基于差示扫描量热法的防蜡剂筛选

Screening of Wax Inhibitor Based on Differential Scanning Calorimetry

郭秩瑛 王传军 代冬冬 刘明慧 黄雷 李彪

GUO Zhiying WANG Chuanjun DAI Dongdong LIU Minghui HUANG Lei LI Biao

中海石油(中国)有限公司天津分公司, 天津 300459; 西南石油大学, 成都 610500

Tianjin Branch of CNOOC Ltd., Tianjin 300459, China; Southwest Petroleum University, Chengdu 610500, China

为了快速筛选评价出适合于J油田井筒的防蜡剂配方，利用差示扫描量热法（DSC）测定原油析蜡过程具有油样少、测试快、精度高的特点，对J油田B26井油样加剂前后析蜡参数进行分析。规范SY/T 0545-2012中采用的5℃/min降温速率并不适合文中所研究的油样，通过对比不同降温速率下的析蜡量与由SY/T 7550-2012所获得的含蜡量得出该油样最适宜的降温速率为13℃/min，以优选出的降温速率对B26井油样分别加入三种防蜡剂前后进行DSC析蜡参数测试。结果表明：DSC法可做为一种防蜡剂的快速筛选评价方法，筛选出的防蜡剂OGD6002效果最好，防蜡率达到66.3%。

In order to quickly screen and evaluate the formulation of wax inhibitor suitable for the wellbore of J oilfield, differential scanning calorimetry (DSC) was used to determine the wax precipitation process of crude oil, which has the characteristics of less oil samples, fast test and high precision. The wax precipitation parameters of B26 Well in J oilfield with and without the additive were analyzed, and writers found that the 5℃/min cooling rate referring to the standard of SY/T 0545-2012 is not suitable for the research sample. Through the comparative analysis of different cooling rate of wax and wax content obtained by the SY/T 7550-2012 standard, writers found that the most appropriate cooling rate for the sample is 13℃/min. According to that, the DSC parameters test was conducted before and after adding three kinds of paraffin inhibitor to the oil samples of B26 Well. The results show that DSC method can be used as a rapid screening and evaluation method for wax-preventing agent, and the selected wax-preventing agent OGD6002 has the best effect with the wax-preventing rate reaching 66. 3%.

https://doi.org/10.3969/j.issn.1008-2336.2019.04.028