as most of conventional reservoirs in the world has reached their second stage of life, there has been a tremondous decrease in the the amount of oil they used to produce, therefore engineers are using modern emerging technologies to improve oil production. Most of these methods try to sweep oil from injection wells into prodcution well by increasing the pressure at upstream. In some cases of improved oil recovery, foam is used for both mobility reduction and sweep efficiency improvement but there are major concerns about foam injecion, including stability of foam in reservoir condition and its compability with crude oil. To achieve a successful foam inection is to provide a stable foam and for producing stable foam, proper foaming agents should be seleced. Nanoparticles can help stabilizing foam but they can be uneconomic or harmful to envoiroment. These issues need to be solved before using nanoparticles in industrial scale. In this study sodium dodecylebanzen sulfonate was found a suitable foaming agent and addiction of ZnO nanoparticle helped the stability of the foam. A mixture consisting of 500 ppm surfactant and 300 ppm of nanoparticle had about 160 minutes of half-life. Injection of this foam into micromodel with dead-end pores resulted 98 percent oil recovery while injection of surfactant and gas separately recovered 91 percents and 54 percents of original oil in place. Furthermore, our surfactant was able to alter the wettabilty of glass from mixwet wettability to water-wet wtability Keywords: Enhanced Oil Recovery (EOR), Gas Injection, Foam Stability, Sodium dodecylbenzene sulfonate, Nanoparticle, Dead-end Pores