曝气与化学脱硫剂法在油田回注水中的脱硫性能与适用性OA
Desulfurization performance and applicability of aeration and chemical desulfurizers in oilfield re-injection water
中东地区某油田回注水具有高盐、高硫化氢(H2S)的典型特征,易造成管道严重腐蚀,影响注水系统稳定运行,常规水处理工艺难以有效去除溶解态 H2S,因此回注水亟需开展系统性脱硫工艺研究.本研究以模拟中东地区某油田高盐回注水为对象,系统比较了多气体环境下 L80钢的腐蚀行为,评估了曝气工艺与化学脱硫剂的脱硫性能,并考察了其与现场药剂(乙醇胺、咪唑啉类缓蚀剂和亚硫酸钠)的配伍性.研究结果表明,在 H2S、CO2 和 O2 共存条件下,L80钢在高盐回注水中的均匀腐蚀速率达到 0.28 mm·a−1,明显高于单一气体体系.在工艺脱硫性能对比中,曝气工艺虽可在 10 min内去除 90%以上的 H2S,但同时会造成水中溶解氧(DO)升高增加管道被 O2 腐蚀的风险;化学脱硫工艺中沉淀类脱硫剂的 10 min脱硫效率为 61.6%~76.1%,受沉淀稳定性及金属离子累积风险限制,其应用适用性较低;而氧化类脱硫剂表现出更好的去除效果,其中亚硝酸钠(NaNO2)在酸性条件下 10 min即可达到＞99%的去除率,且动力学分析表明其氧化过程更符合二级反应动力学特征.此外,配伍性实验结果表明,NaNO2 与乙醇胺、咪唑啉缓蚀剂和亚硫酸钠具有良好的协同性,在配伍体系中脱硫效率仍能维持在 97%以上.综上,化学脱硫工艺是该中东油田回注水脱硫的最优选择,本研究为中东地区油田回注水脱硫提供了全面的数据支持与理论依据.
The reinjection water in a certain oilfield in the Middle East is characterized by high salinity and high hydrogen sulfide(H2S)content,which can easily cause severe corrosion of pipelines,affecting the stable operation of the reinjection system.Conventional water treatment processes are difficult to effectively remove dissolved H2S,so systematic research on desulfurization processes for re-injection water is urgently required.This study took the high-salinity reinjection water of a certain oilfield in the Middle East as the object,systematically compared the corrosion behavior of L80 steel in a multi-gas environment,evaluated the desulfurization performance of aeration and chemical desulfurization agents,and investigated their compatibility with field agents(monoethanolamine,imidazoline-based corrosion inhibitors,and sodium sulfate).The results showed that under the coexistence of H2S,CO2,and O2,the uniform corrosion rate of L80 steel in high-salinity reinjection water reached 0.28 mm·a−1,which was significantly higher than that in single-gas systems.In the comparison of desulfurization performance,although the aeration process could remove more than 90%of H2S within 10 min,it simultaneously caused an increase in dissolved oxygen(DO)in the water,increasing the risk of O2 corrosion in pipelines.Regarding chemical desulfurization processes,the 10 min desulfurization efficiency of precipitation-type desulfurizers was 61.6%~76.1%,limited by precipitation stability and the risk of metal ion accumulation,In contrast,oxidation-type desulfurizers showed better removal effects,among which sodium nitrite(NaNO2)reached a removal rate of>99%within 10 min under acidic conditions,and kinetic analysis showed that their oxidation process was more consistent with second-order reaction characteristics.Simultaneously,the results of the compatibility studies showed that NaNO2 has good synergy with monoethanolamine,imidazoline-based corrosion inhibitors,and sodium sulfate,and the desulfurization efficiency could still be maintained above 97%in the compatible system.In conclusion,the chemical desulfurization process was the optimal choice for the re-injection water desulfurization of this oilfield in the Middle East,and this study provideds comprehensive data support and a theoretical basis for the desulfurization of oilfield re-injection water in the Middle Eastern region.
张君枝;李佳钰;张艳娜;贾安祺;商瑀辰;王齐;安伟;于建伟
北京建筑大学,北京应对气候变化研究和人才培养基地,北京节能减排与城乡可持续发展省部共建国家协同创新中心,北京 102612北京建筑大学,北京应对气候变化研究和人才培养基地,北京节能减排与城乡可持续发展省部共建国家协同创新中心,北京 102612中国石油勘探开发研究院,北京 100083北京建筑大学,北京应对气候变化研究和人才培养基地,北京节能减排与城乡可持续发展省部共建国家协同创新中心,北京 102612北京建筑大学,北京应对气候变化研究和人才培养基地,北京节能减排与城乡可持续发展省部共建国家协同创新中心,北京 102612中国科学院生态环境研究中心,工业废水无害化与资源化国家工程研究中心,北京 100085||中国科学院大学,北京 100049中国科学院生态环境研究中心,工业废水无害化与资源化国家工程研究中心,北京 100085||中国科学院大学,北京 100049中国科学院生态环境研究中心,工业废水无害化与资源化国家工程研究中心,北京 100085||中国科学院大学,北京 100049
能源科技
油田高盐回注水硫化氢曝气工艺氧化类脱硫剂亚硝酸钠反应动力学化学试剂配伍性
high-salt injection water from oil fieldshydrogen sulfideaeration processoxidative desulfurizersodium nitritereaction kineticschemical agents compatibility
《环境工程学报》 2026 (9)
2844-2852,9
中国石油集团公司重大科技专项资助项目(2023ZZ19)
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