraffin deposits. In addition, information presented in the article makes it possible to evaluate the effect of the main factors affecting the conditions of gas hydrates and asphaltene-resin-paraffin deposits formation. There is an opportunity to point out the most important factors, which can be controlled by changing the parameters of the downhole equipment. These studies can help to optimize selection of downhole equipment parameters in the conditions of organic deposits formation.  The main aim of the research is to analyze the conditions of gas hydrate and asphaltene-resin-paraffin deposits formation in production well; to analyze the results of previous studies on the factors affecting the formation of gas hydrates and asphaltene-resin-paraffin deposits in the borehole space. Objects: factors affecting formation of gas hydrates and asphaltene-resin-paraffin deposits on inner surface of the oilfield equipment. Methods: literature review of publications in peer-reviewed journals; analysis of the results of previous studies, formulation of main ideas and trends, identifying gaps and shortcomings of existing researches. Results. The main mechanisms of gas hydrates and asphaltene-resin-paraffin deposits formation on inner surface of the oilfield equipment are described. A review of previous studies devoted to the analysis of formation mechanisms of asphaltene-resin-paraffin deposits and gas hydrates is presented. The analysis revealed gaps and assumptions in the theory of formation of gas hydrates and asphaltene-resin-paraffin deposits, which require further study of their formation principles. The main factors that depend on the operation of downhole equipment, as well as affecting the formation of organic deposition are analyzed: thermal baric conditions, gas content, throttling, watering, molecular phenomena. These factors are summarized in separate tables.