Influence of liquid-nitrogen freezing of gas-bearing shale rocks on their compressive strength

Influence of liquid-nitrogen freezing of gas-bearing shale rocks on their compressive strength

Any definable relation between falling temperature and the compressive strength of shale rocks should provide a useful predictive tool aiding optimization of the results of hydraulic fracturing. In this research, an automeasuring hydraulic press, a thermo-camera and the Fluent ANSYS software were us...

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Bibliographic Details
Published in:Mineralogia Vol. 49; no. 1; pp. 7 - 16
Main Author: Borek, Kinga
Format: Journal Article
Language:English
Published: Warsaw Sciendo 01-12-2018
De Gruyter Poland
Subjects:
Appliance industry
black shales
compressive strength
Freezing
Hydraulic fracturing
modelling
Optimization
Rocks
Temperature
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Summary:Any definable relation between falling temperature and the compressive strength of shale rocks should provide a useful predictive tool aiding optimization of the results of hydraulic fracturing. In this research, an automeasuring hydraulic press, a thermo-camera and the Fluent ANSYS software were used. The results of laboratory simulations, and the effects of experiments conducted on shale rocks to determine permanent changes in compressive strength, are presented. As both frozen rocks and rocks returned to room temperature show diminished compressive strength. It is suggested that prior freezing of rocks can increase the efficiency of fracturing.
ISSN:1899-8526
1899-8291
1899-8526
DOI:10.2478/mipo-2018-0002