Pore structure characterization of sandstone under different water invasion cycles using micro-CT

• DOI: 10.1007/s40948-023-00696-z
• Publication Date: 2024-02-22T13:02:32Z
• Authors: Weizheng Mao; Yujing Yao; Zhe Qin; Yongde Liu; Jihuan Han; Zhen Liu
• Keywords: Micro-CT; QC801-809; Geophysics. Cosmic physics; Water invasion cycles; Pore structure; Damage characterization; 01 natural sciences; 0105 earth and related environmental sciences

Abstract The meso-structural changes of rocks during repeated cycles water invasion are the fundamental cause macroscopic physical property damage. In this paper, based on computed tomography scan images rock samples under different numbers cycles, a three-dimensional pore network model was constructed to analyze in structure action invasion. damage variable introduced quantitatively characterize parameter each and reveal evolution meso-damage. results show that 81% radius is less than 10 μm 0 76% radiuses after cycles. After peak range distribution enlarged from initial 2–4 4–6 proportion throats with decreased an 82–72%. With increase large pores increased connectivity among enhances gradually. changed most 2–5 maximum degree volume reached up 41.44% minimum coordination number 5.80%. test helped