基于构造约束的波阻抗边界刻画  

Edge depiction of impedance model basing on structure constraints

作　　者：张宏兵[1] 杨长春[2] 尚作萍[1] 

机构地区：[1]河海大学土木工程学院,南京210098 [2]中国科学院地质与地球物理研究所,北京100101

出　　处：《地球物理学进展》2007年第3期817-825,共9页Progress in Geophysics

基　　金：中国科学院重大创新项目(KZCX1-SW-18);河海大学科技创新基金资助项目(2004400711)

摘　　要：通过边界保护正则化和约束反演,在反演的目标函数中引入各种先验信息约束,以解决波阻抗反演的病态问题和带限问题.为了克服波阻抗模型边界过于平滑,在反演中引入地层和断层等构造信息约束,并且通过调整地层分界面和断层处的正则参数值来实现构造约束.此外,采用各向异性扩散法进行平滑处理,改善反演结果.通过合成数据测试和实际资料反演,证明了本文提出的方法对刻画模型边界是有效的.By using the edge-preserving regularization and constraint inversion, we introduce various prior information constraints in the objective function to solve the ill-posed and band-limited problem for the impedance inversion. To overcome over-smoothed impedance model edge, we introduce the geologic structures constraints of layers and faults which be achieved by adjusting regularization parameters at layer interfaces and faults. Moreover, we improved the inversion result by using anisotropic diffusion method. Through testing both synthetic data and field data sets, it is demonstrated that the method is valid for preserving edges of model.

关 键 词：波阻抗反演 构造约束 正则参数 各向异性扩散法 

分 类 号：P631[天文地球—地质矿产勘探]