Aliased Noise Attenuation by Matching Pursuit Using 5C Sensors for Sparse Land Seismic Acquisition

We present a method to improve the efficiency of point-receiver technology by allowing for a wider receiver spacing without compromising the noise attenuation performance. Using gradient measurement inferred from a novel 5C sensor, aliased source-generated noise can be attenuated by a matching-pursuit-based approach.

The gradient measurement is a finite-difference approximation of the vertical spatial gradient of the horizontal component, estimated by taking the difference between two vertically spaced horizontal components placed in the same sensor housing. Following from the free-surface boundary condition, the measured vertical gradient of the horizontal component can be used as an approximation of the horizontal gradient of the vertical component that is required for the noise attenuation method.

We demonstrate the effectiveness of the proposed approach on field data acquired using the 5C sensor. The recorded coherent noise modes (i.e., ground roll) are de-aliased and attenuated using the matching-pursuit-based method, combining the vertical component and its approximated spatial gradient.