Method and apparatus for establishing fault model based on spatial fault polygon

Abstract

The invention discloses a method and an apparatus for establishing a fault model based on a spatial fault polygon. The method comprises: reading a structural contour map and fault polygon data; determining the type of the fault polygon according to the fault polygon data; separating the fault polygon into a hanging wall fault line and a footwall fault line according to the type; calculating coordinates of an intersection point between the hanging wall fault line and a contour line and an intersection point between the footwall fault line and the contour line, and obtaining three-dimensional intersection point coordinates by taking a corresponding elevation value of the contour line as a z value of the intersection point; calculating an elevation value of each vertex of the fault polygon by utilizing the three-dimensional intersection point coordinates to obtain three-dimensional coordinates of each vertex; for each fault line, performing neighbor smoothing filtering on the evaluation values of the vertex and the intersection point on the fault line to obtain spatial trajectory coordinates of the fault polygon; correcting the spatial trajectory coordinates to obtain coordinate data; and performing fault modeling according to the coordinate data. The three-dimensional data of the fault polygon is obtained quickly and accurately, and an accurate model is established, so that the workload of later correction is reduced.

Description

technical field [0001] The invention relates to the field of reservoir description, in particular to a method and device for establishing a fault model based on spatial fault polygons. Background technique [0002] 3D geological modeling technology plays an extremely important role in the exploration and development of oil and gas fields and fine description of oil and gas reservoirs. The establishment of 3D geological models is an important means in the fields of earth science and oil and gas field development, and the establishment of fault models is extremely important. one ring. [0003] There are many methods for fault modeling in actual work. At present, the mainstream method of fault modeling is to rely on commercial software in the depth domain, such as RMS (Reservoir Modeling Software), Petrel or other similar modeling software. According to the original data used in fault modeling, there are mainly the following methods: [0004] (1) Carry out fault modeling afte...

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Problems solved by technology

[0011] The present invention provides a method and device for establishing a fault model based on spatial fault polygons, so as to at least solve the fault modeling method in the prior art. In the process of fault modeling, manual intervention and modification require a large workload and time-consuming problems.

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