STRESS DISTRIBUTION DURING HYDROFRAC INTERVAL SEALING WITH POLYMERIC BRIDGES CONSIDERING THEIR INTERACTION WITH BOREHOLE WALLS
A. V. Azarov, A. V. Patutin
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Угольный пласт, необсаженная скважина, гидравлический разрыв, напряженное состояние, интервал гидроразрыва, несъемный мост, Coal seam, uncased borehole, hydraulic fracturing, stress state, hydrofrac interval, fixed bridge
Abstract
The paper discusses the stress distribution in the vicinity of an uncased borehole during hydraulic fracturing. Fixed bridges made of polymeric material are used as sealing elements. The applied mathematical model takes into account piston displacement of bridges when pressure is applied to an isolated interval. The results obtained allow optimization of engineering solutions of in-mine hydraulic fracturing to intensify the degassing of coal seams.
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