WANG Zhaoqi1, FAN Guozhang1, DING Liangbo1, ZHANG Wei2, YE Yueming1, WANG Zongren1
1. PetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, China; 2. Shanghai Investigation, Design and Research Institute Co., Ltd., Shanghai 200335, China
Abstract：Due to the influence of natural factors such as gravity and wind, the actual sea surface exhibits dynamic fluctuations in shape. The rough sea surface lowers the estimation accuracy of the ghost wave operator in data processing, thereby affecting the deghosting effect. To study the influence of ghost waves generated under the dynamic sea surface on seismic records, this paper first combines the static rough sea surface at different moments by using the Pierson-Moskowitz (PM) wave spectrum model to generate a dynamic sea surface at continuous time which approximates a real dynamic sea surface. Then, by using the Kirchhoff approximation, the paper puts forward the modeling methods of non-pulse source ghost waves and geophone ghost waves under the dynamic sea surface. The synthetic data test shows that the proposed modeling method can effectively simulate the seismic records more in line with the actual dynamic sea surface and test the actual effect of deghosting algorithms.
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