动力学型水合物抑制剂适应性分析

Adaptability analysis of kinetic hydrate inhibitor for gas field development

动力学型抑制剂(KHI)通过阻止或延缓晶粒生长来解决天然气集输中水合物堵塞问题,加量少、毒性低是其优点;分析其与现有气田工艺的适应性是大规模使用的前提。选取常用KHI中的PVP、NVC、PVCap、P(VP/VC),从抑制性、流变性、腐蚀性、发泡性分析,并将处理后水质与气田水回注水标准(SY/T 6596-2004)进行比较。结果显示,KHI抑制水合物形成时间超过1100 min,腐蚀性与现有甲醇体系一致,发泡率小于6.0%,粘度满足现有注水设备要求,处理后水质各项指标满足SY/T 6596—2004要求。

Kinetic hydrate inhibitor(KHI)can solve hydrate blocking pipeline by means of preventing or postponing crystal particle growth.The advantage is smaller doses and lower toxicity.Adaptability analysis of KHI in gas field is the precondition of wide-scale usage.PVP,NVC,PVCap,and P(VP/VC)as are tested from inhibiting ability,rheological property,corrosivity,and foaming ability.The treated sewage is alsOcompare with recommended practice for produced-water reinjection(SY/T 6596—2004).The results show that inhibition time of KHI is more than 1100 min and corrosion rate keeps pace with that methanol.Moreover,foaming ratiOof KHI solution is lower 6.0%and the viscosity meets the requirement of reinjection equipment.The treated water alsOmeets the demand of National Standard(SY/T 6596—2004).