Abstract
Permeability improvement of coal seams by hydraulic fracturing can promote desorption of coalbed methane. However, the water-block effect will restrain desorption of coalbed methane. Based on the e...
Highlights
Hydraulic fracturing technology currently plays an important role in the exploitation of coalbed methane (CBM)
Hydraulic fracturing in coal-rock mass can transform a reservoir with low permeability, low reservoir pressure, and a low gas saturation level, thereby improving the production of CBM wells
In the process of hydraulic fracturing, high-pressure water will flow within the channel system, which consists of cleats, micro-fractures, and pores in the coal seam
Summary
Hydraulic fracturing technology currently plays an important role in the exploitation of coalbed methane (CBM). The flowing fracturing fluid in the pores and fractures will generate water pressure, resulting in gas displacement and competitive adsorption (Gensterblum et al, 2014; Huang et al, 2016; Ottiger et al, 2008). In the process of hydraulic fracturing, high-pressure water will flow within the channel system, which consists of cleats, micro-fractures, and pores in the coal seam.
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