In alkaline-surfactant-polymer flooding processes, the adsorption of residual surfactants in the oil/water interface significantly affected the emulsification and stabilization of produced water. In order to thoroughly investigate the effect of that on oil-water separation efficiencies, the adsorption behaviors of a surfactant, sodium dodecylbenzene sulfonate (SDBS) were carried out by using both molecular simulation and experimental approaches. The effects of temperature on the stability of monolayer SDBS films, and the interfacial film thicknesses and interface formation energies of SDBS at n-dodecane/water interface, were obtained and then compared with the tested values of adsorption heat of the surfactant within the simulated produced water samples and with experimentally-determined interfacial tensions of the samples. The experimental and computational results are consistent in the variation of adsorption heat.

在碱性表面活性剂-聚合物驱过程中，油/水界面中残留的表面活性剂的吸附会显着影响采出水的乳化和稳定性。为了彻底研究其对油水分离效率的影响，通过分子模拟和实验方法对表面活性剂十二烷基苯磺酸钠（SDBS）的吸附行为进行了研究。获得了温度对单层SDBS膜稳定性以及SDBS在正十二烷/水界面的界面膜厚度和界面形成能的影响，然后将其与模拟产物中表面活性剂的吸附热测试值进行比较。水样品，并通过实验确定样品的界面张力。