Sequential Backus Averaging can be applied prior to the calculation of well log reflectivity coefficients (RFCs). This feature can be helpful when working with highly variable and/or misaligned well logs.

Backus averaging is a useful method to upscale / average thin and laminated lithologies of varying properties. When enabled, well logs are upscaled over a sliding window prior to the calculation of reflectivities.

In The Rock Physics Handbook, Mavco suggests a wavelength 10x the layer thickness, i.e. for .5m bands of lithology start with a minimum of 5m. Most spikes and very high frequency noise are filtered naturally by the convolution with the wavelet.