基于视速度的波场变换的叠前强相干噪音压制技术

Coherent Noise Elimination Technique Based on Wave Field Transform Using Apparent Velocity

针对叠前强横速相干噪音(如多次折射波、声波、面波),提出了基于视速度的波场变换叠前强相干噪音压制技术,该技术由基于视速度的波场变换技术和非线性滤波以及奇异值分解(SVD)滤波技术组成。首先由基于视速度的波场变换技术提供变换波场,然后,在变换波场上进行相应的滤波,最后将经过滤波处理的道集通过逆波场变换得到被压制噪音的叠前数据。着重分析了非线性滤波技术,同时也对基于视速度的波场变换叠前强相干噪音压制技术的原理、实现步骤、应用条件及效果给予了详细描述。

The authors elaborate a noise elimination technique for pre-stack high energy coherent noise, such as multiple-refractions, sound waves, and surface waves. It combines the apparent velocity wave field transform technique, non-linear filtering and the singular value decompose （SVD） filtering. Apparent velocity based wave field transform produces the transformed wave field. Filtering is then applied. The noise eliminated pre-stack data are obtained by performing the inverse wave field transform on the filtered channel set. More attention is paid to the non-linear filtering technique. A detailed description on the principle, procedure, application and validation of the coherent noise elimination technique is provided.