Improving Structural Image of Old Seismic Vintage Using Partial Common Reflection Suface (CRS) Stack (2011)



The quality of reflection data is very important for seismic processing. The quality of old seismic data seems to be so noisy and low in CMP fold. That’s why we often meet this old seismic data in poor quality. Regulation and filling the gap might help this problem, yet we have to face the noise increasing and the limitation of fold. Common Reflection Surface (CRS) stack is a new method that can enhance the quality of seismic data. We apply CRS stacking method in real data. Based on the CRS traveltime formula, where the dip of the reflector element is incorporated, the SN ratio of the data can be significantly increased by applying partial stacked CRS supergathers. In CRS supergathers, each trace is a result of data summation along CRS stacking surface. The number and location of traces in the produced supergathers can be defined to fill the offset missing area. The results show that CRS method can increase fold as many as we need. The coherence noise in seismic data also can be decreased, because there is no interpolation in this method, but only summation of data is performed.


Author : Delvya Mayasari, Bambang Avianthara