图形科学公司的GEODEPTH反演法的理论基础和说明

GRAPHIC SCIENCE GEODEPTH INVERSION BACKGROUND AND DESCRIPTION

SGl公司

Silicom Graphics Inc.

地震解释的主要目的是估算地下模型参数及获取详细的地下构造图象。根据叠加时间数据得出深度图象所用的最常见方法是以迪克斯((Dix)公式,(1955))为基础的。该公式把叠加速度转换为层速度。然而,上述方法未考虑时间-深度换算问题的复杂性。而应用综合地震反演的方法:如图形科学公司的GEODEPTH软件包里所实现的一种方法,则可得出更加精确的深度图象。

The main goal of seismic interpretation is to estimate subsurface model parameters and to obtain a detiled Image of the subsurface structure. The most common methods used for producing depth images from stacked time data were based on Dix’formula (1955), converting stacking velocities to interval velocities. However, these methods do not take into account the complexity of the time-to-depth conversion problem. More accurate depth images can be achieved by applying comprehensive seismic inversion methods such as the one implemented in the Graphic Science GeoDepth software package.