A method and system for constructing a three-dimensional training image of a braided river based on a vector object

By using a vector object-based method, the morphology, location, and spatial matching relationship of braided river mid-shoals and sedimentary layers are accurately depicted, solving the problems of morphological distortion and geological logic conflict in the existing 3D models of braided river reservoirs. This achieves high-precision 3D training image construction and provides highly realistic basic data for oil and gas reservoir modeling.

CN122244378APending Publication Date: 2026-06-19YANGTZE UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANGTZE UNIVERSITY
Filing Date
2026-03-11
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Existing technologies for constructing three-dimensional models of braided river reservoirs suffer from insufficient morphological characterization capabilities, random location distribution, and inconsistencies with geological laws, making it impossible to accurately depict the morphology, location, and spatial matching relationship of the core-siltation layer.

⚗Method used

Using a vector object-based approach, the target midshoal was outlined and sampled by selecting it in the braided river sedimentary facies map. The distribution morphology of the sedimentary layer was characterized by combining actual sedimentary conditions, and differential thickness values ​​were assigned. The 2D spatial matching verification was performed on a 3D geological modeling platform to generate 3D models of the midshoal and sedimentary layer, ensuring their embedded relationship and spatial coupling.

🎯Benefits of technology

It achieves high-precision reproduction of complex braided river sedimentary configurations, and the generated geological model has high fidelity and multi-scenario adaptability, which can provide highly versatile basic data for fine modeling of oil and gas reservoirs.

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Abstract

This invention discloses a method and system for constructing three-dimensional training images of braided rivers based on vector objects. The method includes: selecting target mid-shoals from the sedimentary facies map of braided rivers in the study area and outlining their contours; setting mid-shoal sampling points and obtaining the planar coordinates and distribution width of the mid-shoal sampling points; characterizing the distribution morphology of sedimentary layers within the mid-shoals based on actual conditions; performing regular sampling on the sedimentary layers and storing their coordinates and width parameters; assigning differentiated thickness values ​​to the sampling points based on the actual thickness of the mid-shoals; proportionally adjusting the coordinates and widths of the mid-shoal and sedimentary layer sampling points to the true values; importing the vector parameters and river channel data into a three-dimensional geological modeling platform; constructing a three-dimensional model of the mid-shoals and an embedded model of the sedimentary layers after two-dimensional simulation verification; and generating a three-dimensional training image of the braided river based on the river channel geological data. This invention can achieve high-precision spatial topological constraints on mid-shoals and sedimentary layers, accurately reproduce their sedimentary configurations, and provide highly reliable training image support for reservoir modeling.
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