Improvement of a methodology for interpretative control of seismic data processing in Western Siberia in order to improve the quality of riverbed forecasting

This article presents the results of the reprocessing of the materials of the CDPM 3D seismic survey (using the common depth point method) of the combined seismic survey that is consisted of surveys of 4 separate license areas located in Western Siberia. Using the example of these materials, the importance of the role of interpretative processing control (IPC) for the purpose of improving the quality of seismic data prepared for subsequent interpretation is demonstrated in detail. IPS is the constant monitoring of changes in the quality of seismic data sequentially at each stage of processing. The constant interaction of the IPS group with processing specialists is necessary to control the quality of the performed procedures aimed at increasing the resolution of the seismic image and, as a result, improving the traceability of target objects, in particular in this article — channel objects. Frequency analysis of seismic data was used to compare the quality of paleochannels traceability in previous and new surveys. This analysis is based on RGB (red-green-blue) frequency summation. According to the results of the re-processing of 2023, significant detailing of paleochannel objects in the range of target Tyumen deposits was noted. The authors also used a specially trained neural network for searching for riverbeds, showing how much better/worse riverbed objects are traced when applying a particular processing procedure. Based on the results obtained, a consensus was formed on the acceptance or non-acceptance of the results of a particular procedure of the conducted IPS.

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