A statistical method for assessment of the existing correlations of hydrate forming conditions

作     者：Javad Sayyad Amin Somayye Nikkhah Mehdi Veiskarami 

作者机构：Department of Chemical Engineering University of GuilanRasht 41996-13769 Iran Department of Civil Engineering University of Guilan Rasht 41996-13769 Iran Department of Civil and Environmental Engineering School of Engineering (No.1) Shiraz University Shiraz 71348-51156 Iran 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2015年第24卷第1期

页      面：93-100页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 082003[工学-油气储运工程] 

主　　题：hydrate formation conditions gas gravity method leverage approach outlier detection 

摘      要：Hydrate formation in the oil and gas industries has been a serious problem for a long time. It may cause many difficulties for instance in gas pipelines blockages. In order to determine the hydrate forming condition, gas gravity method has been used. Several correlations have been proposed based on gas gravity method. Checking the accuracy of the applied correlations is important. In this paper, the leverage approach is used for this purpose. Leverage approach is a statistical method for detection outliers which identifies the applicability domain （AD） of hydrate data predicting correlations and the quality of the existing data. Moreover, the Williams plot is sketched, which is a graphical depiction for determination of the doubtful points. The obtained results showed the existing correlations are all statistically correct and valid to predict hydrate formation temperature, just one data point is out of the applicability domains, and none of the experimental data can be chosen as outliers.