| 一种加权抛物Radon变换地震波场重建方法 |
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| 引用本文： | 石颖,柯璇,王维红.一种加权抛物Radon变换地震波场重建方法[J].物探与化探,2012(5):846-850. |
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| 作者姓名： | 石颖 柯璇 王维红 |
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| 作者单位： | 东北石油大学地球科学学院;大庆油田博士后科研工作站;大庆油田有限责任公司勘探开发研究院 |
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| 基金项目： | 国家自然科学基金青年基金(41004057、41104088);国家“863”高技术研究发展计划项目(2012AA061202);中国石油科技创新基金(2011D-5006-0304);中国博士后科学基金(2011M501009);黑龙江省教育厅科学技术研究项目(12511025)联合资助 |
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| 摘 要： | 基于带限正反抛物Radon变换的基本原理和计算方法，笔者给出了一种加权抛物Radon变换（PRT）算法，该方法可应用于叠前地震波场恢复和重建，如缺失偏移距地震数据的插值外推和反假频重采样，其权系数完全由数据域来确定，也就是说在迭代计算过程中，该权系数也在变化。对于均匀采样的地震数据，笔者给出了近偏移距外推和波场的反假频重采样的计算结果，试算表明笔者给出的加权PRT方法可有效地应用于地震波场重建中，并具有算法稳健、计算精度高和效率高的特点。
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| 关 键 词： | 加权抛物Radon变换 波场重建 权系数 |
A WAVEFIELD RECONSTRUCTION APPROACH BASED ON WEIGHTED PARABOLIC RADON TRANSFORM |
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| SHI Ying,KE Xuan,WANG Wei-hong.A WAVEFIELD RECONSTRUCTION APPROACH BASED ON WEIGHTED PARABOLIC RADON TRANSFORM[J].Geophysical and Geochemical Exploration,2012(5):846-850. |
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| Authors: | SHI Ying KE Xuan WANG Wei-hong |
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| Institution: | 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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| Keywords: | weighted parabolic Radon transform wavefield reconstruction weight coefficient |
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