Orthotropic medium seismic imaging method and device

The invention provides an orthotropic medium seismic imaging method and device. The method comprises the following steps: determining a corresponding Hammerton function according to phase velocity characteristics of an orthotropic medium; based on a kinematics ray tracing principle, determining a kinematics ray tracing system and a dynamics ray tracing system corresponding to the orthotropic medium by utilizing the Hammerton function, and applying the kinematics ray tracing system and the dynamics ray tracing system to obtain seismic wave travel time field information corresponding to the orthotropic medium, and performing migration processing on the orthotropic medium according to the seismic wave travel time field information to achieve seismic imaging of the orthotropic medium. According to the method, orthotropic medium ray tracing can be effectively achieved, the tracing process is efficient, reliable and high in accuracy, and then quantitative depiction of fractured reservoirs and unconventional reservo