摘要
随着渤海油田开发的不断深入,采出液含水率逐渐上升,稳油控水提高采收率已经成为海上油田亟待解决的关键问题。井下油水分离技术通过利用井下旋流器实现油水两相井下分离,有效降低了开采成本。该文针对井下旋流器对油水乳状液的破乳及油水分离过程展开深入研究,重点探讨了分离时间、离心转速、工作温度及破乳剂浓度四个关键因素对油水分离效果的影响。研究结果表明,随着分离时间的增加,水相含油量呈现先快速下降后趋于平缓的趋势。提高离心转速、工作温度和破乳剂浓度均能显著降低水相含油量,但当破乳剂浓度超过300 mg/L时,水相含油量反而有所增高。此外,各因素与时间的交互作用未表现出显著性,表明其对含油量的影响主要通过独立作用实现。该研究为优化井下旋流器运行参数、提升油水分离效率提供了重要的理论依据和实践指导,对海上油田高效开发具有重要的应用价值。
With the continuing development of Bohai Oilfield,the increasing water cut in produced fluids has made oil stabilization,water control,and enhanced oil recovery(EOR)a critical issue in offshore oilfields.Downhole oil-water separation(DOWS)technology,which utilizes downhole hydrocyclones for downhole oil-water separation,is a promising solution that effectively reduces overall development costs.This paper conducts an in-depth study on the demulsification and oil-water separation processes of oil-water emulsions by using downhole cyclones,focusing on the influence of four key factors:separation time,centrifugal speed,operating temperature,and demulsifier concentration on the oil-water separation efficiency.The research results show that with the increase of separation time,the oil content in the aqueous phase first decreases rapidly and then tends to be stable.Increasing the centrifugal speed,temperature,and demulsifier concentration significantly reduces the oil content in the aqueous phase.However,when the demulsifier concentration exceeds 300 mg/L,the oil content in the aqueous phase increases instead.Additionally,the interaction between each factor and separation time does not show significance,indicating that their impact on oil content is mainly through independent effects.This study provides important theoretical foundation and practical guidance for optimizing downhole hydrocyclone operating parameters and enhance oil-water separation efficiency,offering significant application value for the efficient advancement of offshore oilfield development.
作者
胡传峰
张京明
郑英滨
四建鑫
王智守
张岩
HU Chuanfeng;ZHANG Jingming;ZHENG Yingbin;SI Jianxin;WANG Zhishou;ZHANG Yan(Tianjin Branch,CNOOC(China)Ltd.,Tianjin 300459,China)
出处
《海洋石油》
2025年第4期51-55,共5页
Offshore Oil
关键词
井下油水分离
水力旋流器
破乳剂
实验研究
方差分析
downhole oil-water separation
hydrocyclone
demulsifier
experimental study
variance analysis
