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深水陆坡区水深急剧变化,峡谷纵横,水道复杂,形成了崎岖的海底地形地貌,严重影响到其下伏地层的地震成像,并造成地震剖面上构造形态的畸变。以南海北部白云深水区崎岖海底地貌为基础,利用高斯射线束正演模拟方法,对深水崎岖海底界面、深水崎岖海底下伏水平界面和浅水崎岖海底下伏水平界面等3个概念模型进行了地震波的激发照明与接收照明的能量分布特征研究,其结果可为深水崎岖海底地区地震采集设计提供指导。
The water depth in the deep-water slope area changes drastically, the canyon is vertical and horizontal, and the waterway is complicated. The rugged submarine topography has been formed, which severely affects the seismic imaging of the underlying strata and distorts the structural morphology of the seismic profile. Based on the rugged seafloor physiognomy of the Baiyun deepwater area in the northern South China Sea, three conceptual models of the rugged undersea interface in deep water, the submarine underwater interface in deep water and the subducted horizontal interface in shallow water are studied using the forward modeling method of Gaussian beam. The study of energy distribution characteristics of excitation illumination and receiving illumination can provide guidance for seismic acquisition design in the deep and deep water of the deep sea.