断层几何形态反演的计算机模拟
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摘要
构造反演是指利用构造变形形态反推使之变形的断层的几何参数。在拉张构造区域,从理论上解决构造反演问题是相当成功的。而对于挤压推覆构造区域,由于其逆断层因上盘上升过程,使得其推算的断层只能获取下盘断点以下的构造形态,所以在实际运用中,特别是对于复杂构造叠加区域,其反演过程更多的是依靠人工干预的方法来进行。鉴于此,利用较成熟的拉张构造区域的理论方法,自行提出了单剪变形的挤压构造反演方法来完善,并通过计算机模拟来实现,以此为正演平衡剖面计算,提供一个初始的断层几何模型,并为验证地震剖面解释的合理性提供辅助作用。
The method of fault geometrical parameter that to bring about tectonic deformation through known deformation characteristics is called structure inversion.Since the inversion problems of structure is resolved so successful in the region of pull-apart structure,but poor to the region of nappe structure,by the reason of rising reverse fault top wall,we can just calculate the fault geometry under the footwall breakpoint.So actually,we often take the manual intervention through the process of inversion especially to the structural superimposed region.Accordingly,we propose a method of single shear deformation at the region of nappe structure with the mature theory of pull-apart structure region,and furthermore,the process is simulated by computer.So that we can offer an initial geometric model of faults,and take an auxiliary function on the reasonable seismic section interpretation.
The method of fault geometrical parameter that to bring about tectonic deformation through known deformation characteristics is called structure inversion.Since the inversion problems of structure is resolved so successful in the region of pull-apart structure,but poor to the region of nappe structure,by the reason of rising reverse fault top wall,we can just calculate the fault geometry under the footwall breakpoint.So actually,we often take the manual intervention through the process of inversion especially to the structural superimposed region.Accordingly,we propose a method of single shear deformation at the region of nappe structure with the mature theory of pull-apart structure region,and furthermore,the process is simulated by computer.So that we can offer an initial geometric model of faults,and take an auxiliary function on the reasonable seismic section interpretation.
引文
[1]陈伟,卢华复,施央申.平衡剖面计算机模拟及其应用[M].北京:科学出版社,1993.
[2]TINGGUANG SONG,PETER A.CAWOOD.Effects ofsubsidiary faults on the geometric construction of listricnormal fault systems[J].AAPG Bulletin,v,2001,85,(2):221.
[3]施泽进,施央申,张渝昌.反演断层数学模型的建立和应用[J].成都理工学院学报,1994,21(1):23.
[4]徐果明.反演理论及其应用[M].北京:地震出版社,2003.
[5]朱志澄.逆冲推覆构造研究的进展和今后探索趋向[J].地学前缘,1995,1:48.
[6]马杏垣.论伸展构造[J].地球科学-中国地质大学学报,1982,3:56.
[7]NOVOAS E J,SUPPE,J HSHAW.Inclined-shear res-toration of growth folds[J].AAPG Bulletin,2000,84(6):787.
[8]BOYER S E,ELLIOTTD.Thrust systems[J].AAPG,1982,66:1196.
[9]SUPPE J C,CONNoRS,Y ZHANG.Shear fault-bendfolding,in K.R.McClay,ed.,Thrust tectonics andhydrocarbon systems[J].AAPG Memoir,2004,82:303.
[10]MOUNT,V S,J SUPPE,S C.HOOK.Aforward mod-eling strategy for balanced cross sections[J].AAPGBulletin,1990,74(5):521.
[11]SHAW J H,J SUPPE.Active faulting and growth fold-ing in the eastern Santa Barbara Channel[J].Califor-nia:Bulletin of Geological Society of America,1994,106:607.
[12]SUPPE J.Princlples of Structural Geology:EnglewoodCllffs[J].New Jersey,U.S.A.,Prentice-Hall,1985:537.
[13]MEDWEDEFF D A.and J.SUPPE.Multibend fault-bend folding[J].Journal of Structural Geology,1997,19:279.
[2]TINGGUANG SONG,PETER A.CAWOOD.Effects ofsubsidiary faults on the geometric construction of listricnormal fault systems[J].AAPG Bulletin,v,2001,85,(2):221.
[3]施泽进,施央申,张渝昌.反演断层数学模型的建立和应用[J].成都理工学院学报,1994,21(1):23.
[4]徐果明.反演理论及其应用[M].北京:地震出版社,2003.
[5]朱志澄.逆冲推覆构造研究的进展和今后探索趋向[J].地学前缘,1995,1:48.
[6]马杏垣.论伸展构造[J].地球科学-中国地质大学学报,1982,3:56.
[7]NOVOAS E J,SUPPE,J HSHAW.Inclined-shear res-toration of growth folds[J].AAPG Bulletin,2000,84(6):787.
[8]BOYER S E,ELLIOTTD.Thrust systems[J].AAPG,1982,66:1196.
[9]SUPPE J C,CONNoRS,Y ZHANG.Shear fault-bendfolding,in K.R.McClay,ed.,Thrust tectonics andhydrocarbon systems[J].AAPG Memoir,2004,82:303.
[10]MOUNT,V S,J SUPPE,S C.HOOK.Aforward mod-eling strategy for balanced cross sections[J].AAPGBulletin,1990,74(5):521.
[11]SHAW J H,J SUPPE.Active faulting and growth fold-ing in the eastern Santa Barbara Channel[J].Califor-nia:Bulletin of Geological Society of America,1994,106:607.
[12]SUPPE J.Princlples of Structural Geology:EnglewoodCllffs[J].New Jersey,U.S.A.,Prentice-Hall,1985:537.
[13]MEDWEDEFF D A.and J.SUPPE.Multibend fault-bend folding[J].Journal of Structural Geology,1997,19:279.
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