Influence of Supercritical CO2 Fracturing Mode on the Fracture Morphology and Propagation Characteristics of Coal
Xiaodong Sun,
Kaikai Zhao,
Shibin Wang
et al.
Abstract:To investigate the fracture morphology and expansion characteristics of coal seams by different fracturing methods using supercritical CO 2 , we carried out supercritical CO 2 fracturing of coal bodies and analyzed the temporal and spatial evolution characteristics of coal body fractures based on the pressure−time curves, otoacoustic emission events, and CT structural characterization of coal samples. The following conclusions were made: (1) Tiny fluctuations were observed in the time−pressure curves before fr… Show more
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