三元采出液电脱水器过渡层处理技术研究

Research on the Transition Layer Treatment Technology of Ternary Produced Liquid Electric Dehydrator

受三元采出液机械杂质含量高、油水乳化严重、稳定性增强影响,油水界面之间形成稳定过渡层,其具有高导电率的特点,造成原油脱水设备处理效率下降,电脱水器平稳运行困难。为提升脱水系统稳定性,重点攻关复合驱中间层的处理方法,明确过渡层的形成及稳定机理,创新研发了过渡层高效抑制药剂,从源头减少电脱水器内过渡层的富集,保障电脱水器平稳运行。同时,电脱水器放水得到明显改善,有效降低了下游污水站的处理难度。此外,为实现过渡层内油、水、固三相分离,完全从系统内剥离,形成了“消融沉降、提温离心”的减量化处理技术,经处理后油中含水率低于0.3%,可满足外掺条件。通过实施过渡层专项处理技术,有力保障了脱水系统平稳运行及外输原油保质保量。

Due to the high content of mechanical impurities in the ternary produced liquid,severe emulsification of oil and water,and enhanced stability,a stable transition layer is formed between the oil and water interfaces,which has the characteristic of high conductivity,resulting in a decrease in the processing efficiency of crude oil dehydration equipment and difficulties in the smooth operation of the electric dehydrator.In order to improve the stability of the dehydration system,the treatment methods of the intermediate layer in composite flooding are focused,the formation and stability mechanism of the transition layer is clarified,efficient inhibitors for the transition layer are innovatively developed.The enrichment of the transition layer in the electric dehydrator is reduced from the source to ensure the smooth operation of the electric dehydrator.At the same time,the water discharge problem of the electric dehydrator is significantly improved,the treatment difficulty of downstream sewage stations is effectively reduced.In addition,in order to achieve three-phase separation of oil,water,and solid in the transition layer,and completely stripped from the system,a reduction treatment technology of"ablation sedimentation,temperature increase centrifugation"has been formed.After treatment,the water content in the oil is less than 0.3%,which can meet the requirements for external blending.By implementing special treatment technology for transition layers,the smooth operation of the dehydration system is effectively ensured,and the quality and quantity of exported crude oil are guaranteed.