| 摘要 |
Methods and systems that attenuate noise in seismic data. In one aspect, noise attenuation methods iteratively generate a low-speed noise model of low-speed noise recorded in the seismic data. The seismic data is arranged into a sparse seismic-data matrix. Low-speed noise refers to noise that propagates at speeds less the speed of sound in water. The low-speed noise model includes the low-speed noise and includes interpolated low-speed noise that approximates portions of the low-speed noise typically affected by spatial aliasing and streamer surface irregularities. The low-speed noise model may be subtracted from the sparse seismic-data matrix to obtain a noise-attenuated sparse seismic-data matrix. CN) CN) .. . .. . .. . .. . .. . .. . .. .. . .. .. . .. . .. . .. . .. . .. . .. . . .. .. . .. .. . .. . .. . .. . . .. .. . .. .. . .. . .. . .. . . .. .. .. .. .. . .. . . . . . . . .. . . .. . . . |
