Marine facies sandstone reservoir interlayer distribution prediction method and system

The invention discloses a marine facies sandstone reservoir interlayer distribution prediction method, which comprises the following steps of: dividing marine facies sandstone reservoir interlayers based on geological causes to obtain marine facies sandstone reservoir interlayers of different sedimentary microfacies types; establishing marine facies sandstone reservoir interlayer identification charts of different sedimentary microfacies types; identifying reservoir rhythm characteristics of the marine sandstone reservoir interlayer; and marine facies sandstone reservoir interlayer distribution prediction is carried out through the marine facies sandstone reservoir interlayer identification chart based on reservoir rhythm characteristics. According to the method, on the basis of the type of the interlayer in the marine facies sandstone oil reservoir unit, reservoir rhythm characteristics in different types of interlayers are fused, the development type and the distribution range of the interlayer can be rapid