@Article{fdmp.2024.056729,
AUTHOR = {Zhuang Liu, Tingen Fan, Qianli Lu, Jianchun Guo, Renfeng Yang, Haifeng Wang},
TITLE = {Modeling of Thermal Shock-Induced Fracture Propagation Based on Phase-Field Approach},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {21},
YEAR = {2025},
NUMBER = {4},
PAGES = {851--876},
URL = {http://www.techscience.com/fdmp/v21n4/60854},
ISSN = {1555-2578},
ABSTRACT = {
Thermal shock damage in deep shale hydraulic fracturing can impact fracture propagation behaviors, potentially leading to the formation of complex fractures and enhancing gas recovery. This study introduces a thermal-hydraulic-mechnical (THM) coupled fracture propagation model relying on the phase field method to simulate thermal shock-induced fracturing in the deep shale considering dynamic temperature conditions. The validity of this model is confirmed through comparison of experimental and numerical results concerning the THM-coupled stress field and thermal cracking. Special attention is paid to the interaction of thermal shock-induced fractures in deep shale that contains weak planes. The results indicate that thermal shock-induced stress significantly amplifies the tensile stress range and deteriorates rock strength, resulting in a multi-point failure pattern within a fracture. The thermal shock damage degree is closely related to the fracture cooling efficiency, suggesting that considering downhole temperature conditions in THM-coupled fracture stress field calculations is advisable. Thermal shock can activate pre-existing natural fractures and enhance the penetration ability of hydraulic fractures, thereby leading to a fracture network.},
DOI = {10.32604/fdmp.2024.056729}
}