#TITLE_ALTERNATIVE#

• Main Author: (NIM 12304017); Pembimbing : Dr. Alfian Bahar, TAUFIQURRAHMAN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/13139
• Institution: Institut Teknologi Bandung

Zero offset method from multi-coverage pre-stack data is a standard process in seismic data processing. It increases the signal to noise ratio and reduces the amount of data for easier furthermore processes. However, conventional stacking which used NMO/DMO stack is very dependent on velocity model, whereas Common Reflection surface (CRS) stack useful to correcting velocity for stacking process. There will be innacurate for finding the best velocity model for stacking because of limitation of seismic frequency. This proceed from, when a source on the surface illuminates a point target in the subsurface that normal to it, information those recorded not only from the point target, but also consist of the vicinity point in a fresnel zone. With stacking all point in this fresnel zone, CRS stack uses a stacking operator that fits the recorded reflector events in the pre-stack data better than conventional stack. Stacking operator Zero Offset (ZO) CRS consist of three parameters, α, RNIP, and RN. Parameter α is defined as emergence angle of the ZO ray, RNIP and RN are parameters which associated with two hipotetical wave, NIP wave dan Normal wave. These parameters are optimized to obtain the best stacking surface in every ZO point. To show that CRS method is better than another conventional stacking, a comparation between result from CRS and conventional stacking is done in synthetic and real data. Both data processed by both method, the conventional stack and CRS stack method. Results from those processing are compared each other. Refer to this research, with appropriate parameters, CRS stack method could give better subsurface imaging than the conventional method, in application to synthetic and real data. A better understanding and analysis of Fresnel zone are required for acquiring a correct parameter to using CRS stack method.