中国东南屯溪-温州宽角地震资料去广角效应成像
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摘要
由于长排列广角地震采集中必定存在超临界角的广角反射信息,广角反射信息相对临界角内反射信息存在随偏移距变化的时移现象.本文研究了去广角效应下的走时反演成像,并将其应用到东南屯溪—温州的宽角地震资料.通过拾取中国东南屯溪—温州剖面宽角实际地震资料中P波垂直分量拾取到的反射P波走时,继而使用遗传反演方法进行处理,得到了该区丰乐、新安江、松阳、青田以及洞头五炮去广角效应与未考虑广角效应情况下的一维速度深度曲线,并对比了去广角效应前后的地壳结构界面形态.结果表明,广角效应去除前后影响主要体现在壳内层速度差异,地壳浅层界面深度的广角效应明显强于深层界面.
The supercritical angle wide-angle reflection information must exist in the long arrangement of wide-angle seismic acquisition,wide angle reflection information exists variation with offset time shift phenomenon relative to the critical angle internal reflection information.We studied seismic travel time inversion imaging under the effect of wide angle,and its application to the southeast of Tunxi-Wenzhou wide angle seismic data in this paper.By picking up the travel time of p wave vertical component of the section from Tunxi to Wenzhou in Chinese southeast region,and processed the data by genetic inversion method,we get one-dimensional velocity depth curve of five source points including Feng-le,Xin-an river,Song-yang,Qing-tian and Dongtou under the condition of taking into account and no the wide angle effect,and compared to crustal structure and interface formation under two conditions.The results show that wide angle effect is mainly reflected speed and interface depth in the crustal inner before and after removing the impact,the shallow crust interface depth wide angle effect was stronger than the deep interface.
The supercritical angle wide-angle reflection information must exist in the long arrangement of wide-angle seismic acquisition,wide angle reflection information exists variation with offset time shift phenomenon relative to the critical angle internal reflection information.We studied seismic travel time inversion imaging under the effect of wide angle,and its application to the southeast of Tunxi-Wenzhou wide angle seismic data in this paper.By picking up the travel time of p wave vertical component of the section from Tunxi to Wenzhou in Chinese southeast region,and processed the data by genetic inversion method,we get one-dimensional velocity depth curve of five source points including Feng-le,Xin-an river,Song-yang,Qing-tian and Dongtou under the condition of taking into account and no the wide angle effect,and compared to crustal structure and interface formation under two conditions.The results show that wide angle effect is mainly reflected speed and interface depth in the crustal inner before and after removing the impact,the shallow crust interface depth wide angle effect was stronger than the deep interface.
引文
[1]滕吉文.20世纪地球物理学的重要成就和21世纪的发展前沿[J].地学前缘,2003,10(1):117-140.Teng J W.Great achievements in geophysics in the 20ththcentury and developing frontiers for the 21st st century[J].Earth Science Frontiers(in Chinese),2003,Vol.,10(1):117-140.
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[3]Zhang,Z J,JoseBadal J,Li,Y K,et al.Crust-upper mantleseismic velocity structure across Southeastern China[J].Tectonophysics,2005,395(1-2):137-157.
[4]Zhang,Z J,Wang,G J,Teng,J W,et al.CDP mapping toobtain the fine structure of the crust and upper mantle fromseismic sounding data:an example infor the southeasternChina[J].Phys.Earth Planet.Inter.,2000,122(1-2):133-146.
[5]Xiong,S,Lai,M,Liu,H,et al.Lithosphere structure andvelocity distribution fromin Tunxi to Wenzhou[A].In://Li,J idianD.(Eed.),Lithosphere Structure and GeologicalEvolution of Southeastern China[C].Beijing:MeteorologicalPress,1993.pp.:267-277.
[6]江为为,郝天珧,胥颐,等.中国中南地区综合地质地球物理研究[J].地球物理学报,2007,vol.5(1):171-183.Jiang W W,Hao T Y,Xu Y,et al.Comprehensive geologicaland geophysical study in middle southern region of China[J].Chinese Journalof.Geophys.(in Chinese)ics,2007,vol.5(1):171-183.
[7]王有学,韩果花,姜枚,等.阿尔泰—-阿尔金地学断面地壳结构[J].地球物理学报,2004,vol.47(2):240-249.Wang Y X,Han G H,Jiang M,et al.Crustal structure alongthe geosciences transect from aAltay to aAltun tagh[J].Chinese Journalof.Geophysics.(in Chinese),2004,vol.47(2):240-249.
