关键词: 浅水多次波, 多次波衰减, 表面多次波压制, Radon变换, 渤海海域

Abstract: Focusing on the development characteristics of shallow-water multiple in LD zone of Bohai Sea, a complete set of joint shallowwater multiple attenuation technique is proposed in this article. First of all, the SWD approach is used to eliminate most of short-period multiples related to the sea bottom. Secondly, the 2D surface-related multiple suppression approach is used to effectively eliminate the remaining surface-related long-period multiples. Thirdly, the Radon transform is used to separate the residual multiples after 3D harmonization. Finally, the high-precision Radon transforms used to attenuate multiples in the CIP gather after pre-stack time migration. This method reasonably combines the SWD technology with the traditional multiple separation technology to attenuate multiples. Processing of offshore seismic data from Bohai Sea region indicates that the above-mentioned method can effectively attenuate shallow-water multiples. The joint shallow-water multiple attenuation processing technique is fast and simple while the amplitude is well kept after processing of seismic data.