Numerical simulation of seismic waves of bubble plumes in submarine cold seepages

Submarine cold seepages are widely distributed natural phenomena in continental marginas of the world, which are important areas of energy exploration in the future. In this paper, several typical 2D geophysical models of bubble scattering from cold seepage plumes are designed and the seismic response characteristics of their numerical simulation are observed. The key of cold spring forward simulation is to establish a scattering model of typical seismic bubble plumes in submarine cold seepages. The geophysical model of bubble scattering in cold seepages can be divided into three steps: Firstly, the stationary random scattering model is constructed, and the parameter models of bubble radius and volume fraction are designed. Then the equivalent velocity model is obtained by filling and calculating the parameter models. The model has great advantages in adaptability and flexibility, and greatly improves the reliability of seismic response. The key of forward modeling of cold seepages is to establish a scattering model of typical seismic submarine cold seepages. The research shows that the scattering energy of the plume column region is the strongest, the scattering wavefield appears obviously disorder, and has obvious directionality along the extension direction of cold seepages. The scattering energy of the plume column region is the strongest. The numerical simulation results of a complex cold seepage bubble scattering model show that the seismic response can accurately describe the submarine cold seepage plume, which is of great significance to the study of cold seepage plume and the exploration of marine natural gas resources.