In this paper, firstly the effect of nano materials on surfactant adsorption and then, the effect of surfactant injection associate with nano particles on the enhanced oil recovery is studied. For this, several series of laboratory tests under the temperature and pressure of 50°F and 2500 Psia is performed. The core which is used in this test is related to one of the Iranian sandstone reservoirs and the used surfactant in this system is anion sodium dodecyl sulfate surfactant. One of the main elements of success or failure in enhanced oil recovery with surfactant is the amount of the surfactant lost during the operation. With evaluation and development of nanotechnology, the scientist discovered that, adding the nano materials to surfactant materials can cause a high efficiency of them, for instance, a high resistivity against high temperature and their stability. Results show adding the water wet nano particles leads to a reduction in surfactant adsorption amount on the rock. It is also proved that, with increasing the nano particles concentration amount, this amount of surfactant adsorption on the rock will reduced in a higher amount and this reduction in adsorption amount will have a direct effect on oil recovery factor.
Keyword: Surfactant, nano particles, enhanced oil recovery, adsorption