Combining Acquisition & Processing Techniques To Reduce Ground Roll On 3D Land Data

The extension of the stack array noise reduction mechanism to 3D replaces the linear segment of the<br>recording spread by a disk, the linear source and receiver arrays by square arrays, and the high linear density<br>of source and receiver stations by high areal densities at a very high cost. Compromises are therefore<br>necessary. This paper analyses their consequences on the filtering properties of 3D acquisition geometry<br>associated or not with linear orthogonal source and receiver arrays. Various designs are compared before<br>and after noise reduction in the FKxKy domain.