论文部分内容阅读
本工作中使用了４种商品缓蚀剂：Ａ，醛酮胺缩合物；Ｂ，咪唑啉类；Ｃ，吡啶季铵盐类；Ｄ，杂多胺类。缓蚀剂溶于２％ＫＣｌ水溶液中，以２０ＰＶ的量反向流经短岩心（长５—６ｃｍ），然后正向注煤油，测油相渗透率，计算渗透率损害率ηｄ。在６０℃和９０℃时Ｂ由于分散性差，引起的损害最大；在１２０℃时Ａ由于结焦而成为损害最大的缓蚀剂。损害率随温度的变化因缓蚀剂类型而有不同。缓蚀剂浓度增大时造成的损害加大。加入互溶剂使损害减小，特别是Ａ和Ｂ的损害。在２５．４ｃｍ长岩心流动实验中，分段测得的Ｃ在９０℃的ηｄ沿缓蚀剂注入方向逐段减小。
In this work, four kinds of commercial corrosion inhibitors were used: A, aldehyde and ketamine condensates; B, imidazoline; C, pyridine quaternary ammonium salts; D, heteropolyamines. Corrosion inhibitor dissolved in 2% KCl aqueous solution, the reverse flow of 20PV amount of short core (5-6cm long), and then injected kerosene forward, measured oil phase permeability, calculate the permeability damage rate ηd. At 60 ℃ and 90 ℃ B due to poor dispersibility, causing the greatest damage at 120 ℃, A due to coking and become the most damaging corrosion inhibitor. The rate of damage varies with temperature due to the type of inhibitor. Corrosion inhibitor increases the damage caused by increased. Addition of mutual solvents reduces damage, especially A and B. In a 25.4 cm long core flow experiment, the η of the sectionally measured C decreases gradually along the direction of inhibitor injection at 90 ° C.