Author(s)

Xin Liu

Corresponding Author

Xin Liu

ABSTRACT

Multi-wave seismic exploration can use converted wave information, and more underground geological information can be obtained compared with conventional P-wave exploration. Compared with the traditional acoustic wave reverse-time migration method, elastic wave reverse-time migration can provide more physical information of underground structures. However, the crosstalk noise and various non-physical noises in the migration seriously reduce the imaging quality. On the premise of accurate velocity model and other parametric models, the elastic wave reverse migration method is used to image the elastic wave data. The key technology in this process is to use Poynting vector to separate the wave field and calculate the angle, so that the elastic wave reverse migration can generate multiple sets of imaging gathers with dip angle as the index. The converted wave data in complex structural areas usually have low signal-to-noise ratio, and the static correction problem is very serious, so it is difficult to realize the correct imaging of converted wave. In this paper, the processing method of 3D converted wave is studied and applied, and the strategy of improving the imaging efficiency and effect of converted wave is put forward to realize the accurate imaging of 3D converted wave.

KEYWORDS

Converted wave; Imaging efficiency; Strategy