Fluid identification model construction method and device, and fluid identification method and equipment

The invention discloses a fluid identification model construction method and device, and a fluid identification method and equipment, and the method comprises the steps: obtaining a first resistivity at a first position and a second resistivity at a second position in a sample fractured reservoir for the sample fractured reservoir corresponding to different types of original fluids, the original fluid in the sample fractured reservoir is completely displaced at the first position, the original fluid is reserved in the sample fractured reservoir at the second position, calculating the logarithmic dual lateral ratio of the sample fractured reservoir based on the first resistivity and the second resistivity, and calculating the interval transit time and the logarithmic dual lateral ratio of the sample fractured reservoir based on the interval transit time and the logarithmic dual lateral ratio of the sample fractured reservoir. And constructing interval transit time-logarithm dual lateral ratio models of the sam