塔河地区石炭系盐体对地震参数及成像精度的影响

The effect of carboniferous salt-body on seismic parameters and imaging in Tahe area

中国石化西北石油局,新疆乌鲁木齐 830011

Northwest Petroleum Bureau, SINOPEC, U-rumchi. 830011, China

为探讨塔里木盆地塔河地区盐体对下伏地层的影响,选择了一块具有代表性的区块.从速度、振幅、频率、偏移等方面进行了分析。首先对该区块的地震资料进行了重新处理;然后对DMO叠加速度以及炮域波动方程和克希霍夫叠前深度偏移剖面进行了对比分析;最后提取了下伏地层地震反射波的振幅和频率,探讨了盐体对地震波运动学和动力学参数的影响。结果表明,盐体对下伏地层的成像精度以及地震波的振幅和频率影响不大。

Selected a typical block in the Tahe area, aimed at the explanation and development to the under-salt formation structure, velocity, amplitude, frequency and migration are analyzed. Rehandle the seismic data on this area; comparative analysis on DMO stacking velocity, wave equation and Kichoff prestack depth migration section; at last, extracting the amplitude and frequency for seismic reflection wave in underlying formation, study on the effect of the salt to seismic wavet kinematics and kinetic parameters. As a result, it is not effort on imaging accuracy and seismic parameters.