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

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.