基于模型的薄互层地震属性分析及其应用
|
摘要
反射振幅和瞬时频率是砂体厚度预测中常用的2个地震属性,但建立这2个基本属性与砂体厚度之间的关系所依据的实验模型是简单的单砂体楔形模型,不一定适用于薄互层情况。为此设计了2个薄互层地质模型,利用褶积算法产生合成地震记录,进而分析薄互层条件下反射振幅和瞬时频率与砂体累计厚度之间的关系。实验结果表明:在薄互层的累计厚度小于1/4波长的情况下,薄互层反射振幅和瞬时频率与单砂体模型具有类似的特征,砂体累计厚度越大,地震反射振幅越大,瞬时频率越小。以上结论在华北油田实际地震属性分析中得到了验证和应用。
Reflection amplitude and simultaneous frequency are two basic seismic attributes widely used to predict sand body thickness.However, the experimental model,from which the relationship between the two attributes and sand thickness were derived,is a simple wedge model of single sand body,which may not be applicable to thin interbedded layers.Therefore,two thin interbedded models were designed and synthetic seismic records were generated by using convolution method,then,the relationship between reflection amplitude and cumulative sand thickness,as well as the relationship between simultaneous frequency and cumulative sand thickness, was analyzed.The experimental result indicates that when the cumulative thickness of thin interbedded layers is less than a quarter wavelength,and the characteristics of reflection amplitude and simultaneous frequency in thin interbedded layers are similar to those in single sand body model.Larger cumulative thickness leads to stronger seismic reflection amplitude and smaller simultaneous frequency. The above conclusions were verified in seismic attribute analysis in Huabei oilfield.
Reflection amplitude and simultaneous frequency are two basic seismic attributes widely used to predict sand body thickness.However, the experimental model,from which the relationship between the two attributes and sand thickness were derived,is a simple wedge model of single sand body,which may not be applicable to thin interbedded layers.Therefore,two thin interbedded models were designed and synthetic seismic records were generated by using convolution method,then,the relationship between reflection amplitude and cumulative sand thickness,as well as the relationship between simultaneous frequency and cumulative sand thickness, was analyzed.The experimental result indicates that when the cumulative thickness of thin interbedded layers is less than a quarter wavelength,and the characteristics of reflection amplitude and simultaneous frequency in thin interbedded layers are similar to those in single sand body model.Larger cumulative thickness leads to stronger seismic reflection amplitude and smaller simultaneous frequency. The above conclusions were verified in seismic attribute analysis in Huabei oilfield.
引文
[1]Li G F,Zhou H,Xiong J L.Potential risks of spectrum whitening deconvolution梒ompared with well-driven deconvolution[J].Petroleum Science,2009,6(2): 146-152
[2]Velis D R.Stochastic sparse-spike deconvolution [J].Geophysics,2008,73(1):R1-R9
[3]Castagna J P,Puryear C I.Layer-thickness determination and stratigraphic interpretation using spectral inversion:theory and application[J].Geophysics, 2008,73(2):R37-R48
[4]姚姚,刘兴利,吴俊峰,等.基于随机介质的提高地震记录分辨率的扩频方法[J].石油物探,2009,48(3): 210-220
[5]Baan M V D,Pham D T.Robust wavelet estimation and blind deconvolution of noisy surface seismics [J].Geophysics,2008,73(5):V37-V46
[6]吴常玉,杨瑞娟,鲍峥,等.基于负熵的盲源反褶积方法及其应用[J].石油物探,2009,48(3):232-238
[7]王维红,林春华,王建民,等.叠前弹性参数反演方法及其应用[J].石油物探,2009,48(5):483-487
[8]Morozov I B,Ma J F.Accurate poststack acousticimpedance inversion by well-log calibration[J].Geophysics, 2009,74(5):R59-R67
[9]Li G F,Xiong J L,Zhou H.Seismic reflection characteristics of fluvial sand and shale interbedded layere [J].Applied Geophysics,2008,5(3):219-229
[10]王濮,金振奎,李国发,等.薄层生物碎屑灰岩的地震属性检测[J].石油物探,2007,46(4):390-393
[11]魏艳,尹成,丁峰,等.地震多属性综合分析的应用研究[J].石油物探,2007,46(1):42-47
[12]丁峰,年永吉,王治国,等.地震多属性RGBA颜色融合技术的应用研究[J].石油物探,2010,49(3): 248-252
[13]Kallweit R S,Wood L C.The limits of resolution of zero-phase wavelets[J].Geophysics,1982,47(7): 1035-1046
[14]Partyka G,Gridley J,Lopez J.Interpretational application of spectral decomposition in reservoir characterization [J].The Leading Edge,1999,18(3): 353-357
[15]杨金山,丁艳红,李志勇,等.频谱成像技术在泌阳凹陷深凹区储层预测中的应用[J].石油物探,2010,49 (1):54-57
[2]Velis D R.Stochastic sparse-spike deconvolution [J].Geophysics,2008,73(1):R1-R9
[3]Castagna J P,Puryear C I.Layer-thickness determination and stratigraphic interpretation using spectral inversion:theory and application[J].Geophysics, 2008,73(2):R37-R48
[4]姚姚,刘兴利,吴俊峰,等.基于随机介质的提高地震记录分辨率的扩频方法[J].石油物探,2009,48(3): 210-220
[5]Baan M V D,Pham D T.Robust wavelet estimation and blind deconvolution of noisy surface seismics [J].Geophysics,2008,73(5):V37-V46
[6]吴常玉,杨瑞娟,鲍峥,等.基于负熵的盲源反褶积方法及其应用[J].石油物探,2009,48(3):232-238
[7]王维红,林春华,王建民,等.叠前弹性参数反演方法及其应用[J].石油物探,2009,48(5):483-487
[8]Morozov I B,Ma J F.Accurate poststack acousticimpedance inversion by well-log calibration[J].Geophysics, 2009,74(5):R59-R67
[9]Li G F,Xiong J L,Zhou H.Seismic reflection characteristics of fluvial sand and shale interbedded layere [J].Applied Geophysics,2008,5(3):219-229
[10]王濮,金振奎,李国发,等.薄层生物碎屑灰岩的地震属性检测[J].石油物探,2007,46(4):390-393
[11]魏艳,尹成,丁峰,等.地震多属性综合分析的应用研究[J].石油物探,2007,46(1):42-47
[12]丁峰,年永吉,王治国,等.地震多属性RGBA颜色融合技术的应用研究[J].石油物探,2010,49(3): 248-252
[13]Kallweit R S,Wood L C.The limits of resolution of zero-phase wavelets[J].Geophysics,1982,47(7): 1035-1046
[14]Partyka G,Gridley J,Lopez J.Interpretational application of spectral decomposition in reservoir characterization [J].The Leading Edge,1999,18(3): 353-357
[15]杨金山,丁艳红,李志勇,等.频谱成像技术在泌阳凹陷深凹区储层预测中的应用[J].石油物探,2010,49 (1):54-57
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