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| A WAVEFIELD RECONSTRUCTION APPROACH BASED ON WEIGHTED PARABOLIC RADON TRANSFORM |
| SHI Ying1,2, KE Xuan1, WANG Wei-hong3 |
1. School of Earth Sciences, Northeast Petroleum University, Daqing 163318, China;
2. Postdoctor Workstation of Daqing Oilfield, Daqing 163453, China;
3. Exploration and Development Research Institute of Daqing Oilfield Corp. Ltd. , Daqing 163712, China |
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Abstract A weighted parabolic Radon transform approach is proposed based on the basic principle and computation method of conventional band-limited forward and inverse parabolic radon transform.The proposed algorithm is applied to prestack seismic wavefield restoration and reconstruction,such as the missing offset interpolation and anti-alias resampling in the offset direction;The weight coefficient is determined by seismic data in x-τ domain,i.e.,the weight coefficient varies in different iteration processes.For the seismic data from uniform sampling,this paper gives the reconstruction result of missing near offset extrapolation and resampling for anti-alias seismic data.The test results demonstrate that the presented weighted parabolic radon transform is effective for seismic wavefield reconstruction,with the characteristics of robustness,high precision and high efficiency.
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Received: 17 October 2011
Published: 10 October 2012
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