EXPERIMENTAL RESEARCHES OF COAL SEAM FAILURE IN INTERVAL HYDRAULIC FRACTURING
V. I. Klishin, O. V. Tailakov, G. Yu. Opruk, M. P. Makeev, S. V. Sokolov, E. A. Utkaev, A. S. Teleguz
Institute of Coal, Federal Research Center for Coal and Coal Chemistry, Siberian Branch Russian Academy of Sciences, Kemerovo, Russia
Keywords: Поинтервальный гидроразрыв, сейсмологический мониторинг, интенсификация дегазации, устройство гидроразрыва пласта, Interval hydraulic fracturing, seismological monitoring, degassing stimulation, hydraulic fracturing device
Abstract
The flow chart of the hydrodynamic effect on coal rock mass is developed and presented, including the packer introduction into the well, well sealing, hydraulic fracturing, unsealing and displacement of the packer. The process of fracture formation and development during injection of fluids into rocks is investigated. It is shown that a coal seam loosens under the influence of a series of repetitive pulses of change in the pressure of fluid in the borehole space. The estimation results of the coal seam state before and after stimulating its gas recovery by the seismological method are discussed.
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