The invention provides an
oil well reverse displacement synergistic transformation injection parameter and fracture parameter optimization method, and belongs to the technical field of oil reservoir yield increase, and the method comprises the following steps: 1, selecting a low-yield and low-efficiency
oil well in an oil reservoir target area; 2, determining a reasonable formation pressure maintaining level in combination with formation conditions; step 3, determining the injection amount of the synergistic flooding oil by applying the result of the step 2; step 4, optimizing the concentration of a surfactant in the synergistic
oil displacement liquid; 5, determining the soaking time of the
oil well; and 6, determining crack parameters of the low-
viscosity synergistic
oil displacement transformation stage and the
guanidine gum sand-carrying fracturing transformation stage, wherein the crack parameters comprise the crack supporting height, the crack half length and the crack flow
conductivity. The method can be widely applied to oil well reverse displacement synergistic transformation
process design, and by means of design optimization of synergistic displacement oil injection parameters and fracture parameters, the formation pressure can be effectively increased, the reservoir seepage condition can be improved, the
oil displacement efficiency can be improved, and the single well yield and
recovery efficiency after transformation can be improved.