关键词: 三维转换波, 静校正量, 表层模型, 共检波点叠加, 剩余静校正, 纵横波联合

Abstract: The static correction of converted wave is far complicated than that of P-wave, and it directly influences the imaging quality of the converted wave. On the basis of 3D3C seismic data in Lamadian studied area, the statics are corrected via step-by-step solution from large to small of statics. The model method is firstly adopted to solve the problem of the static component of the long wave length related with the datum level, and then by using the reflection information of P-wave and converted wave on common receiver stack profile, the medium-long wave length can be dealt with. Finally, the same task for the short wave length can be also completed through surfaceconsistent residual static correction. The practical results show that the 3D converted wave imaging profile in Lamadian studied area is accordant with the P-wave profile in styles of structure and fault, furthermore, the wave group sustains the individual characteristics of Pwave and S-wave, thus the above achievements have laid the foundation of the petrophysical property analysis of the reservoirs using Pwave and S-wave combination.

Key words: 3D converted wave, statics, surface model, common receiver stack, residual static correction, P-wave and S-wave combination