沙漠深层地震资料层间多次波压制方法研究

Research on Internal Multiple Suppression Method for Deep Desert Seismic Data

沙漠地区受复杂近地表和复杂地质条件的影响,深层地震资料信噪比低,有效信号弱,多次波能量强,现有的数据驱动的多次波预测和压制方法很难奏效,严重影响工区构造、断裂及储层的成像质量,造成综合解释的困难。因此,针对沙漠深层地震资料特点,提出一种在提高资料信噪比的基础上多方法联合多次波压制的新思路。西部某沙漠区实际资料的测试结果表明:新思路提高了沙漠审查资料信噪比,有效压制了深层多次波,保护了有效信号,进一步提高了地震资料中断裂和储层成像的质量。

Due to the complex near surface huge sand dunes and the complex geological conditions,deep desert seismic data are low signal-to-noise ratio and multiples are extensively developed,they are difficulty to be identified and suppressed for the current data-driven multiple prediction and suppression methods,which require higher data quality,the existing multiples seriously affect the imaging quality of the structure,fault and reservoir,resulting in the difficulty of comprehensive interpretation.Therefore,according to the characteristics of the desert deep seismic data,a new idea of combined demultiple method is proposed based on improving the signal-to-noise ratio of seismic data.Desert field seismic data tests show that the new idea effectively improves the signal-to-noise ratio of the data,removes the multiples,protects the effective signal,and further improves the imaging quality of faults and reservoirs of the deep desert seismic data.