Diverted river system reservoir modeling method based on biased random walk

The invention relates to the field of oil and gas reservoir modeling, in particular to a diversion river system reservoir modeling method based on biased random walk, which comprises the following steps: establishing a well location distribution diagram based on elevation tolerance; establishing an electrostatic field-like map by simulating the characteristics of an electrostatic field and taking each well point as a charge source point; biased random walk simulation is carried out in the static-like field map according to the attraction or repulsion intensity; and establishing a diversion river system reservoir model based on a simulation result. According to the method, a new method is provided for reservoir modeling of the split-flow channel system, the problem that the simulated channel mistakenly penetrates through a non-channel well is avoided, uncertainty is reflected in a probability migration mode, representation precision and efficiency can be effectively improved, and important support is provided