Abstarct: In conventional oil extraction, a large amount of oil remains in the reservoir. Extracting these residual amounts requires enhanced oil recovery(EOR) strategies. One of the standard methods of EOR is the injection of chemicals. The study of the mechanisms of movement of these injections in fractured porous mediums has received less attention. In this experimental study, three porous mediums with single permeability (S), fracture (F), and dual permeability (D) were designed and fabricated using a 3D printer. Four displacing phases of brine water, sodium dodecyl sulfate solution(SDS), silica, and alumina nanofluids, were injected in each of the mediums, and the recovery process was imaged. Then, by using the image processing code, the recovery of each step was calculated. This study shows that in the S medium, the addition of surfactant to the brine water has increased the recovery by about 60%. Also, the addition of silica and alumina nanopowders to the surfactant has increased the recovery up to 70% and 77%. In F, the surfactant solution swept only 26% of the original oil, while the silica and alumina nanofluids recovered 43% and 47%, respectively. The noteworthy point in the injections is that the silica nanofluid had a better result than the alumina nanofluid (24% vs. 19%) at the breakthrough. In the third medium, the injection of surfactant solution, silica, and alumina nanofluids had a recovery rate in the range of 48%, 52%, and 56%, respectively. Then, by analyzing the images of each of the experiments, the behavior of the fingers and the movement of the displacing phase in the oil were studied.