摘要
热处理技术是改善含蜡原油低温流动性的一种主要方法,以BH油田含蜡原油为例,通过一系列热处理试验对含蜡原油进行了流变性能研究,对实验数据进行了理论分析,并结合现场应用情况验证了试验结论的正确性。分析结果表明:温度是影响热处理效果的主要因素,中温段(50~60℃)的热处理会对含蜡原油的凝点产生恶化效果;高温段(70~95℃)的热处理可以大幅降低含蜡原油的凝点。冷却速度对含蜡原油热处理效果的影响至关重要,当冷却速度较小(0.5~1.0℃/min)时,油样热处理效果较好;冷却速度太快(1.2~1.5℃/min),将使热处理效果变差。剪切速率对热处理效果有一定影响,通常在较低速率的剪切作用下,原油热处理效果较好,随着剪切速率的增加,原油热处理效果变差。热处理后油样的稳定性对热处理效果的影响也不可忽视。
Heat treatment technology is a main method to improve the low temperature flow properties of waxy crude oil. Taking BH waxy crude oil for example, the essay illustrates the researches onto the effect of temperature, cooling rate, shearing rate etc on the theology of waxy crude oils via a range of heat treatment experiments, gives a theoretical analysis of the experimental data, and verifies the correctness of the experimental conclusions combinedwith field application. The analysis shows that temperature is the main factor affecting the heat treatment effect. Heat treatment at medium temperature （50 ℃-60 ℃ ）will produce a deterioration effect on the pour point of waxy crude oil. Heat treatment at high temperature （70 ^（;-95 ^C ）can significantly reduce the pour point of waxy crude oil. The cooling rate plays a crucial role in the heat treatment effect of waxy crude oil. When the cooling rate is low（0.5-1.0 ℃/rain）, the heat treatment effect is better, if the cooling rate is too high（ 1.2- 1.5 ℃/min）, the heat treatment effect becomes poor. The shearing rate also has a certain in- fluence on the heat treatment effect. Usually a relatively low shearing rate generates better heat treatment effect of waxy crude oil, but with the shearing rate increasing, it worsens. Fur- thermore, the stability of oil on the heat treatment effect after the heat treatment can not be ignored.
出处
《石油化工应用》
CAS
2014年第1期74-79,共6页
Petrochemical Industry Application
基金
四川省重点学科建设基金资助项目
项目编号:SZD0416
关键词
含蜡原油
热处理
流变性
waxy crude oil
thermal treatment
rheology
