基于叠前波场模拟的火成岩地震反射特征分析
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摘要
利用褶积模型得到的地震记录由于没有考虑处理过程以及火成岩上覆地层等因素的影响,不能很好地模拟火成岩在实际地震剖面上的反射特征。因此,设计了一个火成岩地质模型,利用波动方程正演得到其叠前地震波场。分别利用叠后时间偏移、叠前时间偏移和叠前深度偏移对模拟的地震数据进行偏移成像,进而对火成岩地震反射特征进行观察和分析,由此得到对该火成岩模型地震相模式的基本认识。实验结果表明,与传统的褶积模型相比,该方法更真实地模拟了火成岩在实际地震剖面上的反射特征,形成的火成岩地震相模式对于实际火成岩机构的地震识别具有较好的指导意义。
Because the impact of processing procedure and the overlying formations of volcanic rocks hasn't been considered,the seismic records obtained by convolution model cannot well simulate the reflection characteristics of volcanic rock on actual seismic sections; therefore,we designed a geological model of volcanic rock,and achieved its pre-stack seismic wavefield by wave equation forward simulation.Then post-stack time migration,pre-stack time migration and pre-stack depth migration were carried out on simulated seismic data to discover and analyze the reflection characteristics of volcanic rock.Finally,the seismic facies pattern of volcanic model was basically obtained.Actual application result indicates that the method provides more real simulation on the reflection characteristics of volcanic rock on seismic section,and the obtained seismic facies pattern of volcanic rock has better guidance meaning on seismic identification of actual volcanic apparatus.
Because the impact of processing procedure and the overlying formations of volcanic rocks hasn't been considered,the seismic records obtained by convolution model cannot well simulate the reflection characteristics of volcanic rock on actual seismic sections; therefore,we designed a geological model of volcanic rock,and achieved its pre-stack seismic wavefield by wave equation forward simulation.Then post-stack time migration,pre-stack time migration and pre-stack depth migration were carried out on simulated seismic data to discover and analyze the reflection characteristics of volcanic rock.Finally,the seismic facies pattern of volcanic model was basically obtained.Actual application result indicates that the method provides more real simulation on the reflection characteristics of volcanic rock on seismic section,and the obtained seismic facies pattern of volcanic rock has better guidance meaning on seismic identification of actual volcanic apparatus.
引文
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[11]Li G F,Xiong J L,Zhou H,et al.Seismic reflection characteristics of fluvial sand and shale interbedded layers[J].Applied Geophysics,2008,5(3 ):219-229
[12]韩站一,尚新民,孙成禹,等.火成岩下伏地层地震反射波场特征分析[J].石油物探,2009,48(3):226-231
[13]裴正林,牟永光.火成岩区地震波传播规律研究[J].石油物探,2004,43(5):433-437
[14]Zhou H,Wang S X,Li G F,et al.Analysis of complicated structure seismic wave fields[J].Applied Geophysics,2010,7(2):185-192
[2]邹长春,严成信,李学文.神经网络在枣北地区火成岩储层测井解释中的应用[J].石油地球物理勘探, 1997,32(增刊2):27-33
[3]李明,邹才能,刘晓,等.松辽盆地北部深层火成岩气藏识别与预测技术[J].石油地球物理勘探,2002,37 (5):484-488
[4]刘小平,杨晓兰,曾忠玉,等.多参数联合反演在火成岩储集层预测中的应用[J].石油地球物理勘探, 2007,42(1):45-49
[5]石胜群,杨德洲,张秀萍,等.苏北海中地区火成岩储层预测及其应用[J].沉积与特提斯地质,2005,24 (3):108-112
[6]刘淑华,协占安,刘建武,等.叠前地震多属性反演在南堡油田火成岩研究中的应用[J].石油物探,2008, 47(1):83-88
[7]陈海云,林春明,张云银.济阳坳陷新生代火成岩的识别[J].石油地球物理勘探,2005,40(6):663-670
[8]崔世凌,杨泽蓉.火成岩储层的预测研究[J].石油物探,2007,46(1):36-41
[9]陈广波,潘文庆,郑多明,等.碳酸盐岩潜山中火成岩体的地震识别与预测[J].石油地球物理勘探,2007, 42(1):88-93
[10]李国发,廖前进,王尚旭,等.合成地震记录层位标定若干问题的探讨[J].石油物探,2008,47(2):145-149
[11]Li G F,Xiong J L,Zhou H,et al.Seismic reflection characteristics of fluvial sand and shale interbedded layers[J].Applied Geophysics,2008,5(3 ):219-229
[12]韩站一,尚新民,孙成禹,等.火成岩下伏地层地震反射波场特征分析[J].石油物探,2009,48(3):226-231
[13]裴正林,牟永光.火成岩区地震波传播规律研究[J].石油物探,2004,43(5):433-437
[14]Zhou H,Wang S X,Li G F,et al.Analysis of complicated structure seismic wave fields[J].Applied Geophysics,2010,7(2):185-192
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