It has an irreplaceable role in the oil recovery process in tertiary oil recovery. As a drilling fluid, it has the following effects:

1) Good water solubility

PAM is readily soluble in water, mostly in the form of an aqueous solution, which forms a hydrogen bond between the water molecules and the polar side groups of the PAM and is soluble in water at various percentages.

2) Rheology

Rheology is the characteristic of flow deformation of an object under the action of external force. From the apparent viscosity and shear force, the apparent viscosity of PAM decreases when the shear force increases, but when the shear force is removed, As time increases, the apparent viscosity gradually recovers.

3) Increased viscosity

Viscosity is the effect of PAM on the apparent viscosity of an aqueous solution or an aqueous dispersion. A increases the viscosity of the aqueous phase by its own viscosity. BPAM interacts with the dispersed phase or compound in water, which is much higher than that of the polymer. The viscosity-increasing effect of its own viscosity.

4) Dispersibility

PAM contains a hydrophilic group, as well as a skeleton, the surface has a certain activity, which can reduce the tension of the water surface to a certain extent, help the water to wet the solid, and make the water---colloid complex adsorbed on the colloidal particles. The outer shell is formed to prevent flocculation caused by the electrolyte, and the dispersion system is stabilized.

5) Flocculation

The polar groups in the PAM can adsorb suspended matter in the water, forming a bridge between the ions to form a larger agglomerate.