PSDM Velocity Model Building and Application – Case Study in KUCHE Foreland Basin

It is well known that PSDM is the best way to get high quality imaging of complex, steep-dip structures. However, in KUCHE foreland basin (western China) conventional PSDM is seriously challenged because the topography is very complicated, the sub-surface geological structure is severely distorted and lateral strata vary rapidly. The purpose of our study is to set up a suitable modeling procedure, through analysis of the main elements affecting image quality, to derive accurate depth-velocity models in such complicated environments. We accomplish this through a combination of surface and sub-surface information that effectively enhances imaging accuracy.