【摘要】 针对南黄海盆地浅水区域,利用拟Q谱法反演Q值来建立大致符合工区实际的吸收衰减模型,并使用射线参数泰勒展开法,计算地层累积吸收衰减量在不同偏移距、不同频率和不同深度下的变化情况。在此基础上,建立了理论速度模型,并利用二维有限差分声波方程模拟技术进行单炮地震记录正演,通过速度谱分析,以了解该工区浅水域多次波的发育情况。理论与实际数据分析显示,该工区的浅层衰减占主导作用,多次波能量较强,干扰严重。更多还原

【Abstract】 Aiming at the shallow water areas of the South Yellow Sea Basin,using the Q value inversed by pseudo-Q spectral method to build a realistic absorption attenuation model.And then using the ray parameter Taylor expansion method to calculate the variation of cumulative absorption attenuation of formation in different offsets,different frequencies and different depths.On this basis,the authors build a theoretical speed model and do single shot seismic record forward modeling using two-dimensional finite difference acoustic wave equation,and through the speed spectrum analysis to understand the development of multiple waves in shallow water situation of the studied area.Theoretical and practical data analysis shows that the shallow attenuation effect take the dominant position in studied area,the energy of multiple waves is strong with serious interference.更多还原