E3S Web Conf.
Volume 370, 20233rd International Symposium on Energy Environment and Green Development (EEGD 2022)
|Number of page(s)
|Energy Utilization and Renewable Energy Technology
|16 February 2023
Simulation of Mechanical Test in Digital Rock Affected by Rock Heterogeneity and Flow in Porous Media
School of Petroleum Engineering, China University of Petroleum (East China)
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As the main reservoir of oil and gas resources, the physical and mechanical properties of the rock are complicated. The strong heterogeneity of rock and the flow in porous media further influences the nature of stress propagation. Therefore, considering the heterogeneous particle model and fluid-structure coupling, it is very important to study the variation law of rock mechanical properties under a stress state, which lays a foundation for formation fracturing and mining. In this paper, the mechanical properties of the rock are studied by the ideal, heterogeneous, and flow models in porous media. The results show that the stress of the contact surface between particles of the same size is large. Still, the stress of the contact surface between different particles is larger, which is more likely to become the weak mechanical link of failure. When the displacement of the z-axis is the same, the x and y-axis increase the axial stress of the z-axis. The peak stress is high and more sensitive when the particle size difference is small. When water is in the pores, the rock strength obtained under consolidated undrained is greater than that under consolidated drained.
© The Authors, published by EDP Sciences, 2023
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