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在稠油的开采、管输等过程中,动力黏度是一个重要的参数,目前对稠油黏度的估计常采用稠油黏度预测公式进行。然而,由于现有的黏度预测关系式大多基于区域性稠油数据,因此,这些关系式只对特定区域特定组分的稠油才有很高的预测精度。该文采用Hakke RS6000旋转流变仪对中海油采油技术服务公司和渤海油田绥中陆地处理终端的共计3种稠油的动力黏度进行了测量。稠油30oC的黏度范围为:241 mPa·s–5 239 mPa·s,测量温度范围为:20oC–70oC。将Beal、Hossain等和张春明等共计11个黏度预测关系式与该文实验数据进行了对比分析。研究表明,在所研究的关系式中,张春明和Hossain关系式具有最高的预测精度,而Alomair关系式的预测精度最差。同时,结合国内多个学者以及该文的实验数据,推出了一个新的黏度预测关系式。该关系式是温度T和50oC的黏度50μ的函数。它由国内多个区块的稠油黏度数据得来,因此能更好地预测国内稠油的黏度。
Dynamic viscosity is an important parameter in the process of heavy oil production and pipeline transportation. At present, the estimation of the viscosity of heavy oil often adopts the viscosity prediction formula of heavy oil. However, since the existing viscosity prediction relationships are mostly based on regional heavy oil data, these relationships have high predictive accuracy only for heavy oil in specific components of a particular area. In this paper, the kinematic viscosity of a total of three kinds of heavy oil of CNOOC Oilfield Technical Service Company and Sui Zhong Land Processing Terminal of Bohai Oilfield was measured by Hakke RS6000 rotary rheometer. Viscosity of heavy oil at 30oC range: 241 mPa · s-5 239 mPa · s, measuring temperature range: 20oC-70oC. A total of 11 viscosity prediction equations such as Beal, Hossain and Zhang Chunming were compared with the experimental data. The research shows that in the relations studied, the relationship between Zhang Chunming and Hossain has the highest prediction accuracy, while the Alomair relation has the worst prediction accuracy. At the same time, combining a number of domestic scholars and the experimental data of the paper, a new viscosity prediction equation is introduced. The relationship is a function of the temperature T and the viscosity 50 μ at 50 ° C. It is derived from the viscosity data of heavy oil in several blocks in China, so it can better predict the viscosity of domestic heavy oil.