Comparison of wave field characteristics among the fracture rock models
Zhen Jingjing1,2, Liu Yang1,2, Li Min1,2
1. State Key Lab of Petroleum Resources and Prospecting, China University of Petroleum (Beijing),Beijing 102249, China;
2. CNPC Key Lab of Geophysical Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
Abstract：This article focuses on comparing among the first-order accuracy Hudson model, the second-order accuracy Hudson model, the Schoenberg model,the Kachanov model and the Eshelby-Cheng model.The paper summarizes the expressions of elasticity coefficient of the different models.Elastic wave equation numerical simulation is used to simulate propagation characteristics of waves in these fracture models respectively for dry fracture and water-filled fracture with different fracture density and fracture aspect ratio.And wave field snapshots and the phenomenon of shear-wave splitting from the simulation are analyzed.The following observations are obtained from the study：The fracture density affects the anisotropy feature of the P- and S-waves and the fracture fillings inlluence the anisotropy of the medium; while the fracture aspect ratio and the fracture fillings impact on the propagation characteristics of shear waves.Shear-wave splitting changes significantly with the increasing crack density, but the fracture aspect ratio and the fracture fillings have little effect on shea-wave splitting.
镇晶晶, 刘洋, 李敏. 几种裂缝模型的波场传播特征比较[J]. 石油地球物理勘探, 2012, 47(6): 908-917.
Zhen Jingjing, Liu Yang, Li Min. Comparison of wave field characteristics among the fracture rock models. OGP, 2012, 47(6): 908-917.
