Using Converted-wave Moveout Equation to Detect a Sequence of Velocity Inversion.

The layers above a hydrocarbon reservoir can present very idiosyncratic characteristics. One characteristic which can be found is concerning a formation with an abrupt velocity inversion, in other words, a layer with abnormally low P and S wave velocities. As the nonhyperbolic multiparametric approximation proposed by Li and Yuan (2001) suffers to perform the velocity analysis of a model with velocity inversion, it is possible to use this fact to detect in which layer there is a velocity abnormally low. In this work, it was studied a model with two velocity inversions, and it was defined that the more shallow velocity inversion can be clearly detected. However the other, underlying to the first one cannot.