【摘要】 地震数据处理中二维情况下的表面多次波压制(SRME)算法已很成熟;但在三维情况下,当地下地层在横测线方向存在一定倾角时,利用二维SRME算法进行多次波预测存在一定误差,且通过自适应相减无法弥补所预测多次波模型的误差,因此开发了三维SRME算法。由于地震数据采集的限制,三维情形下震源和检波器在横测线方向分布过于稀疏,直接将二维SRME算法拓展到三维无法准确预测多次波。本文假定三维情况下每道记录对应的多次波贡献道集是一个双曲线形态,通过对对应多次波贡献道集进行稀疏反演,实现了三维情况下多次波的预测。模拟三维数据的处理结果验证了方法的可行性与有效性。更多还原

【Abstract】 2D SRME algorithm is quite efficient,but it brings some errors in 3D multiple prediction when underground layers have a dip angle in the cross lines direction,and the adaptive subtraction is unable to compensate these errors.Therefore we develop a 3DSRME algorithm.Due to data acquisition limitation,source and receiver intervals in cross line directions are too sparse,and 2Dalgorithm cannot predict the exact multiples for 3Ddata.Assuming that a multiple contribution gather relative to a seismic trace has a shape of hyperbolas,we can conduct a sparse inversion to this corresponding multiple contribution gather to predict multiples of the trace.3D model data tests verify the feasibility and validity of the proposed SRME algorithm.更多还原