*2.5.3 Field projects of the alkaline surfactant-polymer flooding*

There are large field trials that already implemented worldwide showing encouraging results. The following table (**Table 3**) shows a summary for the ASP projects or underway since 1980 including the start-up date, oil gravity, Oil viscosity, implementation phase as secondary or tertiary, oil recovered in % of OOIP, and the chemical cost in USD/bbl. In **Figure 3**, the production results after applying the ASP flooding at the end of the water-flooding phase [13].


**Table 3.** *Field cases of ASP EOR.* *Geophysics and Ocean Waves Studies*
