Depth imaging and velocity calibration by 3D adaptive tomography

Reflection tomography is an effective technology for reconstructiong a macro-model of the Earth, i.e. its major velocity anomalies and reflectors, especially in complex 3D geological structures. After the pioneering papers of Gjoystdal & Ursin (1981) and Bishop et al. (1985), traveltime inversion of reflected and refracted arrivals has been used to improved static corrections and near-surface imaging. The authors of this article have processed a data set over important producing fields which was acquired by OMV in the Vienna Basin, between Vienna and the border with the Slovak Republic. The tectonic complexity of the area, with major faults and static problems, made this data set a severe test of the robustness of the algorithms they have developed.