ASSESSMENT OF THE EFFICIENCY OF STEAM-LITE FLUID PRODUCTION AT THE MUTNOVSKOE GEOTHERMAL FIELD (KAMCHATKA) IN THE DEVELOPMENT OF DEEP HORIZONS

• Published in: Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov
• Main Authors: Aleksandr N. Shulyupin, Aleksey A. Lyubin, Ivan I. Chernev
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Tomsk Polytechnic University 2021
• Subjects: geothermal resources; field; well; steam-lift; reservoir; maximum depression; Engineering geology. Rock mechanics. Soil mechanics. Underground construction; TA703-712; Kamchatka
• Online Access: https://doi.org/10.18799/24131830/2021/9/3354; https://doaj.org/article/f0da686b7b7f41a99272bf3fd9de2465

The relevance of the research is caused by the need to expand the resource base of the Mutnovskoe geothermal field (Kamchatka) in order to fill the heat carrier deficit at existing geothermal power plants and increase the capacity of the plants. The main aim of the research is to assess the efficiency of steam-lite fluid production at the Mutnovskoe geothermal field (Kamchatka) in the development of deep horizons (by wells having deep of 3 and 4 km at existing developing deep of 2 km). Methods: theoretical substantiation of the efficiency indicator for steam-lift production of geothermal fluid; mathematical modeling of the flow in a production steam-lift well with the existing typical design (2 km deep), as well as in wells planned for drilling with depth of 3 and 4 km; analysis of simulation results. Results. The use of the maximum depression in the reservoir, which can be provided by the steam-lift technology of production, was substantiated as an indicator of the steam lift efficiency; it was found that the development of deeper horizons of the Mutnovskoe field with wells up to 3 km, with the existing development depth of up to 2 km, will significantly increase the efficiency of steam-lift production, increasing the maximum drawdown in the reservoir created by production wells by about two times; it was found that the increase in the development depth of the Mutnovskoe field to 4 km is advisable if there is an increase in the temperature of the reservoir at the depth planned for development, so, in the case of temperature growth according to the most probable option (with a geothermal gradient of 1,6 degrees per 100 m), the maximum depression will increase, in cimparison with the existing state, by 3,3 times. Conclusion. The results obtained indicate the technological feasibility of raising the question of the transition at the Mutnovskoe geothermal field to the development of deeper horizons.