Modeling a Priori Information on the Velocity Field in Reflection Tomography

D. Sinoquet (1)

1 IFPEN - IFP Energies nouvelles

Reflection tomography consists in determining a velocity field and reflector geometries from traveltimes picked on multioffset seismic section. The solution of the tomographic inverse problem being underdetermined, we need to integrate a priori information on the model. A regularization by means of model curvature has in general no physical justification and leads to geologically incorrect models. This paper presents a formulation that integrates in a realistic way a priori geological information associated with the regularity of the model and with the relation between the velocity distribution and the interface geometries. Such an integration seems particularly critical when dealing with smooth velocity models in which velocity and interfaces are defined independently from each other. We validate the interest of our formulation on a real data example.

Domains: Mathematics [math]

D. Sinoquet. Modeling a Priori Information on the Velocity Field in Reflection Tomography. SEG Annual Meeting, Sep 1993, Washington, United States. ⟨hal-02284180⟩