部分共偏移距共反射面元叠加技术研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
共偏移距共反射面元(CO CRS)叠加由传统的零偏移距共反射面元(ZO CRS)叠加发展而来,其算子的有效范围更大,可以充分利用大炮检距信息对复杂地下构造进行成像。该次研究采用的参数分步搜素策略大大缩短了计算时间,有效解决了实现过程中计算效率较低的难题。利用部分CO CRS叠加对稀疏的低信噪比地震资料进行处理,不仅可以对数据进行规则化,补充缺失地震道信息,而且整体提高了资料的信噪比,这对于后面的常规处理比如速度分析、叠前偏移等,都是非常有利的,在模型试算中见到了明显效果。
Common-offset and common-reflection-surface(CO CRS) stacking was expanded from conventional Zero-offset common-reflection-surface(ZO CRS) stacking.The valid range of the stacking operator was wider and the better imaging of complex subsurface structures could be obtained with far-offset information.The parameter splitting algorithm used in this paper obviously reduced the calculation time of CO CRS stacking,which effectively resolved the difficulty of low computational efficiency in actual application.The partial CO CRS stacking method is used to enhance the quality of sparse low fold prestack seismic data,which is regularized by filling the gaps in cases of missing traces for improving signal-to-noise ratio.The improved prestack data can be used in many conventional processing steps,such as velocity analysis or prestack migration instead of the original data.Satisfactory results are obtained in the model test.
引文
[1]李振春,张军华.地震数据处理方法[M].东营:中国石油大学出版社,2004.1~15.
    [2]Stolt R H.Seismic data mapping and reconstruction[J].Geophysics,2002,67(3):890~908.
    [3]Fomel S.Seismic reflection data interpolation with differential offset and shot continuation[J].Geophysics,2003,68(2):733~744.
    [4]Joger R,Mann J,Hcht G,et al.Common-reflection-surface stack:imaging and attributes[J].Geophysics,2001,66(1):97~109.
    [5]Mann J.Extensions and applications of the common-reflection-surface stack method[D].Karlsruhe:Geophysical Institute,Universityof Karlsruhe,2002.
    [6]王华忠,杨锴,马在田.共反射面元叠加的应用理论——从共反射点到共反射面元[J].地球物理学报,2004,47(1):137~142.
    [7]谭未一,杨长春,李瑞忠,等.共反射面元叠加的实现途径及流程[J].地球物理学进展,2004,19(2):325~330.
    [8]Bergler S.The common-reflection-surface stack for common offset theory and application[D].Karlsruhe:University of Karlsruhe,2001.
    [9]Zhang Y,Bergler S,Hubral P.Common-reflection-surface(CRS)stack for common offset[J].Geophysical Prospecting,2001,49(6):709~718.
    [10]李栋,李振春,孙小东,等.共偏移距共反射面元叠加方法[J].中国石油大学学报,2011,35(3):42~46.
    [11]李栋,李振春,孔雪,等.利用共偏移距共反射面元叠加提高叠前地震资料质量[J].中国石油大学学报,2012,36(2):76~80.
    [12]Boelsen T.The common-reflection-surface stack for arbitrary acquisition geometrics and multi-component data——Theory and applica-tion[D].Karlsruhe:University of Karlsruhe,2005.
    [13]Baykulov M,Gajewski D.Prestack seismic data enhancement with partial common-reflection-surface(CRS)stack[J].Geophysics,2009,74(3):49~58.

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