Seismic horizon automatic extraction device and method based on dynamic planning

Abstract

A seismic horizon automatic extraction method based on dynamic programming is characterized by comprising the following steps: step 1, obtaining an initial horizon near a target seismic horizon to besolved; step 2, taking the initial horizon as a center, selecting a window with a proper size, and selecting a small area containing a target horizon; step 3, according to the initial horizon, flattening the image of the selected small area; step 4, searching a global optimal path in the small area by using a dynamic planning method; and step 5, inversely transforming the obtained optimal path into an initial coordinate space to obtain an optimized target seismic horizon of the required solution. According to the method, the correct seismic horizon can be effectively picked up, and even the seismic horizon with the consistent phase can still be accurately and automatically tracked in a complex discontinuous area in seismic data. Detailed geological structure information can be well revealed, the calculation cost can be greatly reduced, and time is saved.

Description

technical field [0001] The invention relates to seismic data analysis in seismic data interpretation, in particular to extracting seismic horizons from seismic images. Background technique [0002] Extracting seismic horizons is a fundamental step in seismic interpretation. Seismic horizons are considered strata that match constant geological ages, represent geologically synchronous surfaces, and are also important for identifying structural and stratigraphic features. In addition, people also use horizons to analyze the ancient sedimentary environment and landform characteristics. [0003] In the initial earthquake interpretation, people mainly relied on manual interpretation, which required a lot of labor and time. In the face of huge seismic data and complex geological structures, manual interpretation will lead to low efficiency, so people have proposed different automatic or semi-automatic methods for picking seismic horizons, but these methods also have different prob...

AI Technical Summary

Problems solved by technology

[0008] 1. In areas where events are discontinuous in seismic data (for example, faults, noise, etc.), traditional methods cannot automatically extract accurate seismic horizons with consistent phases;

[0009] 2. Traditional methods often extract over-smooth seismic horizons, which cannot reveal detailed geological structure information;

[0010] 3. Traditional methods require high computational costs and cannot meet the current needs for efficient interpretation of seismic data in oil and gas exploration and development

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