| 摘要 |
A marme seismic data acquisition system, compnsmg: a se1sm1c source arrangement comprising: a first seismic source adapted to be placed at a first predetermined depth and a second seismic source adapted to be placed at a second predetermined depth, which is deeper than the first predetermined depth, wherein, in use, the first seismic source transmits pulses, each pulse comprising an upwardly-travelling pressure wavefield, which is reflected at the sea/air interface to become a downwardly-travelling ghost pressure wavefield, and a downwardly-travelling primary pressure wavefield, and the second seismic source transmits pulses, each pulse comprising an upwardly-travelling pressure wavefield, which is reflected at the sea/air interface to become a downwardly-travelling ghost pressure wavefield, and a downwardly-travelling primary pressure wavefield, and wherein the first predetermined depth and the magnitude of the peak pressure of the upwardly-travelling pressure wavefield produced by the first seismic source are selected to cause anelastic behavior at the sea surface, and the first and second seismic sources are arranged to be synchronised such that their respective downwardly-travelling primary wavefields constructively interfere with each other, the system further comprising a receiver for receiving the pulses transmitted from the seismic source arrangement and for extracting data from within a predetermined frequency band of interest. |
