Modern technology for seismic data processing in Srednebotuobinskoye oil-gas-condensate field

UDK: 550.834.05(26)
DOI: 10.24887/0028-2448-2021-2-31-35
Key words: seismic exploration, seismic processing, depth migration, upper section, depth velocity model, tomography, multiple waves
Authors: A.B. Kleshnin (RN-Exploration LLC, RF, Moscow), D.N. Tverdokhlebov (RN-Exploration LLC, RF, Moscow), E.I. Goguzeva (Taas-Yuriakh Neftegazodobycha LLC, RF, Lensk), R.S. Melnikov (Rosneft Oil Company, RF, Moscow)

Srednebotuobinskoye oil-gas-condensate field, being one of the oldest fields in Yakutia, has been well studied by both 2D and 3D seismic surveys. Extensive experience has been accumulated in processing seismic data in this region, which allows obtaining data of acceptable quality. However, a number of unresolved problems remain that significantly complicate obtaining high-quality seismic images and interpretation.

The paper presents the main problems inherent in seismic data at the Srednebotuobinskoye field (near-surface, trap bodies, multiples, etc.). On the example of the special processing performed with the use of prestack depth migration, ways of solving these problems based on advanced technologies for seismic data processing are demonstrated. Methods for constructing near-surface model based on tomographic refinement and surface wave inversion, methods for compensating for the influence of the trap on the underlying layers are presented. In the area of signal processing, advanced multiple suppression and noise attenuation technologies are described based on modeling and adaptive noise substraction. An integrated approach to processing, developed by Rosneft Oil Company specialists using prestack depth migration, significantly improved the quality of seismic data and increased the reliability of interpretation. However, not all problems remained resolved. The article provides recommendations for the further development of seismic technology to improve the quality of seismic material in the future. Recommendations are given for development both in the field of seismic data processing (new approaches to signal processing, FWI, etc.), seismogeological modeling, and in the field surveys (increasing the density of surveys, using nodal recording systems).


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