Preparation method of simulated oil reservoir pore passage

The invention relates to a preparation method of a simulated oil reservoir pore passage. The preparation method of the simulated oil reservoir pore passage comprises the following steps: step one, processing a core casting sheet graph of a target oil reservoir to obtain a binary graph; step two, performing pore segmentation on the binary graph, and performing calculation according to an equivalentcircle method to obtain the diameter of each pore; step three, extracting a classification binaryzation graph reflecting different pore types from the binary graph; and step four, taking the averagepore diameters corresponding to different pore types as engraving depths, and sequentially engraving the substrate according to the binary graphs corresponding to different pore types. According to the preparation method of the simulated oil reservoir pore passage provided by the invention, the obtained simulated oil reservoir pore passage reflects planar distribution of pores in a rock core in the horizontal direction and