Enhanced viscosity of the polymer

Recipe experiments show that: in the flooding system by adding alcohols, petroleum sulfonate in reducing losses during flooding, but the formation of the chromatographic separation effect to the loss of oil recovery capacity; lignin as a sacrificial agent in the drive  oil processings  by adding urea? hexametaphosphate salt can enhance the adsorption capacity and reduce losses Na2CO3 and NaOH alkali such as NaOH agents can replace, reduce alkali consumption, enhanced oil recovery; polymer PAA (partially hydrolyzed polyacrylamide) Using the most,  pellet machine  the PAA biological xanthan gum thickener? salt? heat resistance and resistance to shear force capacity is better, but the cost is high, anti-poor biodegradability.