Reverse time migration imaging method based on passive converted wave

• Main Authors: WANG LIFENG, HU LIN, SUN WANYUAN, MA GUANGKE, LI FANG, LI XIAOZHANG
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2024
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention relates to the field of seismic exploration, in particular to an imaging method based on passive converted wave reverse time migration. Different from traditional cross-correlation imaging in reverse time migration, the technology does not need to carry out continuation of a shot point wave field, only needs to carry out reverse time continuation of a receiving point wave field, and carries out cross-correlation imaging by utilizing longitudinal wave and transverse wave fields in the receiving point wave field in the reverse time continuation process. Therefore, the method is not only suitable for transverse wave imaging in active source multi-wave seismic data, but also suitable for transverse wave imaging of passive source multi-wave data. In addition, under the same condition, the calculation efficiency of the method is three times that of an existing elastic wave reverse time migration technology, and the memory requirement is one half that of the prior art. According to the method, a multi-