随机-均匀介质地震波振幅属性研究
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摘要
基于二维随机-均匀介质模型,讨论了复杂介质中由非均匀体产生的散射波的特性,同时讨论了不同尺度地质体条件下散射波对直达波和反射波的影响。建立了11个不同尺度的随机-均匀介质模型,并利用有限差分法进行了正演模拟。基于正演模拟结果,提取了直达波、散射波和反射波的均方根振幅、平均绝对振幅、振幅峰态和绝对振幅积分4种振幅属性,绘制了振幅属性与非均匀地质体尺度的关系曲线。研究认为,当非均匀地质体尺度与地震波长相近或更小时,3种地震波的4种振幅属性值随地质体尺度的增大而增大;当非均匀地质体尺度比地震波长大或大很多时,随着地质体尺度的增大,直达波和反射波的4种振幅属性值均呈减小趋势,散射波的4种振幅属性值呈增大趋势。
Based on 2-D random-uniform medium model,we discussed the characteristics of scattering wave produced by heterogeneous bodies in complex medium,as well as the impact of scattering wave on direct wave and reflected wave with different-scale geologic bodies.Eleven different-scale random-uniform medium models were built, and the finite-difference method was used to carry out forward modeling.Based on forward modeling results,some amplitude attributes of direct wave,scattered wave and reflected wave were extracted, including root-mean-square amplitude,mean absolute amplitude, amplitude kurtosis and absolute amplitude integration.The relationship curves between amplitude attributes and the scale of heterogeneous geologic bodies was mapped.The research results show that when the scale of heterogeneous geologic bodies is near to or smaller than the seismic wavelength,four attribute values of the three kinds of seismic waves increase with the scale of geologic bodies increasing;when the scale of heterogeneous geologic bodies is larger or much larger than the seismic wavelength,with the scale of geologic bodies increasing,four attribute values of direct wave and reflected wave decrease,but the four attribute values of scattering wave increases.
Based on 2-D random-uniform medium model,we discussed the characteristics of scattering wave produced by heterogeneous bodies in complex medium,as well as the impact of scattering wave on direct wave and reflected wave with different-scale geologic bodies.Eleven different-scale random-uniform medium models were built, and the finite-difference method was used to carry out forward modeling.Based on forward modeling results,some amplitude attributes of direct wave,scattered wave and reflected wave were extracted, including root-mean-square amplitude,mean absolute amplitude, amplitude kurtosis and absolute amplitude integration.The relationship curves between amplitude attributes and the scale of heterogeneous geologic bodies was mapped.The research results show that when the scale of heterogeneous geologic bodies is near to or smaller than the seismic wavelength,four attribute values of the three kinds of seismic waves increase with the scale of geologic bodies increasing;when the scale of heterogeneous geologic bodies is larger or much larger than the seismic wavelength,with the scale of geologic bodies increasing,four attribute values of direct wave and reflected wave decrease,but the four attribute values of scattering wave increases.
引文
1吴如山,安艺敬一.地震波的散射衰减[M].李裕澈,卢寿德,译.北京:地震出版社,1993.1-10
2尹军杰,刘学伟,李文慧.地震波散射理论及应用研究综述[J].地球物理学进展,2005,20(1):123-134
3李灿苹,刘学伟,王祥春,等.地震波的散射理论和散射特征及其应用[J].勘探地球物理进展,2005,28(2): 81-89
4勾丽敏,刘学伟,雷鹏,等.金属矿地震勘探技术方法研究综述-散射波地震勘探方法[J].勘探地球物理进展, 2007,30(2).85-90,103
5 Ikele L T,Yung S K,Daube F.2 - D random media with ellipsoidal autocorrelation functions[J].Geophysics, 1993,58(9):1 359-1 372
6奚先,姚姚.二维随机介质及波动方程正演模拟[J].石油地球物理勘探,2001,36(5):546-552
7奚先,姚姚.随机介质模型的模拟与混合型随机介质[J].地球科学—中国地质大学学报,2002,27(1):67- 71
8姚姚,奚先.随机介质模型正演模拟及其地震波场分析[J].石油物探,2002,41(1):31-36
9姚姚,奚先.区域多尺度随机介质模型及其波场分析[J].石油物探,2004,43(1):1-7
10奚先,姚姚.非平稳随机介质模型[J].石油地球物理勘探.2005,40(1):71-75
11奚先,姚姚,弹性随机介质模型的特征频率[J].地球物理学进展,2005,20(3):681-687
12曹辉.地震属性应用中几个关键问题的探讨[J].石油物探,2004,43(增刊):1-3
13庄东海.地震属性技术与四维地震方法研究及应用[D].北京:中国地质大学(北京),1999
14李灿苹,刘学伟,李敏峰,等.非均匀地质体散射波特征初探[J].石油物探.2006,45(2):134-140
15邹才能,张颖.油气勘探开发实用地震新技术[M].北京:石油工业出版社,2002.1-552
2尹军杰,刘学伟,李文慧.地震波散射理论及应用研究综述[J].地球物理学进展,2005,20(1):123-134
3李灿苹,刘学伟,王祥春,等.地震波的散射理论和散射特征及其应用[J].勘探地球物理进展,2005,28(2): 81-89
4勾丽敏,刘学伟,雷鹏,等.金属矿地震勘探技术方法研究综述-散射波地震勘探方法[J].勘探地球物理进展, 2007,30(2).85-90,103
5 Ikele L T,Yung S K,Daube F.2 - D random media with ellipsoidal autocorrelation functions[J].Geophysics, 1993,58(9):1 359-1 372
6奚先,姚姚.二维随机介质及波动方程正演模拟[J].石油地球物理勘探,2001,36(5):546-552
7奚先,姚姚.随机介质模型的模拟与混合型随机介质[J].地球科学—中国地质大学学报,2002,27(1):67- 71
8姚姚,奚先.随机介质模型正演模拟及其地震波场分析[J].石油物探,2002,41(1):31-36
9姚姚,奚先.区域多尺度随机介质模型及其波场分析[J].石油物探,2004,43(1):1-7
10奚先,姚姚.非平稳随机介质模型[J].石油地球物理勘探.2005,40(1):71-75
11奚先,姚姚,弹性随机介质模型的特征频率[J].地球物理学进展,2005,20(3):681-687
12曹辉.地震属性应用中几个关键问题的探讨[J].石油物探,2004,43(增刊):1-3
13庄东海.地震属性技术与四维地震方法研究及应用[D].北京:中国地质大学(北京),1999
14李灿苹,刘学伟,李敏峰,等.非均匀地质体散射波特征初探[J].石油物探.2006,45(2):134-140
15邹才能,张颖.油气勘探开发实用地震新技术[M].北京:石油工业出版社,2002.1-552
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