Stacking - and the Importance of Offset (x)

A-17 STACKING – AND THE IMPORTANCE OF OFFSET (x) INGEBRET GAUSLAND Introduction 1 Offset (x) is an important parameter in processing of seismic data but surprisingly little is documented on the impact of offset on stacking. I have in previous presentations stated that stacking is indeed a beamforming process and in this presentation I will give a more fundamental background for my earlier statements. Most geophysicists will know that mis-stacking the data by choosing a slightly higher than optimum stacking velocity will achieve additional multiple attenuation. This is due to the “beamforming” type stack response. Therefore it should be obvious