The article is devoted to solving the problem of increasing the accuracy of structural imaging and the possibility of more detailed tracing of tectonic dislocation by using prestack depth migration processing (PSDM) on the example of the seismic data of Rosneft Oil Company. Unfortunately, the tools for the conventional time processing sequence do not always enable to compensate existing deep velocity anomalies (specific features of Western Siberia such as zones gas deposits, abnormally high pressure formation zones, various local anomalies), which negatively affect the results of structural interpretation. On the contrary, the technology of prestack depth migration enables to obtain image of geological structure with less error, to take into account the influence of velocity anomalies on the wave field, and to improve faults imaging. The article presents the results of PSDM, using the examples of two deposits developed by Rosneft oil company in the north of Western Siberia. During both surveys the processing was performed using domestic software Prime, which is fully functional software for interactive interpretive processing of seismic data, developed in accordance with the modern concepts of depth processing. The examples, despite the different nature of the velocity depth anomalies, in both cases illustrate the successful experience of using PSDM. The materials presented in the article prove that the synergy in the working of related specialists (processing, interpretation and geology) and the continuity of the stages of studying the deposit lead to the best results.
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