Research on wavelet consistency processing methods of GeoEast and its application in emerging data
ZHANG Chunyan1, LI Yaxu2, WANG Xiaolin3, HOU Shanhong3
1. PetroChina Hangzhou Institute of Geology, Hangzhou, Zhejiang 310023, China; 2. Research Institute of Geology of CNPC Logging, Xi'an, Shaanxi 710000, China; 3. Geophysical Prospecting Research Institute, Jilin Oilfield Company, PetroChina, Songyuan, Jilin 138000, China
Abstract：In seismic data processing, it often needs to process emerging data of different acquisition parameters, among which wavelet consistency processing plays a vital role in improving imaging quality and spatial resolution. After using static correction technology to eliminate the time difference of data, we employ the characteristic processing modules of the GeoEast system to establish the technical flow of wavelet consistency processing for data acquired under different conditions. On the basis of fidelity denoising, firstly, the amplitude processing module is used to complete the energy consistency processing, especially the use of the frequency-division amplitude compensation technology for improvement in the high-frequency energy absorption problem caused by near surface. Then, through surface-consistent deconvolution, the near-surface reverberation and reflection of wavelets are eliminated. Finally, a shaping factor is designed on the basis of the characteristic difference in the overlapping data of different areas to further eliminate the difference in excitation wavelets. The actual data processing results show that after the emerging consistency processing, the overall signal-to-noise ratio and resolution of the data are improved. The source wavelets of different types tend to be consistent, and the frequency and phase characteristics of spatial wavelets are consistent. The frequency and phase consistency of wavelets is verified by the along-layer attribute of the standard reflection layer.
张春燕, 李亚旭, 王晓琳, 侯山红. GeoEast融合数据子波一致性处理技术及其应用研究[J]. 石油地球物理勘探, 2022, 57(s2): 29-34.
ZHANG Chunyan, LI Yaxu, WANG Xiaolin, HOU Shanhong. Research on wavelet consistency processing methods of GeoEast and its application in emerging data. Oil Geophysical Prospecting, 2022, 57(s2): 29-34.
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