Authors: V.A. Khyamyalyaynen, M.A. Bayev, A.G. Shevtsov

Title of the article: About the influence of the strain-stress state of coal seam on the propped fracture permeability

Year: 2017, Issue: 6, Pages: 121-126

Branch of knowledge: Earth sciences

Index UDK: 622.324.5

DOI: 10.26730/1999-4125-2017-6-129-134

Abstract: The analysis of the ways of methane production stimulation from virgin coal formations is given. The description of the process of hydraulic fracturing (fracturing) as the most common stimulation method during the commercial coalbed methane production as well as its major advantages are presented. Key factors af-fecting the residual permeability of fractures created after the fracturing are subsurface conditions and features of the restraining material (proppant), most commonly, the conventional quartz sand sorted according to particles size. The influence of the strain-stress state of the rock massif on the alteration of permeability and the necessity of its extension study with respect to different technological features of hydraulic fracturing is shown. Results of laboratory study of sands collected from Kemerovo region deposits for the purpose of finding the most prospective samples for fractures propping are presented. The potential and ability to implement the hydraulic fracturing with the use of locally available sands acting as proppants are shown.

Key words: Coalbed methane hydraulic fracturing proppant sand permeability strain-stress state rock massif

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