刘铭辉，李亚辉，杨敏，等.温度、浊度及pH对海上油田水中油荧光特性影响与补偿研究[J]. 河南理工大学学报(自然科学版), doi: 10.16186/j.cnki.1673-9787.2024030074.

LIU M H, LI Y H, YANG M,et al. Influence and compensation of turbidity, temperature and pH on the fluorescence characteristics of offshore oil-in-water[J]. Journal of Henan Polytechnic University(Natural Science), doi: 10.16186/j.cnki.1673-9787.2024030074.

温度、浊度及pH对海上油田水中油荧光特性影响与补偿研究(网络首发)

刘铭辉¹，李亚辉²，杨敏³，王新乐¹，林晨¹，王瀚宇³，冯永康¹，潘子鹤⁴

（1.中海油能源发展股份有限公司 安全环保分公司安全环保工程技术研究院，天津 300457；2.崂山实验室, 山东 青岛 266200；3. 自然资源部 北海海洋技术中心, 山东 青岛 266033；4.山西大学 资源与环境工程研究所，山西 太原 030031）

摘要:目的 为解决海上石油平台生产水中油浓度检测过程中温度变化大、掺杂少量悬浮泥沙、投加药剂带来pH变化等影响水中油荧光特性的问题。方法 以渤海原油为溶质配置的水中油样品为研究对象，使用荧光分光光度计和自研近紫外水中油传感器，基于样品的荧光光谱特性，针对样品溶液的荧光峰及其附近谱线数据进行分析研究，分析温度、浊度和pH变化对水中油荧光光谱的影响，通过建立补偿校正模型，对不同参数变化所造成的干扰进行补偿校正。结果 结果表明：海上石油平台生产水温度、浊度、pH的变化均可影响其荧光强度值，但其荧光峰的位置未发生明显改变，经过数据采集分析得出，荧光强度与温度呈负相关线性关系，拟合系数为0.9835；与浊度呈负相关线性关系，拟合系数为0.9804；与pH呈正相关线性关系，拟合系数为0.9752；通过构建温度、浊度、pH补偿校正模型，计算补偿后荧光强度值与基准真值之间的相对误差，以25℃荧光值为基准，温度补偿模型整体相对误差小于5 %，且在35 ℃前相对误差小于2 %；以0浊度荧光值为基准，浊度补偿模型整体相对误差小于2 %；以平台水样实际水样经验值pH= 6.7为基准，pH补偿模型整体相对误差小于3%。结论 通过各因素补偿模型能够校正环境变化对紫外荧光法检测水中油浓度的影响，有效提高紫外荧光法检测精度。

关键词: 水中油；紫外荧光法；环境因素；影响分析；补偿

中图分类号：X853　　

doi: 10.16186/j.cnki.1673-9787.2024030074.

基金项目: 国家自然科学基金资助项目（22278253）；国家重点研发计划（2022YFC3103900）

收稿日期：2024-06-01

修回日期：2024-07-25

网络首发日期：2024-09-13

Influence and compensation of turbidity, temperature and pH on the fluorescence characteristics of offshore oil-in-water(Online)

LIU Minghui¹, LI Yahui², YANG Min³, WANG Xinle¹, LIN Chen¹, WANG Hanyu³,FENG Yongkang¹,PAN Zihe⁴

(1.CNOOC EnerTech Safety and Environmental Protection Branch R&D Institute, Tianjin 300457;2. Laoshan Laboratory, Qingdao 266200;3.North China Sea Marine Technical Center, Ministry of Natural Resource,Qingdao 266033;4.Institute of Resources and Environmental Engineering,Taiyuan 030031)

Abstract: Objectives In order to solve the problems encountered during the process of measuring oil content  in produced water of offshore oil platforms by using UV fluorescence, such as large temperature changes, mixing of a small amount of suspended sediment, and pH changes caused by the addition of pharmaceuticals.Methods The research target of this study is the oil in water samples using Bohai Sea crude oil as the solute. Fluorescence spectrophotometer and in-house developed near-ultraviolet oil-in-water sensor were applied, based on the fluorescence spectral characteristics of the samples, the fluorescence peaks of the sample solution and its nearby spectral line data were analyzed and investigated to analyze the effects of temperature, turbidity and pH changes on the fluorescence spectra of the oil-in-water, and to compensate for the interferences caused by the changes of the different parameters and to correct for the interferences.Results The results show that the changes of temperature, turbidity and pH of the produced water of the offshore oil platform can affect the fluorescence intensity value, but the position of the fluorescence peak has not shifted significantly. After the analysis of the data collection, the fluorescence intensity is negatively correlated with the temperature, with a fitting coefficient of 0.9835; with the turbidity it is negatively correlated with a fitting coefficient of 0.9804; with the pH it is positively correlated with a fitting coefficient of 0.9752; by constructing the temperature, turbidity and pH compensation model, the relative error between the compensated fluorescence intensity value and the benchmark true value is calculated. By constructing the compensation models for temperature, turbidity and pH, and calculating the relative errors between the compensated fluorescence intensity values and the reference values, the overall relative error of the temperature compensated model is less than 5 % based on the fluorescence value at 25 °C, and less than 2 % up to 35 °C; the overall relative error of the turbidity compensation model is less than 2 % based on the 0 turbidity fluorescence value, and the overall relative error of the pH compensation model is less than 3% based on the actual empirical value of pH=6.7 for the platform water samples.Conclusions The compensation model can correct the influence of environmental changes on the detection of oil concentration in water by UV fluorescence method, and effectively improve the detection accuracy of UV fluorescence method.

Key words：oil-in-water; UV fluorescence; environmental factor; impact analysis; compensation

CLC: X853