Numerical Analysis on Shale Crack Model under Explosive Loading

2019 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

无线电电子学;计算机科学;材料科学

Peng, Y.^1 ; Liu, X.L.^1

School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, Sichuan

621010, China^1

关键词: Crack networks;    Explosive loadings;    High energy gas fracturing;    High temperature and high pressure;    Mechanical performance;    Oil and gas production;    Oil and gas reservoir;    Sichuan province;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/563/5/052052/pdf
DOI  :  10.1088/1757-899X/563/5/052052

来源: IOP

【 摘 要 】

High Energy Gas Fracturing (HEGF) technology can produce self-supporting crack network in rocks of oil and gas reservoirs under a large number of high temperature and high pressure explosive shock wave caused by explosive detonation. It is expected that the reservoir conductivity will be improved by generating the new crack channels for oil and gas flow, so as to achieve the goal of increasing oil and gas production. However, the numerical study on the crack initiation, extension and propagation of rock under blast loading is still insufficient, which plays a vital role in better understanding the mechanical performance of rocks in the HEGF process. In the present study, taking the typical shale gas demonstration area in Sichuan province as an example, the shale crack model is established, the mechanical properties of shale rock with cracks under explosive loading are studied, the evolution laws of crack propagation are analyzed, and the damage characteristics of crack tip are considered.