中国石油大学学报（自然科学版）2017，Vol.41Issue(4)：71-77,7.DOI:10.3969/j.issn.1673-5005.2017.04.009
基于匹配追踪的叠前道集吸收补偿和频散校正
Pre-stack seismic gather absorption compensation and dispersion correction based on matching pursuit
摘要
Abstract
Pre-stack seismic gathers are firstly decomposed into a variety of matching wavelets by utilizing the matching pur-suit algorithm. The amplitude attenuation curve, which changes with the products of wavelets central times and central fre-quencies, can be established by using zero-offset matching wavelets. Based on this, the gain coefficients that belong to differ-ent matching wavelets attenuation amplitude can be obtained. Then, according to the absorption differences between zero-off-set event and non-zero offset event, the zero-offset amplitude gain coefficients and the gather angels are combined to calculate non-zero offset events amplitude gain coefficients. Lastly, different matching wavelets attenuation amplitudes can be compen-sated by utilizing amplitude gain coefficients accordingly to reconstruct the seismic signal. To correct the influence of disper-sion, Q values are estimated by matching pursuit. The comparison between the synthetic seismic signal and the real data shows that this new algorithm is efficient in both compensating the deep part seismic attention energy, and eliminating the in-fluence of absorption in offset direction.关键词
地震勘探/叠前道集/吸收衰减/匹配追踪/振幅增益系数/频散校正Key words
seismic prospecting/pre-stack gather/absorption attenuation/matching pursuit/amplitude gain coefficient/dis-persion correction分类
天文与地球科学引用本文复制引用
张繁昌,张汛汛,翁斌,谢秀川,郑炀..基于匹配追踪的叠前道集吸收补偿和频散校正[J].中国石油大学学报（自然科学版）,2017,41(4):71-77,7.基金项目
国家科技重大专项(2016ZX05006004) （2016ZX05006004）
中海油重点科研项目(YXKY-2016-ZY-09) （YXKY-2016-ZY-09）
中国石油大学(华东)研究生创新工程项目(YCX2015006) （华东）
