摘要
广义线性反演是地震资料反演中经常采用的方法之一。这一方法要求反复计算雅可比矩阵。而雅可比矩阵的形成依赖于所采用的地球物理模型和制造人工合成记录所用的数学公式。对于声学层状介质来说，由点震源激发的地震波的传播问题可有解析解。在该问题的反演中，基于这一解析解可得到计算雅可比矩阵的递推公式，从而简化了计算程序，节省了时间。对于模型数据来说，用广义线性反演可以改进平面波延拓反演的结果。特别是较大地提高了反演密度的精度。但是，对于实际地震资料，或者加有噪音的模型数据，反演就极难成功。
Generalized linear inversion is one of the methods commonly used to do inversion for seismic data. This method needs to calculate Jacobi matrix over and over again, and Jacobi matrix depends on the adopted geophysical model for inversion and mathematical formula to produce synthetic data. For acoustical layered medium, there is an analysis solution of seismic wave propagation problem with point source. In the inversion of that model, a set of recurrence formula to calculate Jacobi matrix can be obtained based on the analysis solution. Therefore, the computer programe is more simple, and the computer time is saved. For modeling data, results of inversion using plane-wavefiled downward continuation can be improved by generalized linear inversion, especialy, the accuracy of inversion density has been greatly increased. But, for field data or modeling data with noise, it is very difficult to succeed by using generalized linear inversion.
出处
《中国海上油气（地质）》
1993年第2期53-60,共8页
China Offshore Oil and Gas(Geology)
关键词
叠前地震资料
广义线性反演
地震资料处理
叠前反演
Seismic data processing
Generalized linear inversion
Inversion of pre-stacked data
