Publications

One of the main objective of seismic processing is to remove noise in seismic data to get better subsurface image. This filtering process is generally performed in common shot gather. Noises in seismic data can be analyzed by sorting it in different domain. Most common noises such as ground roll and multiple can be seen in shot gather. But several random noise and coherent noise could be better analyzed in common receiver gather. The random noise in seismic data cannot be predicted so in this study we want to show that removing noises in common receiver gather could help to increase seismic stack quality compared with noise attenuation in shot gathers. This study is done using synthetic data. The geometry used in the data seismic data measurement is the fixed station array. The measured trajectory length is 150m. The number of shot used is 151 with a shot interval of 1m, while using 24 channels of receiver with a receiver interval of 6m. The acquired data is then sorted from common shot gather (CSG) to common receiver gather (CRG). Furthermore, seismic data are processed with conventional flow to get seismic stack. Both seismic data in common shot gather domain and common receiver gather domain are processed with the same flow, which is bandpass filter, deconvolution, time variant spectrum balancing, velocity analysis, and stacking. The results show processed data with noise attenuation in common receiver gather are better especially at showing subsurface layer than data with noise attenuation in common shot gather. A better and improved image is shown because pre-stack result show less noises than seismic data in common shot gather.