适用于伊拉克某油田耐温抗盐型阻垢剂性能研究

注水是目前很多油田中后期开发最为广泛应用的方法,注水过程中易结无机垢堵塞注水管线和地层,当地层温度较高或注入水矿化度较高时这种损害更为严重。针对伊拉克某油田储层温度高达120℃,注入水矿化度达到20×104 mg/L,注水结垢现象严重,优选了复合型的耐温抗盐型阻垢剂体系,并对阻垢剂的性能进行了评价。结果表明,在高温高矿化度盐水溶液中,改性多胺缩聚物阻垢剂单体和有机磷酸盐类阻垢剂按1:1比例复配时防垢效果最好,静态和动态防垢率均可以达到90%以上,能够满足目标油田长期注水作业的要求。

Study on the Performance of the Anti-temperature and Salt-resisting Scale Inhibitor for Oil Fields in Iraq

Water injection is the most widely used method for many oilfields during the later period of the development. However, during water injection process, inorganic scale might deposited, making water injection pipeline and formation being plugged. When the formation temperature is high, and salinity of injected water is high, the damage is very serious. In Iraq oilfield, the reservoir temperature is up to 120℃, and the salinity of injected water is up to 200×104 mg/L, scale phenomenon is very serious. Therefore, composite types of temperature resistance and salt inhibitor systems have been selected, and evaluation has been conducted on the performance of scale inhibitors. The results indicated that in the high temperature and high salinity brine solution, the anti fouling effect is best when the ratio of mixture of changed polyamine condensation polymer scale inhibitor agent monomer and organic phosphate antisludging agent is 1:1, and static and dynamic antiscale rate can reached more than 90%, which can meet the requirements for long-term water injection operations in oilfield.