| 摘要 |
A method of deghosting seismic data using a model, the seismic data having been captured at a location below the sea surface and the model comprising a wave-propagation space having the wave propagation properties of sea-water, the method comprising: a. injecting into the model a seismic wavefield based on the seismic data at an injection location in the model corresponding to the location at which the seismic data was captured, and allowing the injected seismic wavefield to propagate through the wave-propagation space; b. recording the propagating seismic wavefield at a recording location in the model, the recording location being located at a distance from the injection location of twice the depth of the location below the sea surface at which the seismic data was captured; c. scaling or convolving the recorded seismic wavefield with a reflection coefficient, R; and d. adding the scaled or convolved seismic wavefield to a subsequent seismic wavefield, which is based on a corresponding subsequent portion of the seismic data, the subsequent seismic wavefield being the seismic wavefield that is to be injected at the injection location at the same time as the propagating seismic wavefield passes the recording location. |
