Residual static corrections for high-density seismic data
Niu Lin1,2, Li Bing3, Wang Yanchun1,2, Liu Zhiwei4, Deng Shiguang1,4
1. Geodetection and Information Technology Institute, China University of Geosciences (Beijing), Beijing 100083, China;
2. Key Laboratory of Earth Prospecting and Information Technology, China University of Geosciences (Beijing), Beijing 100083, China;
3. Institute of Geological Process of Gas Production Branch, Daqing Oilfield Company, PetroChina, Daqing, Heilongjiang 163000, China;
4. Chinese Academy of Geological Sciences, Beijing 100037, China
Abstract:With high S/N ratio, high resolution, and high fidelity, high-density seismic data need better static corrections to be processed than conventional seismic data. The widely used tomographic inversion statics can properly solve the problem of long wavelength corrections, but cannot solve the problem of short wavelength corrections. Based on theoretical analysis and field data study, we propose in the paper comprehensive static correction approach including multi-domain iteration residual refraction statics, sub-frequency-band model iteration residual statics, and nonsurface-consistent residual statics to calculate residual statics for high-density seismic data in order solve both long wavelength corrections and short wavelength corrections. Applications to field data show the effectiveness of the proposed approach.
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