海上拖缆三维地震数据规则化技术研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
电缆的羽状漂移导致海上三维拖缆地震资料采集出现偏移距、方位角及覆盖次数的不规则现象,常规面元均化技术难以实现CMP道集内数据的规则性。在分析海上地震数据不规则性特点的基础上,将反漏频傅里叶变换(ALFT)数据规则化技术应用于LD地区WZ油田的CMP道集内数据的规则化处理,基于规则化海上地震数据的叠前偏移成像效果,评价该方法的有效性。结果表明,地震数据规则化技术可以有效地提高数据的信噪比,改善同相轴的连续性,明显提高成像质量。
Irregularities occur in azimuth and fold due to streamer feathering while conducting marine seismic acquisition.To remedy this,the traditional approach to do bin equalization but it is difficult to realize the regular of data in CMP gathers.The technology of antileakage Fourier transform(ALFT)for data regularization is applied to regularize the data in CMP gathers at LD area in WZ oilfield based on the analysis of the characteristics of irregularity for marine seismic data.The availability of the ALFT is evaluated based on the effect of pre-stack migration for marine seismic data regularized.The results in this paper show that the regularization significantly raises the ratio of S/N,improves the reflection events continuity and enhances the overall quality of seismic data.
引文
[1]Verschuur D J,Berkhout A J.Adaptive surface-related multiple elimination[J].Geophysics,1992,57(9):1166-1177.
    [2]Weglein A B.Multiple attenuation:An overview of recent advances and the road ahead[J].The Leading Edge,1999,18(1):40-44.
    [3]Soubaras R.Spatial interpolation of aliased seismic data,67th Ann.Internat.Mtg.,Soc.Expl.Geophys.,Expanded Abstracts.1997:1167-1170.
    [4]Spitz S.Seismic trace interpolation in the FX domain[J].Geophysics,1991,56(6):785-794.
    [5]Gülünay N.Seismic trace interpolation in the Fourier transform domain[J].Geophysics,2003,68(1):355-369.
    [6]Biondi B,Formel S,Chemingui N.Azimuth moveout for 3-D prestack imaging[J].Geophysics,1998,63(2):574-588.
    [7]Formel S.Theory of differential offset continuation[J].Geophysics,2003,68(2):718-732.
    [8]唐亚勋.基于偏移与反偏移的同相叠加方法研究[D].上海:同济大学,2005.
    [9]Liu B,Sacchi M D.Minimum weighted norm interpolation of seismic records[J].Geophysics,2004,69(6):1560-1568.
    [10]Zwartjes P M,Sacchi M D.Fourier reconstruction of nonuniformly sampled,aliased seismic data[J].Geophysics,2007,72(1):21-32.
    [11]Xu S,Zhang Y,Pham D L,et al.Fourier transform for seismic data regularization[J].Geophysics,2005,70(4):87-94.
    [12]Wang X,Wang H Z.Minimizing ellipsoidal norm seismic data interpolation with radon spectrum constraints[C]∥73-rd Annual Meeting,EAGE,Expanded Abstracts,2011,A046.
    [13]Herrmann F J.Randomized sampling and sparsity:Getting more information from fewer samples[J].Geophysics,2010,75(6):173-187.
    [14]Abma R,Kabir N.Comparisons of interpolation methods[J].The Leading Edge,2005,10:984-989.
    [15]贾友珠.三维地震资料连片处理中的面元均化技术:以桩海地区为例[J].油气地质与采收率,2002,9(2):50-52.
    [16]Gao Jian-Jun.Irregular seismic data reconstruction based on exponential threshold model of POCS method[J].Applied Geophysics,2010,7(3):229-238.
    [17]Zwartjes P,Gisolf A.Fourier reconstruction of marine-streamer data in four spatial coordinates[J].Geophysics,2006,71(6):171-186.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心