... – 0.858 Kg/L and increase concentration of foam surfactant from 30% to 90% in the produced water system influences the foaming stability. The microscopic observation shows that bigger bubble size about the average of 400 – 500 µm would slows down the liquid drainage, resulting in foam stability behavior...

... of the reservoir, bringing the industry one step closer to effectively recovering immobile/trapped fluid from brown field reservoirs. van dijke reservoir saturation drainage contact angle relative permeability wettability upstream oil & gas oil saturation displacement oil-wet system al dahli...