公开(公告)号：US20240264322A1

公开(公告)日：2024-08-08

申请号：US18641022

申请日：2024-04-19

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Gang LI ,  Yaohui XUE ,  Zhiqian DONG ,  Dinghao YU ,  Hongnan LI

IPC: G01V1/28 ,  G01V1/32

CPC classification number: G01V1/284 ,  G01V1/32

Abstract: The present invention provides a multi-phase wavefield inversion method considering both body waves and surface waves in half-space of rock media to address the deficiency in existing methods that neglect surface wavefields. In the present invention, Rayleigh components that strictly satisfy standard elliptic polarization characteristics in a half-space are extracted with Snell's Law of complex angles and the forward modeling and inversion theory of body waves. Then, the phase separation is executed to separate the body and Rayleigh waves. The pre-arrival components of S-waves are truncated to solve optimal incident angles of body waves. Thus, a Rayleigh wavefield inversion is implemented with ground Rayleigh components, and a body wavefield inversion is implemented with ground body components and their incident angles. Finally, based on linear elastic characteristics of the half-space of rock media, single-phase body wavefields and Rayleigh wavefields are superposed to form total multi-phase wavefields with the linear superposition principle.