Automated Travel-Time Picking for Pre-Salt Reflection Events for OBN Data

Abstract

Summary Performing velocity analysis step aiming to estimate velocity of a reflection event, by inverting travel-time curves, demands the extraction of the arrival times of a reflection event in order to obtain its travel-time curve. This extraction is usually performed manually or with techniques which are not automated. For this reason, we propose a technique able to extract travel-time curves of reflection events related to pre-salt structures by reconstructing and comparing their seismic spectra. With our technique, it is possible to find, in a reliable manner, each wavelet and each arrival time of PP and PS reflection events for a pre-salt structure and with OBN data.