榆树林油田集输、污水系统药剂优选与评价

发布时间：2019-07-06 08:43

【摘要】：油田注水可以补充和保持油层压力,是提高采油效率、稳定油田生产的重要方法。注入水水质达标是该方法的重要基础,而化学药剂是提高注入水水质、保证生产稳定运行的关键。部分油田现场加药制度不合理,化学药剂之间配伍性较差,导致处理后水质不达标。因此,为集输、污水系统选取作用效果优秀、配伍性好的化学药剂,对于科学指导现场加药、提升回注水水质具有重要意义。论文基于榆树林油田集输、污水系统化学药剂的使用情况,对每种化学药剂的类别、优缺点以及应用现状进行研究。选取具有代表性的破乳剂、絮凝剂、助滤剂及杀菌剂进行单剂性能评价,对无机高分子絮凝剂与有机高分子絮凝剂进行配伍性分析。对优选出的各单剂及絮凝剂组合进行加药浓度调整评价,研究作用效果随加药浓度升高的变化。并且对无机高分子絮凝剂与有机高分子絮凝剂进行结构表征,分析无机高分子絮凝剂与有机高分子絮凝剂的协同作用机理。研究结果表明,对于游离水脱除前段与电脱水前段原油乳状液,作用效果最好的两种破乳剂是Ed-17与在用破乳剂。在三种水质情况下,絮凝能力最强的无机絮凝剂是聚铝铁与在用PAC,作用效果最好的有机絮凝剂是PAM02与在用PAM。配伍性最好的絮凝剂组合是在用PAC与在用PAM组合、其次是在用PAC与PAM02组合。无机高分子絮凝剂与有机高分子絮凝剂一同使用时,无机高分子絮凝剂起到压缩双电层、电中和的作用,有机高分子絮凝剂发挥吸附架桥作用,形成的大絮体及金属氢氧化物具有卷扫、网捕作用,进而显著提高了絮凝效果。三氯化铁与硫酸铝是助滤性能最好的助滤剂,随着加药浓度的增加,处理效果均有提升。杀菌效果最好的是杀菌剂2,随着杀菌剂2浓度的增加,细菌数量整体上呈减少趋势。将上述研究结论应用在榆二联合站、东十六污水站现场,处理效果较好,达到了科学指导现场加药,保证回注水水质达标的预期。
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图片说明：全玻璃微孔滤膜过滤器
[Abstract]:Oil field water injection can supplement and maintain reservoir pressure, which is an important method to improve oil production efficiency and stabilize oil field production. The standard of injected water quality is an important basis of this method, and chemicals are the key to improve the quality of injected water and ensure the stable operation of production. The field charge system in some oilfields is unreasonable and the compatibility between chemicals is poor, which leads to the water quality is not up to standard after treatment. Therefore, in order to collect and transport, it is of great significance for the sewage system to select chemicals with excellent effect and good compatibility, which is of great significance for scientifically instructing the field to add drugs and improve the water quality of reinjection. Based on the collection and transportation of Yulin Oilfield and the use of chemicals in sewage system, the types, advantages and disadvantages and application status of each chemical agent are studied in this paper. Representative demulsifier, flocculant, filter aid and fungicide were selected to evaluate the performance of single agent, and the compatibility of inorganic polymer flocculant and organic polymer flocculant was analyzed. The concentration adjustment and evaluation of each single agent and flocculant combination were carried out, and the change of action effect with the increase of dosage concentration was studied. The structure of inorganic polymer flocculant and organic polymer flocculant was characterized, and the synergistic mechanism of inorganic polymer flocculant and organic polymer flocculant was analyzed. The results show that Ed-17 and in-use demulsifiers are the two best demulsifiers for the removal of crude oil emulsion by free water and electric dehydration. Under the condition of three kinds of water quality, the inorganic flocculant with the strongest flocculation ability is the organic flocculant which has the best interaction effect between polyaluminum iron and PAC, in use is PAM02 and PAM. in use. The best flocculant combination is the combination of PAC and PAM, followed by the combination of PAC and PAM02. When inorganic polymer flocculant and organic polymer flocculant are used together, inorganic polymer flocculant plays the role of compression double electric layer and electric neutralization. Organic polymer flocculant plays the role of adsorption bridge, and the formed large flocs and metal hydroxide have the effect of sweeping and net trapping, thus significantly improving the flocculation effect. Iron trichloride and aluminum sulfate are the best filter aids. With the increase of dosage concentration, the treatment effect is improved. The best bactericidal effect was fungicide 2. With the increase of fungicide 2 concentration, the number of bacteria decreased as a whole. The above research conclusions are applied to the site of Yu er United Station and East 16 sewage Station, and the treatment effect is good, which achieves the expectation of scientific guidance of field drug addition and ensuring the water quality of reinjection water to meet the standard.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE39

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