The invention discloses a fractured
tight oil reservoir saturation modeling method. The method comprises the following steps that S100, a well-seismic combined structure
fault model is established; s200, under the constraint of a sedimentary
facies mode, utilizing a single well
facies as hard data in the longitudinal direction and
data analysis according to a variation function on a plane as guidance, applying an SIS random
algorithm to simulate sandstone
facies distribution, and establishing a sandstone-mudstone
spatial distribution model; s300, based on the seismic fusion attribute three-dimensional body and the sandstone three-dimensional model, establishing a fracture phase three-dimensional geologic model; s400, establishing a fault distance-saturation function through a fitting method, and establishing an oil saturation three-dimensional geologic model according to the function; compared with a traditional saturation modeling method, the saturation model established through the method has the advantages that the
control effect of fracture on the oil-water
distribution rule is described more accurately, the
coincidence rate of the saturation model established through the method is 90% compared with that of a real drilled well, a good oil reservoir geologic model is provided for numerical
simulation, and the development effect of an
oil field is improved.