精细石油化工

以丙烯酰胺和二甲基二烯丙基氯化铵为共聚为单体，合成了一种阳离子聚合物CP-1，并与聚丙烯酰胺类纳米微球（中值粒径小于500 nm）形成复合溶液型选择控水体系NSBA，考察了NSBA在储层孔喉中的选择控水性能。结果表明：经NSBA处理后岩心薄片水相接触角为31.13°，润湿性由亲油性转向亲水性；水相渗透率封堵率大于90%，油相渗透率封堵率低于75%，水相残余阻力系数可达12.89倍，且体系适用储层的渗透率范围为800～15 00 mD。

A cationic polymer CP-1 was synthesized by copolymerization of acrylamide and dimethyl diallyl ammonium chloride as monomers, and combined with polyacrylamide nanospheres(with a median particle size of less than 500 nm) to form a composite solution-type selective water control system NSBA. The selective water control performance of NSBA in reservoir pore throats was investigated. The results showed that after NSBA treatment, the water phase contact angle of the core slice was 31.13°, and the wettability changed from lipophilic to hydrophilic. The water phase permeability plugging rate was greater than 90%, while the oil phase permeability plugging rate was less than 75%. The residual resistance factor for the water phase reached 12.89 times, and the applicable permeability range of the system in reservoirs was 800-1 500 mD.