Abstract：
There are some limitations when we apply conventional methods to analyze the massive amounts of seismic data acquired with high-density spatial sampling since processors usually obtain the properties of raw data from common shot gathers or other datasets located at certain points or along lines. We propose a novel method in this paper to observe seismic data on time slices from spatial subsets. The composition of a spatial subset and the unique character of orthogonal or oblique subsets are described and pre-stack subsets are shown by 3D visualization. In seismic data processing, spatial subsets can be used for the following aspects: (1) to check the trace distribution uniformity and regularity; (2) to observe the main features of ground-roll and linear noise; (3) to find abnormal traces from slices of datasets; and (4) to QC the results of pre-stack noise attenuation. The field data application shows that seismic data analysis in spatial subsets is an effective method that may lead to a better discrimination among various wavefields and help us obtain more information.
CAI Xi-Ling,LIU Xue-Wei,LI Hong et al. Seismic data analysis based on spatial subsets[J]. APPLIED GEOPHYSICS, 2009, 6(4): 354-362.
[1]
Cai, X. L., and Lu, Y. M., 2005, Time-frequency analysis and frequency-divisional processing of seismic data: Progress in Exploration Geophysics, l28(4), 265 - 270.
[2]
Cai, X. L. Liu, X. W., Wang, Y. J., Lu Y. M., Nie, H. M., 2006, Surface-consistence statistical autocorrelation of seismic data: Geophysical Prospecting for Petroleum, 45(4), 390 - 396.
[3]
Di, B. R., Xiong, J. L., and Yue, Y., 2006, Analysis on influence of bin size on resolution of seismic imaging: study of acquisition parameters based on seismic physical modeling: Oil Geophysical Prospecting, 41(4), 363 - 368.
Marfurt, K. J., Scheet, R. M., Sharp, J. A., and Harper, M. G., 1998, Suppression of the acquisition footprint for seismic sequence attribute mapping: Geophysics, 63(3), 1024 - 1035.
[6]
Peng, Q. Z., Shao, H. Z, and Li, M., 2006, Signal analysis: Electronics Industry Publishing House, China, 145 - 165.
[7]
Rietveld, W. E., Kommedal, J. H., and Marfurt, K. J., 1999, The effect of 3-D prestack seismic migration on seismic coherence and amplitude variability: Geophysics, 64(5), 1553 - 1561.
[8]
Zhang, X. D., 2002, Modern signal processing (the second edition): The Tsinghua University Publishing House, China, 263 - 278.
2009, Vol. 6 