[8]曾融生,孙为国,毛桐恩,等.中国大陆莫霍界面深度图.地震学报,1995,vol.17(3):322-327.Zeng R S,Sun W G,Mao T E,et al.Depth map of Mohointerface in Chinese continent[J].Acta Sseismologica sSinica(in Chinese),1995,vol.17(3):322-327.
[9]廖其林,王振明,王屏路,等.福州-泉州-汕头地区地壳结构的爆炸地震研究.地球物理学报,1988,vol.31(03):270-280.Liao Q L,Wang Z M,Wang B L,et al.Explosion seismicstudy of the crustal structure in Ffuzhou-Qquanzhou-sShantouregion[J].Chinese Journalof.Geophysics.(in Chinese),1988,vol.31(03):270-280.
[10]尹周勋,赖明惠.华南连县-博罗-港口地带地壳结构及速度分布的爆炸地震探测结果[J].地球物理学报,1999,vol.42(3):384-392.Yin Z X,Lai M H.Crustal structure and velocity distributionfrom deep seismic sounding along the profile of lLianxian-Bboluo-Ggangkou in sSouth cChina[J].Chinese Journalof.Geophysics.(in Chinese),1999,vol.42(3):384-392.
[11]王祖伟,周永章,赵凤清,等.华南地区深部地质研究进展[J].地球科学进展,1997,vol.12(3):259-264.Wang Z W,Zhou Y Z,Zhao F Q,et al.The advance indepthgeology research,sSouth Cchina[J].Adveance inEearth sSciences(in Chinese),1997,vol.12(3):259-264.
[12]吴功建.中国地学断面地球物理研究的进展和展望[J].地球物理学报,1997,vol.40(S1):111-120.Wu G J.Advances and prospects of geophysical research forchina geoscience transects[J].Chinese Journalof.Geophys.(in Chinese)ics,1997,vol.40(S1):111-120.
[13]孔祥儒,熊绍伯,周文星.浙江省深部地球物理研究新进展——屯溪-温州、诸暨-临海地学断面及区域重力研究成果[J].浙江地质,1995,vol.11(1):50-62.Kong X R,Xiong S B,Zhou W X.New progress on deepgeophysical research in zZhejing:geological sections oftTunxi-wWenzhou and zZhuji-lLinhai and the achivements oftheir regioralgravity[J].Geology of Zhejiang(in Chinese),1995,vol.11(1):50-62.
[14]谢窦克,商玉强.东南大陆岩石圈板块地体构造[J].中国地质科学院南京地质矿产研究所所刊,1989,vol.10(4):1-11.Xie D K,Shang Y Q.Lithosphere plate-terrane tectonics ofthe Southeast China continent[J].Bull.Nanjing Inst.Geol.M.R.,Chinese Acad.Geol.Sci.(in Chinese),1989,vol.10(4):1-11.
[15]李智宏,胡中平,王辉明,等.含高速层地震物理模型的广角地震波场研究[J].勘探地球物理进展,2005,28(5):345-348.Li Z H,Hu Z P,Wang H M,et al.Investigation of WARRPseismic wavefield on physical model with a high velocity layer[J].Progress in Exploration Geophysics(in Chinese),2005,28(5):345-348.
[16]孙建国.广角地震在碳酸盐岩地区勘探中的应用[A].//反射地震学论文集[C].上海:同济大学出版社,2000:127-140.Sun J G.The application on wide-angle seismic in the barecarbonate rock area[A].//eEssay collection on reflectionseismography[C].Shanghai:Tongji Uuniversity Ppress(inChinese),2000:127-140.
[17]Xu T,Zhang Z.J,Gao E.G,XuG.MandSunL,et al.Segmentally iterative ray tracing in complex 2D and 3Dheterogeneous block models[J].Bull.Seismol.Soc.Am.,2010,100(2):841-850.
[18]Xu T,Xu G.M,Gao E.G,LiY.C,Jiang X.Y,LuoK,etal.Y.,Block modeling and segmentally iterative ray tracingin complex 3D media[J].Geophysics,2006,71(3):T41-T51.
