Fracture identification method and fracture identification device of seismic data

Abstract

The invention provides a fracture identification method and a fracture identification device of seismic data, wherein the fracture identification method comprises the steps of acquiring the seismic data of a work area; after grouping azimuths of the work area, stacking the seismic data of the azimuths in each group, thereby obtaining a plurality of groups of stacked seismic data; after compressing the fracture identification attribute of each group of stacked seismic data, fusing the plurality of obtained fracture identification attributes, thereby obtaining the fracture identification attribute of the seismic data; and performing fracture identification on the work area according to the result. According to the fracture identification method and the fracture identification device, through compressing the fracture identification attributes of the seismic data in different types, generality of each attribute to fracture identification is kept; abnormity information in various facture identification attributes is eliminated; and seismic attribute signal-to-noise ratio is greatly improved. By means of fusion technology, fracture information of different azimuths are fused, thereby protruding fracture identification difference of each azimuth, improving fracture identification precision and identification capability and finally improving oil-gas exploration efficiency.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a fracture identification method and device for seismic data. Background technique [0002] Fault is a ubiquitous and relatively complex geological phenomenon, which plays an important role in controlling the migration and accumulation of oil and gas, and is closely related to the formation, distribution and enrichment of oil reservoirs. Therefore, it is very important to correctly interpret faults and clarify their distribution and shape to identify and describe oil and gas reservoirs. [0003] The existence of faults will cause abnormal phenomena such as dislocation of seismic reflection waves, changes in the number of isotropic axes, or sudden changes in amplitude and phase. These phenomena will lead to corresponding changes in seismic attributes. Conventional fault identification methods are mainly based on fine structure interpretation, by calculating and anal...

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Problems solved by technology

[0006] Embodiments of the present invention provide a method and device for fracture identification to solve the problem that it is difficult to obtain tiny fractures hidden in the three-dimensional seismic data volume when only coherent volume attributes or curvature attributes are used for fracture identification of seismic data in the prior art information problem

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