不整合面下隐伏逆冲断层反射地震成像模拟研究
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摘要
针对不整合界面下的逆冲断层进行反射地震勘探的可行性问题,进行了一项波动方程正演模拟数值试验。勘探的地质目标包括断层的断面形态,以及附近几个厚度仅仅为几米的地质透镜体。根据掌握的地质资料建立地震参数模型,用波动方程正演模拟技术模仿地震勘探观测系统的施工方式,滚动放炮合成了38炮地震数据,然后按照生产资料处理流程对这些数据进行处理,最后得到地震波速度模型剖面、地震数据叠加剖面以及偏移剖面等图像成果。试验结果表明,如果采用较高频率的震源信号,反射勘探地震成像方法可以有效地揭示不整合面下隐伏逆冲断层的空间展布形态,辨识地质透镜体存在。研究表明,选用主频为150Hz的高频率震源信号,可以使勘探达到最佳的分辨效果。
A numerical experiment using seismic wave equation forward modeling was carried out to test the feasibility of reflection seismic exploration of a thrust underlying an unconformity.The geological targets for the exploration include the fault and a few geological lenses as thin as only a few meters.Using the geological information available,a seismic model was built.Seismic wave equation forward modeling was then performed to mimic the approach of seismic acquisition.In total 38 shot gathers of seismic data were synthesized.Then data processing yielded a seismic velocity profiles,a CDP stack profile and a migration profile.The experiment results show that,if high frequency source signals are used,seismic reflection exploration can effectively reveal the thrust fault and the geological lenses.Our experiments show that using source signals with dominant frequency at 150 Hz can achieve the best resolution.
引文
[1]翁文灏.热河北票附近地质构造研究[J].地质汇报,1928,(11):1-23.WENG W H.Research geological structure near Beipiao of Rehe[J].Geological Report,1928(11):1-23.(In Chinese)
    [2]郑亚东.我国发现阿尔卑斯特大型推覆构造及变质核心杂岩[J].中国地质,1990(6):32.ZHENG Y D.Found the Alpine large nappe tectonic and complex core metamorphic in China[J].Chinese Geology,1990(06):32.(In Chinese)
    [3]郑亚东.G.A.DAVIS,王琮,等,内蒙古大青山大型逆冲推覆构造[J].中国科学D辑,1998(4):289-295+385-386.ZHENG Y D,DAVIS G.A.,WANG Z,et al.Large thrust nappe structure in Daqing mountain of Inner Mongolia[J].Science in China(Series D),1998(04):289-295+385-386.(In Chinese)
    [4]朱志澄.逆冲推覆构造研究进展和今后探索趋向[J].地学前缘,1995(1):51-58.ZHU Z C.Progress and trends of researches on thrust-nappe tectonics[J].Earth Science Frontiers,1995(01):51-58.(In Chinese)
    [5]TODD A.PETERSEN,LARRY D.BROWN,Frederick A.Cook,et al.Structure of the Riddleville Basin from COCORP Seismic Data and Implications for Reactivation Tectonics[J].Geology,1984,92:261-271.
    [6]P.A.REASENBERG.大地震前发生的前震[J].世界地震译丛,2002(1):1-17.P.A.REASENBERG.Foreshock occurrence before large earth-quakes[J].Translated World Selsmology.2002(01):1-17.(In Chinese)
    [7]蔡学林,曹家敏.四川盆地变形构造格局及其对地震活动的控制作用[J].四川地震,1998(3):27-35.CAI X L,CAO J M.The deformed structures framework control function on earthquake in Sichuan basin[J].Earthquake Research in Sichuan,1998(03):27-35.(In Chinese)
    [8]李德威,陈桂凡,陈继乐,等.地震预测:从芦山地震到大陆地震[J].地学前缘,2013(3):1-10.LI D W,CHEN G F,CHEN J L,et al.Earthquake prediction:From Lushan earthquake to continental earthquakes[J].Earth Science Frontiers,2013(03):1-10.(In Chinese)
    [9]嵇艳鞠,林君,于生宝,等.ATEM瞬变电磁系统在长春市活断层勘探中的应用[J].吉林大学学报,2005(7):99-103.JI Y J,LIN J,YU S B,et al.Sounding application of ATEM instrument in Changchun active fault[J].Journal of Jilin University(Earth Science Edition),2005(07):99-103.(In Chinese)
    [10]邓起东,卢造勋,杨主恩.城市活动断层探测和断层活动性评价问题[J].地震地质,2007(6):189-200.DENG Q D,LU Z X,YANG Z E.Remarks on urban active faults exploration and associated activity assessment[J].Seismology and Geology,2007(02):189-200.(In Chinese)
    [11]常旭,李林新,刘伊克,等.北京断陷黄庄—高丽营断层伪随机可控震源地震剖面[J].地球物理学报,2008,51(5):1503-1510.CHANG X,LI L X,LIU Y K,et al.Seismic profile of Huangzhuang-Gaoliying fault in Beijing by Minisosie method[J].Chinese J.Geophys,2008(05):1503-1510.(In Chinese)