[19]徐涛,徐果明,高尔根,等.朱良保、蒋先艺,三维复杂介质的块状建模和试射射线追踪[J].地球物理学报,2004,47(6):1118-1126.Xu T,Xu G M,Gao E G,et al.Block modeling andshooting ray tracing in complex 32D media[J].Chinese J.Geophys.(in Chinese),2004,47(6):1118-1126.
[20]王志,贺振华,黄德济,等.广角反射波场特征研究及正演模拟分析[J].地球物理学进展,2003,18(1):116-121.Wang Z,He Z H,Huang D J,et al.The wave-field featuresresearching of wide-angle reflection and the analyzing offorward modeling[J].Progress in Geophysics(in Chinese),2003,vol.,18(1):116-121.
[21]张中杰,白志明,王椿镛,等.冈瓦纳型和扬子型地块地壳结构:以滇西孟连-马龙宽角反射剖面为例[J].中国科学D辑,地球科学,2005,345(5):387-392.Zhang Z J,Bai Z M,Wang C Y,et al.The crustal structureof Gondawana-and Yangtze blocks:An example by wide-angle seismic reflectionprofileing betweenfrom Menglianandto Malong in western Yunnan[J].Science in China(SerialD),2005,48(11):1828-1836.
[22]张中杰,秦义龙,陈赘,等.由宽角反射地震资料重建壳幔反射结构的相似性剖面[J].地球物理学报,2004,47(3):469-474.Zhang Z J,Qin Y L,Chen Y,et al.Reconstruction of thesemblance section for the crust and mantle reflection structureby wide-angle reflection seismic data[J].Chinese J.Geophys.(iIn Chinese),2004,47(3):469-474.
[23]张中杰,何樵登,滕吉文.二维横向各向同性介质中弹性波场差分法模拟稳定性研究[J].长春地质学院学报,1993,(2):205-211.Zhang Z J,He Q D,Teng J W.Stability study for elasticwavefield modelling with finite difference method in 2-dD tim[J].Journal of Changchun uUniversity of Eearth Sscience(inChinese),1993,(2):205-211.
[24]张中杰,何樵登.含裂隙介质中地震波运动学问题的正演模拟[J].石油地球物理勘探,1989,24(3):290-300.Zhang Z J,He Q D.Forward modeling of kinematic problemsof seismic wave in fractured medium[J].Oil GeophysicalProspecting(in Chinese),1989,24(3):290-300.
[25]张中杰,何樵登,徐中信.二维横向各向同性介质2DTIM中人为边界反射的吸收-——差分法弹性波场模拟[J].地球物理学报,1993,36(4):519-527.Zhang Z J,He Q D,Xu Z X.The absorbtion of artificalboundary reflection in 2-D transversely isotropic media withfdm-elastic wavefields modellingmodelling[J].ChineseJournalof.Geophys.(in Chinese)ics,1993,36(4):519-527.
[26]Zhang X Y,Zhang Z J,Xu T,BaiZM,HarrisJMet al.Phaseshift approximation for the post-critical seismic wave[J].Journal of gGeophysics and eEngineering,2012,9(5):482-493.
[27]张智,张艳瑾,董超,等.广角地震波场特征分析[J].地球物理学进展,2013,28(3):1171-1182,doi:10.6038/pg20130308.Zhang Z,Zhang Y J,Dong C,et al,Analysis on the wideangle seismic wave field character[J].Progress in Geophysics(in Chinese),2013,28(3):1171-1182,doi:10.6038/pg20130308.
[2]滕吉文.中国大陆地壳与上地幔精细结构探测十条第一剖面和其作用与科学意义[J].地球物理学进展,2008,23(5):1341-1354.Teng J W.Ten profiles of artificial-seismic sounding to finestructure of crust and upper mantle in Chinese mainland:Thefirst profiles and its scientific implications[J].Progress inGeophysics(in Chinese),2008,Vol.23(5):1341-1354.
[3]Zhang,Z J,JoseBadal J,Li,Y K,et al.Crust-upper mantleseismic velocity structure across Southeastern China[J].Tectonophysics,2005,395(1-2):137-157.
[4]Zhang,Z J,Wang,G J,Teng,J W,et al.CDP mapping toobtain the fine structure of the crust and upper mantle fromseismic sounding data:an example infor the southeasternChina[J].Phys.Earth Planet.Inter.,2000,122(1-2):133-146.
