摘要
渤海地区某油田FPSO运行多年,但是两级生产分离器水堰管最佳拔高一直没有确定,经常调整水堰管高度使分离器内油水界面过高或过低而导致油相出口原油含水过高或水相出口水质不合格。此文系统地阐述了水堰管控制油水界面的原理,推算出两级三相分离器水堰管拔高与油水界面高度关系。通过分析船体倾斜、化学药剂效果、分离器内部积砂、油和水密度等影响这两级三相分离器油水界面的因素,结合油田实际生产情况,计算油相和水相的最佳停留时间及对应的有效容积和油水界面高度,从而反推出水堰管最佳拔高。FPSO生产人员根据推算结果调整分离器水堰管拔高,实地验证了计算结果的准确性。
The FPSO has been operating for many years in an oilfield in Bohai Sea area,but the optimal height of the water weir pipe of the two-stage production separator has not been ascertained.The height of the water weir pipe is often adjusted to make the oilwater interface in the separator too high or too low,resulting in high water content in crude oil at the oil phase outlet or substandard water quality at the water phase outlet.In this paper,the principle of water weir pipe controlling oil-water interface is elaborated,and the relationship between water weir pipe height of two-stage&three-phase separator and oil-water interface height is calculated.Based on the analysis of the factors affecting the oil-water interface of the two-stage three-phase separator,such as the obliquity of FPSO,the effect of chemical agents,the sand accumulation in the separator,the density of oil and water,etc.,and combined with the actual production condition of this oilfield,the optimal residence time,the corresponding effective volume and the height of the oilwater interface of the oil and water phases are calculated,which can be used to deduce the optimal height of the water weir pipe.FPSO production operators adjust the height of separator water weir pipe according to the calculation results and verify the accuracy of the calculation results.
作者
梁煜奇
侯嘉民
吕涛
LIANG Yuqi;HOU Jiamin;LYU Tao(Caofeidian Operation Company of CNOOC(China)Co.,Ltd.,Tianjin 300450,China)
出处
《海洋石油》
CAS
2021年第1期101-104,共4页
Offshore Oil
关键词
水堰管
油水界面
停留时间
生产情况
化学药剂
water weir pipe
oil-water interface
residence time
production condition
chemical agent
