电磁分离技术用于油田油水分离的分析研究

摘要/Abstract

摘要：

电磁油水分离是一种新型环保高效的油水处理技术，在导电性油水处理方面表现出明显的优势，是目前的研究热点之一。基于胜利油田典型联合站采出液实测电导率，理论分析了油田采出液的电磁分离过程，并对不同含油量油田采出液的电磁分离过程进行了数值模拟和仿真分析；在此基础上结合油田生产过程，提出了电磁油水分离技术在油田中的应用方式。结果表明：油田采出液电磁分离具有超重力分离和气浮分离的优势，分离效率高；对含油10⁴~10⁵ mg/L的采出液，电磁分离可实现原油富集；对含油10³ mg/L的采出液，电磁分离可用于回注水处理。电磁油水分离技术为高含水油田采出液处理提供了新思路，对未来油田采出液油水分离新技术的探索具有重要意义。

关键词: 油田采出液, 电磁分离, 超重力分离, 油水混合流

Abstract:

Electromagnetic oil-water separation is a new environmentally friendly and efficient oil-water treatment technology. It has obvious advantages in the treatment of conductive oily sewage，which is one of the current research hotspots. Based on the measured conductivity of produced water from typical combined stations in Shengli Oilfield，the electromagnetic separation process of produced water in oilfields was theoretically analyzed. And the electromagnetic separation process of produced water in oilfields with different oil contents was numerically simulated. On this basis，combined with the oilfield production process，the application mode of electromagnetic oil-water separation in oilfields was put forward. The results showed that electromagnetic separation of oilfield produced water had the advantages of super-gravity separation and air flotation separation，and the separation efficiency was high. When the oil content of produced water was 10⁴-10⁵mg/L，electromagnetic separation could be used for enrichment of crude oil. When the oil content of produced water was 10³ mg/L，electromagnetic separation could be used for the reinjection treatment. Electromagnetic oil-water separation provided a new idea for the disposal of oilfield produced water with high water content. It was of great significance for the exploration of new disposal technologies for oilfield produced water in the future.

Key words: oilfield produced water, electromagnetic separation, hypergravity separation, oil-water mixed flow

中图分类号:

X703.1

安申法, 栾智勇, 王阳, 陈小强, 冯献磊, 彭爱武, 赵凌志. 电磁分离技术用于油田油水分离的分析研究[J]. 工业水处理, 2023, 43(6): 91-98.

Shenfa AN, Zhiyong LUAN, Yang WANG, Xiaoqiang CHEN, Xianlei FENG, Aiwu PENG, Lingzhi ZHAO. Analysis on application of electromagnetic oil-water separation in oilfield[J]. Industrial Water Treatment, 2023, 43(6): 91-98.

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链接本文: https://www.iwt.cn/CN/Y2023/V43/I6/91

图/表 11

图1 电导率随矿化度的变化（26 ℃）

Fig. 1 Electrical conductivity varying with salinity （26 ℃）

图2 油田采出液电磁分离过程

Fig. 2 Electromagnetic separation process of oilfield produced water

图3 电磁分离通道

Fig. 3 Electromagnetic separation channel

表1 电磁分离通道的结构参数

Table 1 Structural parameters of the electromagnetic separation channel

参数	数值
入口段长度L _in/mm	150
有效段长度L/mm	500
有效段长宽比L/b	4.35
有效段长高比L/w	4.35
出口段长度L _out/mm	150

图4 典型平面和直线路径

Fig. 4 Typical planes and straight lines

图5 入口油相体积分数0.1%时P6平面水相静压分布（a）、水相速度矢量分布（b）和油相速度矢量分布（c）

Fig. 5 Static pressure distribution （a），velocity vector distribution of water （b） and velocity vector distribution of oil （c） on P6 when inlet oil volume fraction was 0.1%

图6 入口油相体积分数0.1%时电磁分离通道油相体积分数分布

Fig. 6 Oil volume fraction distribution of electromagnetic separation channel when inlet oil volume fraction was 0.1%

图7 入口油相体积分数0.1%时典型直线路径油相体积分数分布

Fig. 7 Volume fraction distribution of oil along typical straight lines when inlet oil volume fraction was 0.1%

图8 入口油相体积分数5%时P6平面水相静压分布（a）、水相速度矢量分布（b）和油相速度矢量分布（c）

Fig. 8 Static pressure distribution （a），velocity vector distribution of water （b） and velocity vector distribution of oil （c）on P6 when inlet oil volume fraction was 5%

图9 入口油相体积分数5%时电磁分离通道油相体积分数分布

Fig. 9 Volume fraction distribution of oil of electromagnetic separation channel when inlet oil volume fraction was 5%

图10 入口油相体积分数5%时典型直线路径油相体积分数分布

Fig. 10 Volume fraction distribution of oil along typical straight lines when inlet oil volume fraction was 5%

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[1]	陈小强, 赵凌志, 彭爱武. 油水混合流电磁分离装置分离特性的仿真研究[J]. 工业水处理, 2019, 39(10): 89-92.
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