International Scientific Journal


The use of liquid nitrogen fracturing can effectively improve the permeability of unconventional natural gas reservoirs. In order to explore the impact of liquid nitrogen cooling on the tensile failure behavior of coal and sandstone, a series of physical and Brazilian splitting tests were conducted on coal and sandstone. Compared with the control group, the velocity, tensile strength, and splitting modulus reduction of coal were 24.7%, 19.7%, and 52.4%, respectively, and the corresponding reductions for sandstone were 5.5%, 14.7%, and 15.4%. Energy analysis and failure characteristics demonstrated that liquid nitrogen cooling promoted widespread distribution of internal damage in coal and sandstone, and the degree of internal structure damage determined the complexity of the failure mode. The greater the internal damage, the more branch cracks occurred during failure, and the greater the path tortuosity and degree of fragmentation.
PAPER REVISED: 2023-08-18
PAPER ACCEPTED: 2023-11-01
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 2, PAGES [1141 - 1147]
  1. Huang, Z. W., et al., A Review of Liquid Nitrogen Fracturing Technology, Fuel, 266 (2020), 4, ID117040
  2. Hong, C. Y., et al., Enhance Liquid Nitrogen Fracturing Performance on Hot Dry Rock by Cyclic Injec­tion, Petroleum Science, 20 (2023), 2, pp. 951-972
  3. Mcdaniel, B. W., et al., Field Applications of Cryogenic Nitrogen as A Hydraulic Fracturing Fluid, Pro­ceedings-SPE Annual Technical Conference and Exhibition, 50 (1998), 3, pp. 561-572
  4. Li, H., et al., A Fully Coupled Electromagnetic-Thermal-Mechanical Model for Coalbed Methane Ex­traction with Microwave Heating, Journal of Natural Gas Science and Engineering, 46 (2017), 10, pp. 830-844
  5. Hou, P., et al., Influence of Liquid Nitrogen Cooling State on Mechanical Properties and Fracture Charac­teristics of Coal, Rock Mechanics and Rock Engineering, 55 (2022a),7, pp. 3817-3836
  6. Hou, P., et al., Effect of Liquid Nitrogen Freeze-Thaw Cycle on Fracture Toughness and Release Rate of Saturated Sandstone, Engineering Fracture Mechanics, 258 (2021), 10, ID108066
  7. Su, S. J., et al., A Fractal Perspective on Structural Damage and Fracture Characteristics of Coal Subjected to Liquid Nitrogen Cooling at Laboratory-Scale, Fractals, 30 (2022), 4, ID2250080
  8. Qin, L., et al., Changes in The Pore Structure of Lignite After Repeated Cycles of Liquid Nitrogen Freez­ing as Determined by Nitrogen Adsorption and Mercury Intrusion, Fuel, 267 (2020), 5, ID117214
  9. Su, S. J., et al., Experimental Study on Coal Permeability and Cracking Characteristics under LN2 Freeze- Thaw Cycles, Journal of Natural Gas Science and Engineering, 83 (2020), 11, ID103526
  10. Yan, M., et al., Heat-Mass Transfer Coupling Effects in Water-Ice Phase Transformation of Water-Bearing Coal Frozen with Liquid Nitrogen, Applied Thermal Engineering, 215 (2022), 10, ID118902
  11. Zhang, S. K., et al., Thermal Characteristics Analysis with Local Thermal Non-Equilibrium Model During Liquid Nitrogen Jet Fracturing for HDR Reservoirs, Applied Thermal Engineering, 143 (2018), 10, pp. 482-492
  12. Lu, Y. Y., et al., Influences of Super-Critical CO2 Saturation on Tensile Characteristics and Failure Modes of Shales, Energy, 221 (2021), 4, ID119824

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence