断层几何形态反演的计算机模拟  

COMPUTER SIMULATION OF FAULT GEOMETRIC SHAPE INVERSION

作　　者：陈伟[1] 杨扬[1] 

机构地区：[1]西南石油大学,四川成都610500

出　　处：《物探化探计算技术》2008年第6期490-493,共4页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金重点项目资助(40437018)

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.

关 键 词：构造反演 拉张构造 推覆构造 单剪变形 平衡剖面 地震剖面解释 

分 类 号：P631.4[天文地球—地质矿产勘探]