A fast three-dimensional fault interpretation method based on plane navigation

Abstract

The invention relates to a rapid three-dimensional fault interpretation method based on horizontal navigation. The method includes the steps that (1), the fault enhancement interpretative processing is carried out on seismic data, and a seismic data volume fully highlighting fault information is obtained; (2), time slices of which the interest interval reflects the fault plane distribution characteristic are extracted from the seismic data volume, and the time slices serve as horizontal navigation slices for fault interpretation; (3), a fault is selected from the horizontal navigation slices; (4), a seismic section is extracted in the direction perpendicular to the fault strike, and the section of the fault is interpreted at the projection point of the section of the fault; (5), meshing processing is carried out on a navigation plane interpretation result of the selected fault and an interpretation result of the fault of the extracted seismic section, and the results are projected to a newly extracted seismic section, so that the fault interpretation of the seismic section is effectively navigated; (6), under the navigation of the fault plane interpretation, seismic sections are extracted in a rolling mode in the direction perpendicular to the fault strike step by step, and the fault interpretation of the seismic sections is finished until all the seismic sections of the fault is finished; (7), the steps (3)-(6) are carried out repeatedly until interpretation of all faults of the whole area is finished.

Description

technical field [0001] The invention relates to a fault interpretation method in the field of oil and gas exploration, in particular to a fast three-dimensional fault interpretation method based on plane navigation. Background technique [0002] Seismic data interpretation includes three important parts: fault interpretation, horizon interpretation, and target geological body interpretation. At present, the fault interpretation in seismic data interpretation still adopts two-dimensional interpretation, and the real three-dimensional spatial interpretation has not been realized. The existing fault interpretation techniques mainly have the following disadvantages: 1. The fault interpretation has the problem of unclosed space and large errors; 2. The 3D data volume is sparse for 2D fault interpretation, and the degree of information utilization is low; 3. The fault interpretation based on 2D , the application of planar information is insufficient, and the target geological body...

AI Technical Summary

Problems solved by technology

The existing fault interpretation techniques mainly have the following disadvantages: 1. The fault interpretation has the problem of unclosed space and large errors; 2. The 3D data volume is sparse for 2D fault interpretation, and the degree of information utilization is low; 3. The fault interpretation based on 2D , insufficient application of planar information, unclear understanding of target geological bodies

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