关于海上油田油水界面测量情况的探讨  

Discussion on the Measurement of Oil-water Interface in Offshore Oilfields

作　　者：张浩 高伟 鲁大勇 詹蕊菱 张勇 李德伦 王永恒 ZHANG Hao;GAO Wei;LU Dayong;ZHAN Ruiling;ZHANG Yong;LI Delun;WANG Yongheng(Weizhou Operation Company of Zhanjiang Branch,CNOOC(China);Northwest Sichuan Gas Mine of Southwest Oil&Gas Field Company,CNPC)

机构地区：[1]中海石油(中国)有限公司湛江分公司涠洲作业公司 [2]中国石油天然气股份有限公司西南油气田公司川西北气矿

出　　处：《油气田地面工程》2024年第2期9-15,共7页Oil-Gas Field Surface Engineering

基　　金：中海石油(中国)有限公司科技项目“南海西部油田上产2000×104 m3关键技术研究项目”(CNOOC-KJ 135 ZDXM 38 ZJ 01 ZJ)。

摘　　要：随着海上油田产液量的日益增高,原油处理流程脱水效果的好坏将直接影响到外输原油的品质以及下游回注生产水的水质。为了保证原油在处理流程中达到良好的脱水效果,需要对处理流程中三相分离器及电脱水器的油水界面进行准确测量。通过对三相分离器运行效果及油水界面测量情况分析,电脱水器运行效果及油水界面测量情况分析,提出了一种油水界面测量的改进方法。经油田现场实际应用一年的结果验证,油水界面测量方法调整后能够准确测量出油水界面,油水处理效果改善明显,电脱水器运行电流明显降低,水相出口含油率由250 mg/L下降至120 mg/L;改进后系统稳定性得到提高,上游来液波动影响明显降低,提高了生产效率,降低了生产成本。With the increasing amount of liquid produced in offshore oilfields,the dewatering effect of crude oil treatment process will directly affect the quality of crude oil exported,and the quality of production water reinjected downstream.In order to ensure the good dewatering effect of crude oil in the treatment process,it is necessary to accurately measure the oil-water interface of the three-phase separator and electric dehydrator in the treatment process.An improved method of oil-water interface measurement is proposed by analyzing the operation effect of the three-phase separator and the measurement of its oil-water interface,as well as the operation effect of the electric dehydrator and the measurement of its oil-water interface.After one year of field application,the oil-water interface can be accurately measured after the adjustment of the oil-water interface measurement method,the oil-water treatment effect is obviously improved,the operating current of the electric dehydrator is noticeably reduced,and the oil content at the water phase outlet decreases from 250 mg/L to 120 mg/L.The stability of the system is improved,the influence of the fluctuation of the upstream fluid is remarkably reduced,the production efficiency is improved,and the production cost is reduced.

关 键 词：油水界面 三相分离器 电脱水器 射频导纳 原油脱水 

分 类 号：TE624.1[石油与天然气工程—油气加工工程]