The result shows that the rock wettability changes after ASP flooding with a trend to waterwettability. The transforming magnitude relates to the chemical concentration in the ASP system.
Surfactant can lower interfacial tension between oil and water and alter rocky wettability, so it will be used extensively.
表面活性剂能降低油水界面张力,改变岩石的润湿性,所以在三次采油中有着广阔的发展前途。
3
According to the result of XPS, the nanometer polysilicon and the surfactant can adsorb on the rock surface, change its wettability, and enhance the water relative permeability.