Near-surface absorption compensation technology and its application in the Daqing Oil Fields
Shi Zhan-Jie1,2, Tian Gang1, Wang Bang-Bing1, and Chen Shu-Min2
1. Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China.
2. Exploration and Development Research Institute of Daqing Oilfield Co. Ltd., Daqing 163712, China.
Abstract High-frequency seismic data components can be seriously attenuated during seismic wave propagation in unconsolidated (low-velocity) layers, resulting in reduced seismic resolution and signal-to-noise (S/N) ratio. In this paper, first, based on Wiener filter theory, inverse filter calculations for near-surface absorption attenuation compensation were accomplished by analysis of the direct wave spectral components from different distances near the surface. The direct waves were generated by detonators in uphole shots and were acquired by receivers on the surface. The spatially varying inverse filters were designed to compensate for the frequency attenuation of 3D pre-stack CRG (common receiver-gather) data. After applying the filter to CRG data, the high frequency components were compensated with the low frequencies maintained. The seismic resolution and S/N ratio are enhanced and match better with synthetic seismograms and better meet the needs of geological interpretation.
This work is supported by China Petroleum Technology Innovation Fund Project (Grant No. 0610740122).
Cite this article:
SHI Zhan-Jie,TIAN Gang,WANG Bang-Bing et al. Near-surface absorption compensation technology and its application in the Daqing Oil Fields[J]. APPLIED GEOPHYSICS, 2009, 6(2): 184-191.
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2009, Vol. 6 
