多次波压制技术在北非ZD工区地震资料处理中的应用

Application of Multiple Suppression Technology in Seismic Data Processing in ZD Area of North Africa

多次波周期性的出现在地震资料中,尤其是层间多次波常常混合在有效信号中,难以区分,影响了成像的真实性,给地震资料解释带来困扰。可以根据多次波在速度谱、常速扫描叠加剖面以及CMP动校道集上的特征来识别多次波。运用高精度拉动变换可以有效地压制多次波,提高地震资料的信噪比和保真度。

Multiples periodically appear in seismic data,especially interlayer multiples are often mixed in useful signals,which are difficult to distinguish,that affects the authenticity of imaging and brings difficulties to the interpretation of seismic data.The multiples can be identified based on the characteristics of the multiples on the velocity spectrum、the constant-speed scanning stack profile、and the CMP NMO gather.The use of high-precision Radon transform can effectively suppress multiples and improve the signal-to-noise ratio and fidelity of seismic data.