地震曲率技术在地震资料解释中的应用
|
摘要
通过地震曲率属性的分析,寻找适合研究区的地震曲率,研究其解释技术。系统总结了地震曲率技术的解释应用及应注意的问题。针对小断层在常规地震剖面上表现为同相轴的微小变化、扭曲、振幅突然变弱等特征,利用这些微小的变化在地震层曲率属性上表现为线性构造,进行小断层识别,异常的长度和方向分别代表着断层的延展长度和断层的走向。二维曲率属性有比较明确的物理意义,相对一阶导数属性(如微分、倾角、方位角等),它在构造特征识别上有明显的长处。它们对刻画地质体轮廓、分层结构、断裂系统等非常有效。实例表明,地震曲率属性对断层的轨迹、沉积体边界的刻画清晰、连续,利于解释,减少解释多解性。
Based on the theory of seismic curvature attributes,this paper analyzed features of seismic curvature attributes and found out effective seismic curvature attributes to interpret the seismic data.Suming up the application of the seismic curvature attributes and the notable problems during the process of application,2D curvature attributes explicit physical meanings and obvious advantages in identification of structure characteristics.The attributes are usually related to seismic horizon's geometric shapes(like dip,azimuth and curvature,etc.),which are effective to describe geologic configuration,hierarchy and fault system.Minor faults on general seismic section show the features such as even tiny variety,twist,weaking abruptly of the amplitude.These tiny varieties show small linear structure on curvature attribute of the seismic horizon,so minor faults can be interpreted according to linear structure abnormity.The length of abnormity and directions represent the continued length and directions of faults respectively.The applications show that it is effective and convenient to interpret faults using seismic curvature attributes.The track of the faults and the sizes,shapes and boundaries of sedimentary bodies become continuous and clear.And it is beneficial for fault interpretation.
Based on the theory of seismic curvature attributes,this paper analyzed features of seismic curvature attributes and found out effective seismic curvature attributes to interpret the seismic data.Suming up the application of the seismic curvature attributes and the notable problems during the process of application,2D curvature attributes explicit physical meanings and obvious advantages in identification of structure characteristics.The attributes are usually related to seismic horizon's geometric shapes(like dip,azimuth and curvature,etc.),which are effective to describe geologic configuration,hierarchy and fault system.Minor faults on general seismic section show the features such as even tiny variety,twist,weaking abruptly of the amplitude.These tiny varieties show small linear structure on curvature attribute of the seismic horizon,so minor faults can be interpreted according to linear structure abnormity.The length of abnormity and directions represent the continued length and directions of faults respectively.The applications show that it is effective and convenient to interpret faults using seismic curvature attributes.The track of the faults and the sizes,shapes and boundaries of sedimentary bodies become continuous and clear.And it is beneficial for fault interpretation.
引文
[1]Lisle R J.Detection of zones of abnormal strains in structures u-sing Gaussian curvature analysis[J].AAPG Bulletin,1994,78:1811?1819.
[2]Roberts Andy.Curvature attributes and their application to 3D in-terpreted horizons[J].First Break,2001,19(2):85-100.
[3]杜文凤,彭苏萍.利用地震层曲率进行煤层小断层预测[J].岩石力学与工程学报,2008,27(增1):2901-2906.
[4]Satinder Chopra,Kurt J Marfurt.Multi-spectral volumetric cur-vature adding value to 3D seismic data interpretation[J].SEGExpanded Abstracts,2008,27:1585-1589.
[5]赵贤正,张玮,邓志文,等.富油凹陷精细地震勘探技术[M].北京:石油工业出版社,2009.
[6]Satinder Chopra,Kurt Marfurt.曲率属性在3D地面地震资料中的应用[J].赵剑敏,吴龙丽摘译.油气地球物理,2007,5(4):50-59.
[7]Saleh Al-Dossary,Kurt J Marfurt.3D volumetric multi-spectralestimates of reflector curvature and rotation[J].Geophysics,2006,71(5):41-51.
[8]Stewart R,Podolski S A.Curvature analysis of gridded surfaces.In:Coward MP,Daltaban TS,Johnson H.Structural Geology inReservoir Characterization[M].London:Geological Society Spe-cial Publications,1998,127:133-147.
[9]Satinder Chopra,Kurt Marfurt.Seismic curvature attributes formapping faults/fractures,and other stratigraphic features[J].CSEG Recorder,2007,11:37-41.
[10]孙尚如.预测储层裂缝的两种曲率方法应用比较[J].地质科技情报,2003,22(4):71-74.
[11]石瑛,王赟,芦俊.煤田地震多属性分析技术的应用[J].煤炭学报,2008,33(12):1397-1402.
[12]柏冠军.三维地震资料微机管理及可视化解释系统研究与开发[D].西安:西北大学硕士学位论文,2006.
[13]王伟.地震几何属性识别断层技术研究及应用[D].青岛:中国石油大学(华东)硕士学位论文,2009.
[2]Roberts Andy.Curvature attributes and their application to 3D in-terpreted horizons[J].First Break,2001,19(2):85-100.
[3]杜文凤,彭苏萍.利用地震层曲率进行煤层小断层预测[J].岩石力学与工程学报,2008,27(增1):2901-2906.
[4]Satinder Chopra,Kurt J Marfurt.Multi-spectral volumetric cur-vature adding value to 3D seismic data interpretation[J].SEGExpanded Abstracts,2008,27:1585-1589.
[5]赵贤正,张玮,邓志文,等.富油凹陷精细地震勘探技术[M].北京:石油工业出版社,2009.
[6]Satinder Chopra,Kurt Marfurt.曲率属性在3D地面地震资料中的应用[J].赵剑敏,吴龙丽摘译.油气地球物理,2007,5(4):50-59.
[7]Saleh Al-Dossary,Kurt J Marfurt.3D volumetric multi-spectralestimates of reflector curvature and rotation[J].Geophysics,2006,71(5):41-51.
[8]Stewart R,Podolski S A.Curvature analysis of gridded surfaces.In:Coward MP,Daltaban TS,Johnson H.Structural Geology inReservoir Characterization[M].London:Geological Society Spe-cial Publications,1998,127:133-147.
[9]Satinder Chopra,Kurt Marfurt.Seismic curvature attributes formapping faults/fractures,and other stratigraphic features[J].CSEG Recorder,2007,11:37-41.
[10]孙尚如.预测储层裂缝的两种曲率方法应用比较[J].地质科技情报,2003,22(4):71-74.
[11]石瑛,王赟,芦俊.煤田地震多属性分析技术的应用[J].煤炭学报,2008,33(12):1397-1402.
[12]柏冠军.三维地震资料微机管理及可视化解释系统研究与开发[D].西安:西北大学硕士学位论文,2006.
[13]王伟.地震几何属性识别断层技术研究及应用[D].青岛:中国石油大学(华东)硕士学位论文,2009.
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