oa Prestack Signal Enhancement by Multi-parameter Common Offset MultiFocusing

Imaging in complex areas is of great importance in seismic imaging. First of all it is connected to the ability to extract valuable information from the raw seismic data and to use this information for constructing of a reliable velocity model, which is a crucial step in depth imaging. In such case, time processing is a necessary step to improve signal to noise ratio in the raw data. Moreover, results of time imaging can significantly help to create reliable velocity models and consequent depth images. Improving the quality of prestack data always stays in focus of intensive research. In this paper we follow an approach presented by Berkovich et al. (2011) which proposes using a local COMF approximation for traveltime stacking surface description. It allows for an arbitrary common offset adequately approximate traveltimes of seismic events in the vicinity of a CMP position. The paper presents application of the proposed procedure on synthetic and real data including imaging using the improved seismic data.