摘要
本文简述了AP型两性聚合物的驱油机理并讨论了其驱油实验结果。在大港西油田条件下 ,两性聚合物AP 12 5驱采收率比水驱提高 2 4.7% ,比高分子量部分水解聚丙烯酰胺驱提高 4.3% 。
Two AP type high molecular weight amphoteric tercopolymers are prepared through aqueous solution copolymerization of acrylamide, a cationic and an anionic monomers in molar ratio 99.0∶0.5∶0.5(AP 81) and successive hydrolysis (AP 125) and are evaluated in laboratory as EOR polymer in comparison with a control polymer, CA(HPAM). The three polymers meet all the requirements to a flooding HAPM. AP 81 and, in particular, AP 125 are much more tolerant to Na, Mg and Ca salts than CA. In a set of core flow experiments at 52℃, an enhancement in oil displacing efficiency of 24.7% is obtained with 1 PV 1 000 mg/L AP 125 solution in fresh water(TDS=1 222 mg/L), that is, by 4.3% higher than that for HPAM(CA) at similar conditions; and of 16.6%—with 1 PV 1 000 mg/L AP 81 solution in brine(TDS=1×10 5 mg/L).
出处
《油田化学》
CAS
CSCD
北大核心
2000年第1期55-57,共3页
Oilfield Chemistry
关键词
丙烯酰胺
驱油剂
高聚物驱油
两性聚合物
AP型
Amphoteric Tercopolymers of Acrylamide
Polymers for EOR
Oil-Displacing Efficiency
Oil-Displacing Mechanisms
