Sea surface shape derivation above the seismic streamer
Sea surface shape derivation above the seismic streamer
复制标题
地震拖缆上方海面形状推导
DOI：
10.1111/j.1365-2478.2006.00583.x
复制
发表时间：
2006
影响因子：
2.6
通讯作者：
E. Kragh
中科院分区：
文献类型：
--
作者：
R. Laws;E. Kragh
粗糙的海面会导致地震数据的扰动，这对时移研究可能很重要。扰动的出现是因为不平坦海洋的反射响应扰动了地震子波。为了从接收到的地震数据中去除这些扰动，可以使用特殊的反褶积方法，但是这些方法需要拖缆中的每个水听器上方的时变波高度作为输入。此外，还必须在每个水听器的位置和任何时候都知道拖缆本身的垂直位移。这种信息在常规地震采集中是不可用的。但是，如果水听器是单独记录的（而不是分组记录的），记录带宽向下扩展到0.05 Hz，记录数据时在炮点记录之间没有间隙，则可以从水听器测量中获得。
The rough sea surface causes perturbations in the seismic data that can be significant for time‐lapse studies. The perturbations arise because the reflection response of the non‐flat sea perturbs the seismic wavelet. In order to remove these perturbations from the received seismic data, special deconvolution methods can be used, but these methods require, as input, the time varying wave elevation above each hydrophone in the streamer. In addition, the vertical displacement of the streamer itself must also be known at the position of each hydrophone and at all times. This information is not available in conventional seismic acquisition. However, it can be obtained from the hydrophone measurements provided that the hydrophones are recorded individually (not grouped), that the recording bandwidth is extended down to 0.05 Hz and that data are recorded without gaps between the shot records.