三维叠前深度偏移的建模技术

The model building technology in 3-D pre-stack depth migration

南京理工大学 江苏南京210014

Nanjing University of Technology,Nanjing 210014,China

在三维叠前深度偏移过程中,速度模型建立是至关重要的一步,它直接关系到偏移成像的效果。目前,已提出的建模方法很多,但实用化的并不多见,叠前深度偏移的建模技术仍处于进一步完善的过程中。为此,以实用为前提,研究了一种三维建模技术,并从该技术基于的方法理论、初始模型的建立、模型的修改与验证、模型的修饰及显示等几个方面作了阐述.

Velocity model building is a vital step for 3 D pre stack depth migration, which has an important bearing on the effect of migration. Although there are a great many of model building methods available,practical methods are not emerged yet, there is still a long way to go in the refinement of model building methods for pre stack depth migration. This paper describes a new 3 D model building technique which features easy to use and cost effective. The following aspects are discussed in the paper, that is, the theory that the technique is based upon, construction of initial model, update and verification of the model, as well as modification and display of the model.