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由于转换横波传播路径的非对称性,使得转换横波的静校正与纵波有很大的不同.目前大多数静校正方法都是基于地表一致性假设提出的,而抽取转换波CCP道集的方法通常会使炮检关系破碎,同一道中不同时间的转换波数据对应不同的炮点与接收点位置.为此,提出了一种基于模型道的时变静校正方法.该方法以模型道波峰为基准将道集分为不同的时窗,各时窗中各采样点按一定准则分别进行时移校正.最后,给出了该方法在模型数据以及和顺二维三分量转换横波静校正处理中的应用效果,表明时变静校正在解决转换波静校正时具有一定的技术优势,提高了地震资料的信噪比,取得了较好的效果.
Due to the asymmetry of the translational shear wave propagation path, the static correction of the converted shear wave is greatly different from that of the longitudinal wave. At present, most of the static correction methods are proposed based on the assumption of surface consistency, and the method of extracting the converted wave CCP gather is usually The relationship between shots will be broken, and the converted wave data at different time in the same track will correspond to different positions of shots and receive points.Therefore, a time-varying static correction method based on model track is proposed, which is based on the model peak The time series are divided into different time windows and the sampling points of each time window are time-shifted respectively according to certain criteria.Finally, the application of this method to the model data and the transthoracic static correction of two-dimensional three-component transformation The results show that time-dependent static correction has certain technical advantages in resolving the static correction of converted waves and improves the signal-noise ratio of seismic data, and achieves good results.