Effective elastic properties for 3D real fractures based on finite-element modeling

• DOI: 10.1190/iwmg2021-30.1
• Publication Date: 2022-02-24T22:32:20Z
• Authors: Jian Shikai; Fu LiYun; Zhou Yuxuan; Cao Xinxin; Cui Lijie
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

Real fractures are usually multiscale in orientations, sizes, and distributions, resulting complex anisotropic characteristics. Analytical methods for effective elastic properties based on some assumptions, such as dilute fracture concentration regular-shaped fractures, which do not occur actual reservoirs. Here, finite-element modeling of is conducted fractured rocks by a least-squares fitting procedure. The algorithm extended to 3D cases validated classical medium theories models with different densities. results agree well the theoretical predictions at low density. model also considers interactions among calculate equivalent stiffness tensors high We applied real built from natural outcrop, we found that fracturing pattern significantly affects anisotropy properties. resultant P-wave phase velocities functions incidence angle frequencies anisotropic. This study provides great potential fractures.