Multi-layer heterogeneous oil reservoir stratified gas injection layer series combination optimization method, device and equipment

The invention provides a multilayer heterogeneous oil reservoir stratified gas injection layer series combination optimization method, device and equipment. The method comprises the following steps: determining at least one layer combination group number according to the number of all longitudinal small layers in the multi-layer heterogeneous oil reservoir; all longitudinal small layers in the multi-layer heterogeneous oil reservoir are combined according to the arrangement sequence, and at least one layered gas injection layer series combination division scheme corresponding to each layered combination group number is obtained; according to the average effective thickness, the average porosity, the average oil saturation and the average permeability of each longitudinal small layer in the multi-layer heterogeneous oil reservoir, the comprehensive permeability difference degree of each layered gas injection layer series combination division scheme is obtained through calculation; and taking the stratified gas