渤南油田群混合原油凝固点变化规律研究

Study on the variation regularity of mixed crude oil freezing point for Bonan oilfields

渤南油田群某油田产黑油和凝析油,二者的凝固点差别较大,直接影响到海底管道管输温度的设计。通过实验研究了不同配比、不同处理温度下黑油和凝析油混合后凝固点的变化规律,并利用实验数据对目前常用的2种混合原油凝固点预测模型进行了评价。模型Ⅱ(b12算法④)适用于渤南油田群混合原油凝固点预测,该模型也适用于其他类似油品混合后凝固点的预测。

The black oil and condensate oil are produced in an oilfield of Bonan oilfields and the freezing points of these two oils are too different to influence the subsea pipelining temperature design directly. This article describes the laboratorial study on freezing point variation regularity of the oil mixed by black oil and condensate oil with different mixing proportions and different processing temperatures, and the experiment data are used to evaluate two freezing point prediction models commonly used for mixed crude oil. Model Ⅱ（method b12 ④） is suitable to predict the mixed crude oil freezing point for Bonan oilfields and other similar cases.