Seismic deposition feature enhanced filtering method and device

Abstract

According to the seismic deposition feature enhanced filtering method and device provided by the invention, hierarchical extraction of stratigraphic deposition information on seismic slices is realized through multi-scale two-dimensional wavelet decomposition, and seismic deposition information of a target geologic body can be enhanced and highlighted; meanwhile, the extracted seismic slice low frequency and corresponding residual errors (high-frequency components) both contain rich seismic deposition information, and the seismic deposition analysis precision can be improved through combined application of the high-frequency information and the low-frequency information; furthermore, the geologic body boundary can be clearly highlighted based on seismic slice information, and important guidance information is provided for fine description of transverse distribution of the reservoir; finally, the algorithm is simple and easy to implement, the operation efficiency is high, man-machine interaction is not needed, and a software function module is easy to form for popularization and application.

Description

technical field [0001] The present invention relates to the technical field of seismic exploration, and more specifically, to a method and device for enhancing filtering of seismic sedimentary features. Background technique [0002] In the field of oil and gas field exploration and development, seismic data has always been an important guiding information for the analysis of reservoir sedimentary characteristics due to its wide coverage and strong lateral continuity. Especially in areas with few or no wells, the reservoir sedimentary characterization based on seismic data Analysis is an important method to find the distribution of underground oil and gas resources. However, due to the absorption and attenuation of seismic waves by strata, seismic exploration usually faces a series of constraints such as low signal-to-noise ratio, low dominant frequency, and narrow frequency width. The analysis of reservoir sedimentary characteristics based on seismic information usually has ...

AI Technical Summary

Problems solved by technology

First of all, due to the limitation of seismic vertical resolution, there will be interference effect between adjacent geological bodies at different vertical depths, resulting in a decrease in seismic vertical resolution; secondly, seismic reflection waves of multiple horizontally adjacent geological bodies also exist The problem of mutual interference reduces the lateral resolution capability of seismic data; in addition, due to data noise, multiple waves, etc. caused by cluttered reflection characteristics and inaccurate seismic migration homing during seismic wave propagation underground, it is difficult for seismic slice-based identification Underground geological bodies also have a certain destructive effect

Images