基于保边去噪的高精度相干体分析应用研究
|
摘要
相干体技术在揭示地层的横向变化及断层和复杂构造等方面与常规的地震振幅切片相比具有很大的优越性。但当原始振幅数据体信噪比较低时,相干体受噪声干扰较大,分辨率较差。为克服常规相干体计算受噪声影响较大的缺点,通过引入保边去噪技术,提出一种基于三维保边去噪(3DEPS)的相干体分析方法,在进行相干分析之前,先对原始振幅数据体做三维保边去噪,实际资料的计算结果显示,利用该方法得到的相干切片对断层和复杂构造的分辨能力得到显著提高。
Seismic coherence had more advantages from the aspect of revealing,lateral changes of strata, fault and complex structure compared to the conventional seismic amplitude slice .But when the original seismic amplitude data volume had lower signal to noise ratio, the coherence cube was seriously influenced by the noise,its ability of resolution was poor.In order to overcome the shortcoming with large influence of noise on the conventional calculation of coherence cube and by introducing 3-D edge-preserving smoothing technique, this paper presentsed a 3-D edge-preserving smoothing -based coherence analysis method,it first carried out edge-preserving smoothing prosessing of original seismic amplitude data volume before the coherence analysis.The computing results of practical data show that the ability to distinguish the fault and complex structure of the coherence slice gained by the method significantly increase.
Seismic coherence had more advantages from the aspect of revealing,lateral changes of strata, fault and complex structure compared to the conventional seismic amplitude slice .But when the original seismic amplitude data volume had lower signal to noise ratio, the coherence cube was seriously influenced by the noise,its ability of resolution was poor.In order to overcome the shortcoming with large influence of noise on the conventional calculation of coherence cube and by introducing 3-D edge-preserving smoothing technique, this paper presentsed a 3-D edge-preserving smoothing -based coherence analysis method,it first carried out edge-preserving smoothing prosessing of original seismic amplitude data volume before the coherence analysis.The computing results of practical data show that the ability to distinguish the fault and complex structure of the coherence slice gained by the method significantly increase.
引文
[1]苑书金.地震相干体技术的研究综述[J].勘探地球物理进展,2007,30(1):7～15.
[2]蔡刚,孙东.相干体技术及其在油气勘探中的应用[J].天然气地球科学,2006,17(4):510～513.
[3]杨春峰,张宏.相干数据体处理技巧及在精细构造解释中的应用[J].石油物探,2004,43(Suppl):107～109.
[4]Gersztenkorn A,Marfurt K J.Eigenstructure-based coherence computations as an aid to3-D structural and stratigraphic mapping[J].Geophysics,1999,64:104～111.
[5]张军华,王月英.C3相干体在断层和裂缝识别中的应用[J].地震学报,2004,26(5):560～564.
[6]王西文,杨孔庆.基于小波变换的地震相干体算法研究[J].地球物理学报,2002,45(6):848～852.
[7]熊晓军,尹成.一种新的基于高阶统计量的相干体算法[J].工程地球物理学报,2004,1(3):278～281.
[8]Kurt J Marfurt,Ronald MScheet,John A Sharp,et al.Suppress of the acquisition footprint for seismic sequence attribute mapping[J].Geophysics,1998,63(3):1024～1035.
[9]Kurt J Marfurt,R.Lynn kirlin,Steven L.Farmer,et al.3-D seismic attributes using a semblance2based coherency algorithm[J].Geophysics,1998,63(4):1150～1165.
[10]Yi Luo,Maher marhoon,et al.Edge-preserving smoothing and applications[J].The leading Edge,2002,21(2):136～158.
[11]Nasher M A,Yi Luo.3Dedge-preserving smoothing and applications[J].Geophysics,2006,71(4):5～11.
[12]熊晓军,贺振华.一种基于GHT的裂缝检测新方法[J].石油地球物理勘探,2009,44(4):442～444.
[2]蔡刚,孙东.相干体技术及其在油气勘探中的应用[J].天然气地球科学,2006,17(4):510～513.
[3]杨春峰,张宏.相干数据体处理技巧及在精细构造解释中的应用[J].石油物探,2004,43(Suppl):107～109.
[4]Gersztenkorn A,Marfurt K J.Eigenstructure-based coherence computations as an aid to3-D structural and stratigraphic mapping[J].Geophysics,1999,64:104～111.
[5]张军华,王月英.C3相干体在断层和裂缝识别中的应用[J].地震学报,2004,26(5):560～564.
[6]王西文,杨孔庆.基于小波变换的地震相干体算法研究[J].地球物理学报,2002,45(6):848～852.
[7]熊晓军,尹成.一种新的基于高阶统计量的相干体算法[J].工程地球物理学报,2004,1(3):278～281.
[8]Kurt J Marfurt,Ronald MScheet,John A Sharp,et al.Suppress of the acquisition footprint for seismic sequence attribute mapping[J].Geophysics,1998,63(3):1024～1035.
[9]Kurt J Marfurt,R.Lynn kirlin,Steven L.Farmer,et al.3-D seismic attributes using a semblance2based coherency algorithm[J].Geophysics,1998,63(4):1150～1165.
[10]Yi Luo,Maher marhoon,et al.Edge-preserving smoothing and applications[J].The leading Edge,2002,21(2):136～158.
[11]Nasher M A,Yi Luo.3Dedge-preserving smoothing and applications[J].Geophysics,2006,71(4):5～11.
[12]熊晓军,贺振华.一种基于GHT的裂缝检测新方法[J].石油地球物理勘探,2009,44(4):442～444.
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