Three-dimensional seismic data quick edge detection method based on time domain generalized Hilbert conversion

Abstract

The invention discloses a three-dimensional seismic data quick edge detection method based on time domain generalized Hilbert conversion. The method includes the following steps that an objective interval of three-dimensional seismic data serves as a research object, the three-dimensional seismic data are input, a three-dimensional equitime slice calculation method is adopted, and a two-dimensional equitime slice of the objective interval is calculated; two one-dimensional Ehrlich's factors of a time domain are calculated to obtain an edge detection result of the current equitime slice; an ultimate edge detection result of the current slice is obtained; equitime slice numbers are replaced, and all the equitime slices are calculated; according to the positions of the equitime slices in the objective interval, edge detection results of the equitime slices are stored to obtained an ultimate three-dimensional edge detection result of the objective interval. The method has high edge detection accuracy, is high in calculation efficiency and guarantees that all sampling points are located on the respective equitime slices; underground geological conditions closest to reality are obtained, and meanwhile, restoration of the edge detection result is facilitated.

Description

technical field [0001] The invention belongs to the technical field of oil and gas geophysical exploration and relates to a fast edge detection method for three-dimensional seismic data based on time-domain generalized Hilbert transform. Background technique [0002] In the field of oil and gas geophysical exploration, edge detection methods are mainly used to find faults or fracture development zones. Among them, the prediction of fracture development zones is of great significance to the exploration and development of oil and gas, especially in carbonate reservoirs, where fractures, pores and vugs are the main migration channels and storage spaces for oil and gas. [0003] Pores, cracks (cracks) and dissolved pores are ubiquitous in rocks or rock formations in nature, and their shapes and scales are also very different. For seismic exploration, due to the limitation of resolution, it is impossible to identify individual pores, holes, and fractures, and only fracture devel...

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Problems solved by technology

[0056] The purpose of the embodiments of the present invention is to provide a fast edge detection method for 3D seismic data based on the generalized Hilbert transform in the time domain, aiming at solving the lack of existing edge detection methods for 3D seismic data; the calculation efficiency of edge detection is low, and the calculation accuracy is low The problem

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