地震资料的加权约束反演方法

A weighted and constrained inversion method for seismic data

地矿部石油物探研究所, 南京210014

Research Institute of Geophysical Prospeeting for Petroleum, Nanjing 210014

在地震资料反演过程中,初始模型的选择很重要。本文将初始模型作为一个独立的数据单元,通过在初始模型和地震道之间加权来定义目标函数,并用约束共轭梯度法求解。本方法对初始模型的精度要求低,运算速度快。文中给出了有井时和无井时的资料处理流程。数值模型和实际资料处理证明该方法具有一定的应用价值。

It is very important to choose an initial model in the process of seislnie invcrsion. in this paperwe take initial model as a indcpcndcnt data unit. define objective function through weightingbetween the initial model and the scismie traces, and find the solutjons by constraincd conjugategradient method. This inversion method inposes no strict restrictions on the accuracy of the initialmodel and has fast computation specd. We present in the paper the data processing floweharts bothwith wells and without wells. The numerical model and the practical data processing shows thatthis method is very useful in our work.