两性聚合物是由阴离子单体、阳离子单体和(或)非离子单体合成的一种二元或三元共聚物。由于分子链上含阳离子基团,因此能使聚合物牢固吸附于带负电荷的地层岩石上,其阴离子、非离子基团与水形成强氢键,所以能阻碍水之流(低)动,大大降低水的渗透率;油流通过时聚合物分子收缩,卷曲在孔隙壁上,故对油的流动阻力很小,因而作为油水比控制剂而被广泛应用。 Amphoteric polymers are binary or ternary copolymers synthesized from anionic, cationic and / or nonionic monomers. Because of the cationic groups in the molecular chain, the polymer can firmly adsorb on the negatively charged stratigraphic rocks, and the anionic and nonionic groups form strong hydrogen bonds with water, which can hinder the flow of water (low) Greatly reducing the permeability of water; when the oil flow through the polymer molecules shrink, curled in the pore wall, so the resistance to flow of oil is small, so as oil and water than the control agent is widely used.