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基于深水断裂地区的地震偏移剖面建立深水断裂结构地层地震地质模型;基于射线正演模拟及地震波在弹性分界面上的能量分配,计算不同偏移距范围内的覆盖次数及其反射波平均振幅,基于这些参数来确定靶区地震勘探最优采集参数。分析结果表明,靶区深水断面使得射线偏折得严重必须增加排列长度,才能使得断面波能得到较好的偏移成像,同时,指出在复杂断裂地区地震勘探必须选择合适的排列长度和覆盖次数才能确保保幅成像处理,针对靶区,勘探排列长度范围应在8000~10000m。
Based on the seismic migration profile in the deep-water fault region, the seismic geological model of the deep-water fault structure strata is established. Based on the forward modeling of the radiation and the energy distribution of the seismic wave at the elastic interface, the coverage times and the average amplitude of the reflected waves , Based on these parameters to determine the optimal seismic acquisition parameters of the target area. The results show that the cross section wave can be well offsetted by increasing the length of the array when the deepwater section of the target makes the beam deflection seriously, and at the same time it is pointed out that the seismic exploration in complex fault areas must select the appropriate length and coverage In order to ensure the FP imaging process, for the target area, the length of the exploration arrangement should be 8000 ~ 10000m.