    [12]刘保金,张先康,陈顒,等.三河-平谷8.0级地震区地壳结构和活动断裂研究-利用单次覆盖深反射和浅层地震剖面[J].地球物理学报,2011,54(5):1251-1259.LIU B J,ZHANG X K,CHEN Y,et al.Research on crustal structure and active fault in the Sanhe-Pinggu Earthquake(M 8.0)Zone based on single-fold deep seismic reflection and shallow seismic reflection profiling[J].Chinese J.Geophys,2011(05):1251-1259.(In Chinese)
    [13]酆少英,龙长兴,高锐,等.高分辨折射和浅层反射地震方法在活断层探测中的联合应用[J].地震学报,2010(6):718-724+767.FENG S Y,LONG C X,GaAO R,et al.Joint application of high-resolution refraction and shallow reflection seismic exploration approach to active fault survey[J].Acta Seismologica Sinica,2010(6):718-724+767.(In Chinese)
    [14]顾勤平,康清清,许汉刚,等.薄覆盖层地区隐伏断层及其上断点探测的地震方法技术—以废黄河断层为例[J].地球物理学报,2013,56(5):1609-1618.GU Q P,KANG Q Q,XU H G,et al.Seismic exploration methods for buried faults and its up-breakpoint in thin sediment areas-An example of the Feihuanghe fault[J].Chinese J.Geophys,2013(5):1609-1618.(In Chinese)
    [15]赵成斌,孙振国,顾梦林.玛纳斯地震区地壳浅部构造特征探测研究[J].地球物理学报,2001,44(01):54-63.ZHAO C B,SUN Z G,GU M L.Prospecting and study on shallow crust structure in Manas earthquake area[J].Chinese J.Geophys,2001(01):54-63.(In Chinese)
    [16]卢育霞;袁道阳;胡明清,等.2003年甘肃民乐-山丹地震隐伏发震构造的浅层地震勘探研究[J].地震学报,2010,32(3):351-360.LU Y X,YUAN D Y,HU M Q,et al.Shallow seismic exploration on buried seismogenic structure of the 2003Minle-Shandan earthquakes in Gansu[J].ActaSeismologica Sinica,2010(3):351-360.(In Chinese)
    [17]王咸彬.西部复杂山地地震勘探关键技术应用研究[D].成都:成都理工大学,2008.WANG X B.Application research of seismic exploration key technologys in complex mountanious region of western China[D].Chengdu:Chengdu University of Technology,2008.(In Chinese)
    [18]BROUWER J H.Improved NMO correction with a specific application to shallow-seismic data[J].Geophysical Prospecting,2002,50:225-237.
    [19]STEEPLES D W,Miller RD.Avoiding pitfalls in shallow seismic reflection surveys[J].Geophys.1998,63(4):1213-1224
    [20]CHANG X,LIU Y K,WANG H,et al,3-D tomographic static correction[J].Geophys.2002,67(4):1275-1285.
    [21]蒋先艺.基于二维与三维复杂结构模型正演的地震数据采集设计方法研究[D].成都:成都理工大学,2003.JIANG X Y.The study of seismic acquisition method based on modeling of 2D and 3D complex geologic structure[D].Chengdu:Chengdu University of Technology,2003.(In Chinese)
    [22]CONNOLLY P.Elastic Impedance[J].The Leading Edge 18(4):438-352.
    [23]KANASEWICH E R.Time Sequence Analysis in Geophysics.University of Alberta.
    [24]CLAERBOUT J F.Imaging the Earth's Interior[M].Blackwell Scientific Publications,1985.
    [25]YILMAZ O,CLAERBOUT J F.Pre-stack partial migration[J].Geophysics,1980,45(12):1753-1779.
    [26]ADLER F.Kirchhoff image propagation,in 70th Annual Internat.Mtg.,Soc.Expl[J].Geophys.,Expanded Abstracts:Soc.Geophys,2000(1):988-991.
    [27]马在田.地震偏移成像技术—有限差分偏移[M].北京:石油工业出版社,1989.MA Z T.Seismic migration imaging technique-finite difference migration[M].Beijing:Petroleum Industry Press,1989.(In Chinese)
    [28]马在田.高阶近似有限差分偏移[J].石油地球物理勘探,1982(17):6-15.MA Z T.The migration of higher-order equation by finite difference method[J].Oil Geophysical Prospecting,1982(17):6-15.(In Chinese)
    [29]LEOWENTHAL D,LU L,ROBERSON R,SHERWOOD J.The waveequation applied to migration[J].Geophysical Prospecting,1976,24(3):380-399.
    [30]孙自明.新疆北部哈拉阿拉特山走滑—冲断复合构造特征与油气勘探方向[J].地质科学,1999,18(04):438-352.SUN Z M.Strike-slip-thrust composite structures and its relationships to hydrocarbon in Hala'alate mountains,northern Xinjiang[J].Chinese Jounal of Geology,2008(02):309-320.(In Chinese)

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