Geological section output method of three-dimensional geological model

The invention discloses a geological section output method of a three-dimensional geological model. The method comprises the following steps that (1) a stratum is marked, wherein all stratum surfaces of the geological model are subjected to substantiation in three-dimensional modeling software, and the stratum surfaces and a structural surface are marked with different colors; (2) a section is set up, wherein two points on the geological model are clicked, the original location and the length of the section are calculated through the three-dimensional modeling software, and a sectioning auxiliary surface is generated; (3) a chart ratio is made, wherein the distance between the two end points of the sectioning auxiliary surface is calculated through programming, the obtained distance is compared with the actual distance between the two end points of the actual sectioning auxiliary surface to obtain the chart ratio, and a sectioning auxiliary chart is drawn according to the ratio; (4) a coordinate axis is established; (5) drilled hole projection is carried out, wherein drilled holes near the sectioning auxiliary surface are selected and projected to the sectioning auxiliary surface, information of drilled holes on the periphery of the geological model are recognized and reflected on the sectioning auxiliary surface, and projection holes are drawn; (6) a geological section map is output. The geological section output method solves the problem that drawing work efficiency of a traditional flat section is low, and can be widely applied to the field of three-dimensional emulation techniques.