Authors: V.I. Klishin, O.V. Tailakov, E.A. Utkaev, S.V. Sokolov

Title of the article: Features of control of hydrodynamic impact on coal bed during interval fracturing

Year: 2023, Issue: 6, Pages: 77-83

Branch of knowledge: 2.8.6. Geomechanics, destruction of rocks by explosion, mine aerogasdynamics and mining thermophysics

Index UDK: 622.245; 539.3

DOI: 10.26730/1999-4125-2023-6-77-83

Abstract: The article provides a brief overview of the application of hydroelectric action on carbonaceous oil to reduce the natural gas content of the formations being developed. An increase in the efficiency of degassing coal seams that are not loaded from rock pressure is discussed by stimulating their gas recovery using hydraulic fracturing of the coal seam, which leads to the development of cracks. A new method of inter-interval hydraulic fracturing of a coal seam through degassing wells drilled from a mine is proposed. The method is based on the use of an original bursting device - a double–sided packer, which includes two elastically expanding sleeves (packers), between which an inter-packer valve is installed, designed to regulate the pressure of the working fluid in the hydraulic system. To assess the effectiveness of the intervertebral hydrodynamic impact on the coal seam, a set of methods and means of monitoring it is provided, including seismic transmission of the carboniferous massif before and after hydraulic fracturing; radio-location survey; determination of natural gas content and reservoir permeability coefficient; assessment of the length of the well, as well as monitoring the process of fluid injection into the well by measuring changes in the pressure of the working fluid. As a confirmation of the rationality of the proposed method, the actual pressure curve is presented with the allocation of intervals corresponding to the opening of natural cracks, hydraulic fractures and the formation of new cracks, obtained as part of monitoring the hydrodynamic effects on the mined coal seam of an operating mine.

Key words: degassing degassing boreholes gas recovery coal seam interval hydraulic fracturing double packer hydraulic impact monitoring seismic scanning

Receiving date: 29.09.2023

Approval date: 10.12.2023

Publication date: 21.12.2023

CITE DOWNLOAD