The results of testing the technology of hydraulic fracturing of the coal seam through wells from the surface at the Kirov mine

The article presents the results of a preliminary analysis of the application of complex degassing technology of the Boldyrevsky coal seam under development at the Kirov mine. Degassing was carried out at the currently used excavation site 24-63 and included hydraulic fracturing of the formation through wells drilled from the surface (FRAC); hydraulic fracturing it through wells drilled from preparatory workings (PodzGRP), as well as standard reservoir degassing (PPD) by rising and descending wells drilled from preparatory workings into partially disintegrated hydraulic separation is the area of the degassed reservoir. The main attention is paid to the hydraulic fracturing technology, first applied at the Kuzbass mines for the purposes of degassing preparation of the coal seam under development for intensive and safe mining. It is confirmed that the process of hydraulic fracturing of the coal seam with cyclic hydraulic fracturing was implemented at the wells of the excavation site 24-63 under hydrodynamic influence. An initial assessment of the effectiveness of the tested technology was obtained. In the course of the conducted studies, the zones of the excavation site 24-63, where the influence of hydraulic fracturing wells was presumably taking place, and the zones of the same site, where it was practically absent, were compared. At the time of writing, the average load in lava 24-63 for all hydraulic fracturing zones was 16% higher than in the comparison zones. Stops for airing in one production cycle for all zones of hydraulic fracturing are 15% less, the relative gas content for all zones of hydraulic fracturing is 12% lower, which also preliminarily confirms the technical effectiveness of the use of coal seam hydraulic fracturing technology for degassing purposes. The directions of technology improvement are shown.

Keywords: advance degassing, complex degassing preparation of the coal seam, wells from the surface, hydraulic fracturing, efficiency assessment methodology, regime of hydrodynamic impact, hydraulic fracturing with cyclic fracturing, efficiency of complex reservoir degassing, increased loads on the treatment face, reduction of lava gas content and downtime, implementation of the effect of coal swelling, the main technological conclusions and recommendations, directions for improving the technology.

For citation:

Slastunov S. V., Sadov A. P., Khautiev A. M.-B., Komissarov I. A. The results of testing the technology of hydraulic fracturing of the coal seam through wells from the surface at the Kirov mine. MIAB. Mining Inf. Anal. Bull. 2022;(11):121-132. [In Russ]. DOI: 10.25018/0236_1493_2022_11_0_121.

Acknowledgements:

About authors:

S.V. Slastunov, Dr. Sci. (Eng.), Professor, Mining Institute, National University of Science and Technology «MISiS», 119049, Moscow, Russia, e-mail: slastunovsv@mail.ru, URSID ID: 0000-0003-0744-6892,
A.P. Sadov¹, Cand. Sci. (Eng.), Director, e-mail: sadovap@suek.ru,
A.M.-B. Khautiev¹, Cand. Sci. (Eng.), Engineer-Technologist, e-mail: khautievam@suek.ru,
I.A. Komissarov¹, Deputy Chief Engineer, e-mail: komissarovia@suek.ru,
¹ Methane Degassing and Utilization Department, SUEK-Kuzbass JSC, Leninsk-Kuznetsky, Russia.

 

For contacts:

S.V. Slastunov, e-mail: slastunovsv@mail.ru.

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