Mixture temperature prediction of waxy oil–water two-phase system flowing near wax appearance temperature

作     者：Ali Piroozian Muhammad A. Manan Issham Ismail Rahmat Mohsin Ali Esfandyari Bayat Mac DarlingtonUche Onuoha Mahmoud Hemmati 

作者机构：Department of Petroleum Engineering Faculty of Petroleum and Renewable Energy Engineering Universiti Teknologi Malaysia Johor 81310 Malaysia Malaysia Petroleum Resources Corporation (UTM-MPRC) Institute for Oil and Gas Universiti Teknologi MalaysiaJohor 81310 Malaysia ffshore Oil and Gas Research Center College of Mechanical and Oil/Gas Transportation Engineering China University of Petroleum Beijing 102249 China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2016年第24卷第6期

页      面：795-802页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Supported by the Malaysia's Ministry of Higher Education(FRGS/4F136) the University Teknologi Malaysia(RUG/01H68) 

主　　题：Mixture temperature predictionAnalytical modelWaxy oil water two phase flowWax appearance temperature 

摘      要：Temperature sensitivity of waxy crude oils makes it difficult to study their flow behaviour in the presence of water especially near their wax appearance temperature （WAT）. In this study a method was proposed and implemented to mitigate such difficulties which was applied in predicting mixture temperatures （Tin） of a typical Malaysian waxy crude oil and water flow in a horizontal pipe. To this end, two analytical models were derived firstly from calorimetry equation which based on developed two correlations for defining crude oil heat capacity actualized from the existed specific heat capacities of crude oils. The models were then applied for a set of experiments to reach the defined three predetermined Tm （26 ℃, 28 ℃ and 30 ℃）. The comparison between the predicted mixture temperatures （Tin,1 and Tin,2） from the two models and the experimental results displayed acceptable absolute average errors （0.80% 0.62%, 0.53% for model 1; 0,74%, 0.54%, 0.52% for model 2）. Moreover, the average errors for both models are in the range of standard error limits （4-0,75Z） according to ASTM E230. Conclusively, the proposed model showed the ease of obtaining mixture temperatures close to WAT as predetermined with accuracy of ± 0.5 ℃approximately for over 84% of the examined cases. The method is seen as a practical reference point to further study the flow behaviour of waxy crudes in oil-water two-phase flow system near sensitive temperatures.