[5]Xiong,S,Lai,M,Liu,H,et al.Lithosphere structure andvelocity distribution fromin Tunxi to Wenzhou[A].In://Li,J idianD.(Eed.),Lithosphere Structure and GeologicalEvolution of Southeastern China[C].Beijing:MeteorologicalPress,1993.pp.:267-277.
[6]江为为,郝天珧,胥颐,等.中国中南地区综合地质地球物理研究[J].地球物理学报,2007,vol.5(1):171-183.Jiang W W,Hao T Y,Xu Y,et al.Comprehensive geologicaland geophysical study in middle southern region of China[J].Chinese Journalof.Geophys.(in Chinese)ics,2007,vol.5(1):171-183.
[7]王有学,韩果花,姜枚,等.阿尔泰—-阿尔金地学断面地壳结构[J].地球物理学报,2004,vol.47(2):240-249.Wang Y X,Han G H,Jiang M,et al.Crustal structure alongthe geosciences transect from aAltay to aAltun tagh[J].Chinese Journalof.Geophysics.(in Chinese),2004,vol.47(2):240-249.
[8]曾融生,孙为国,毛桐恩,等.中国大陆莫霍界面深度图.地震学报,1995,vol.17(3):322-327.Zeng R S,Sun W G,Mao T E,et al.Depth map of Mohointerface in Chinese continent[J].Acta Sseismologica sSinica(in Chinese),1995,vol.17(3):322-327.
[9]廖其林,王振明,王屏路,等.福州-泉州-汕头地区地壳结构的爆炸地震研究.地球物理学报,1988,vol.31(03):270-280.Liao Q L,Wang Z M,Wang B L,et al.Explosion seismicstudy of the crustal structure in Ffuzhou-Qquanzhou-sShantouregion[J].Chinese Journalof.Geophysics.(in Chinese),1988,vol.31(03):270-280.
[10]尹周勋,赖明惠.华南连县-博罗-港口地带地壳结构及速度分布的爆炸地震探测结果[J].地球物理学报,1999,vol.42(3):384-392.Yin Z X,Lai M H.Crustal structure and velocity distributionfrom deep seismic sounding along the profile of lLianxian-Bboluo-Ggangkou in sSouth cChina[J].Chinese Journalof.Geophysics.(in Chinese),1999,vol.42(3):384-392.
[11]王祖伟,周永章,赵凤清,等.华南地区深部地质研究进展[J].地球科学进展,1997,vol.12(3):259-264.Wang Z W,Zhou Y Z,Zhao F Q,et al.The advance indepthgeology research,sSouth Cchina[J].Adveance inEearth sSciences(in Chinese),1997,vol.12(3):259-264.
[12]吴功建.中国地学断面地球物理研究的进展和展望[J].地球物理学报,1997,vol.40(S1):111-120.Wu G J.Advances and prospects of geophysical research forchina geoscience transects[J].Chinese Journalof.Geophys.(in Chinese)ics,1997,vol.40(S1):111-120.
[13]孔祥儒,熊绍伯,周文星.浙江省深部地球物理研究新进展——屯溪-温州、诸暨-临海地学断面及区域重力研究成果[J].浙江地质,1995,vol.11(1):50-62.Kong X R,Xiong S B,Zhou W X.New progress on deepgeophysical research in zZhejing:geological sections oftTunxi-wWenzhou and zZhuji-lLinhai and the achivements oftheir regioralgravity[J].Geology of Zhejiang(in Chinese),1995,vol.11(1):50-62.
[14]谢窦克,商玉强.东南大陆岩石圈板块地体构造[J].中国地质科学院南京地质矿产研究所所刊,1989,vol.10(4):1-11.Xie D K,Shang Y Q.Lithosphere plate-terrane tectonics ofthe Southeast China continent[J].Bull.Nanjing Inst.Geol.M.R.,Chinese Acad.Geol.Sci.(in Chinese),1989,vol.10(4):1-11.
[15]李智宏,胡中平,王辉明,等.含高速层地震物理模型的广角地震波场研究[J].勘探地球物理进展,2005,28(5):345-348.Li Z H,Hu Z P,Wang H M,et al.Investigation of WARRPseismic wavefield on physical model with a high velocity layer[J].Progress in Exploration Geophysics(in Chinese),2005,28(5):345-348.
[16]孙建国.广角地震在碳酸盐岩地区勘探中的应用[A].//反射地震学论文集[C].上海:同济大学出版社,2000:127-140.Sun J G.The application on wide-angle seismic in the barecarbonate rock area[A].//eEssay collection on reflectionseismography[C].Shanghai:Tongji Uuniversity Ppress(inChinese),2000:127-140.
[17]Xu T,Zhang Z.J,Gao E.G,XuG.MandSunL,et al.Segmentally iterative ray tracing in complex 2D and 3Dheterogeneous block models[J].Bull.Seismol.Soc.Am.,2010,100(2):841-850.
[18]Xu T,Xu G.M,Gao E.G,LiY.C,Jiang X.Y,LuoK,etal.Y.,Block modeling and segmentally iterative ray tracingin complex 3D media[J].Geophysics,2006,71(3):T41-T51.
[19]徐涛,徐果明,高尔根,等.朱良保、蒋先艺,三维复杂介质的块状建模和试射射线追踪[J].地球物理学报,2004,47(6):1118-1126.Xu T,Xu G M,Gao E G,et al.Block modeling andshooting ray tracing in complex 32D media[J].Chinese J.Geophys.(in Chinese),2004,47(6):1118-1126.
[20]王志,贺振华,黄德济,等.广角反射波场特征研究及正演模拟分析[J].地球物理学进展,2003,18(1):116-121.Wang Z,He Z H,Huang D J,et al.The wave-field featuresresearching of wide-angle reflection and the analyzing offorward modeling[J].Progress in Geophysics(in Chinese),2003,vol.,18(1):116-121.
[21]张中杰,白志明,王椿镛,等.冈瓦纳型和扬子型地块地壳结构:以滇西孟连-马龙宽角反射剖面为例[J].中国科学D辑,地球科学,2005,345(5):387-392.Zhang Z J,Bai Z M,Wang C Y,et al.The crustal structureof Gondawana-and Yangtze blocks:An example by wide-angle seismic reflectionprofileing betweenfrom Menglianandto Malong in western Yunnan[J].Science in China(SerialD),2005,48(11):1828-1836.
[22]张中杰,秦义龙,陈赘,等.由宽角反射地震资料重建壳幔反射结构的相似性剖面[J].地球物理学报,2004,47(3):469-474.Zhang Z J,Qin Y L,Chen Y,et al.Reconstruction of thesemblance section for the crust and mantle reflection structureby wide-angle reflection seismic data[J].Chinese J.Geophys.(iIn Chinese),2004,47(3):469-474.
[23]张中杰,何樵登,滕吉文.二维横向各向同性介质中弹性波场差分法模拟稳定性研究[J].长春地质学院学报,1993,(2):205-211.Zhang Z J,He Q D,Teng J W.Stability study for elasticwavefield modelling with finite difference method in 2-dD tim[J].Journal of Changchun uUniversity of Eearth Sscience(inChinese),1993,(2):205-211.
[24]张中杰,何樵登.含裂隙介质中地震波运动学问题的正演模拟[J].石油地球物理勘探,1989,24(3):290-300.Zhang Z J,He Q D.Forward modeling of kinematic problemsof seismic wave in fractured medium[J].Oil GeophysicalProspecting(in Chinese),1989,24(3):290-300.
[25]张中杰,何樵登,徐中信.二维横向各向同性介质2DTIM中人为边界反射的吸收-——差分法弹性波场模拟[J].地球物理学报,1993,36(4):519-527.Zhang Z J,He Q D,Xu Z X.The absorbtion of artificalboundary reflection in 2-D transversely isotropic media withfdm-elastic wavefields modellingmodelling[J].ChineseJournalof.Geophys.(in Chinese)ics,1993,36(4):519-527.
[26]Zhang X Y,Zhang Z J,Xu T,BaiZM,HarrisJMet al.Phaseshift approximation for the post-critical seismic wave[J].Journal of gGeophysics and eEngineering,2012,9(5):482-493.
[27]张智,张艳瑾,董超,等.广角地震波场特征分析[J].地球物理学进展,2013,28(3):1171-1182,doi:10.6038/pg20130308.Zhang Z,Zhang Y J,Dong C,et al,Analysis on the wideangle seismic wave field character[J].Progress in Geophysics(in Chinese),2013,28(3):1171-1182,doi:10.6038/pg20130308.
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