Chemical means of equipment protection during oil and gas fields operation

Catalysis and Petrochemistry Pub Date : 2022-01-01 DOI:10.15407/kataliz2022.33.066

O. Ivanenko, T. Shabliy, Yuliia Nosachova, M.M. Kosmyna

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Abstract

In this article the problems associated with the corrosion processes of equipment in oil and gas production are analyzed. The basic anticorrosive methods and means used in modern conditions are considered. Taking into account the mechanism and conditions of corrosion processes in the extraction and transportation of oil-containing products and gas condensate, the chemical method of protection of the equipment was chosen for research. Both known inhibitors based on phosphonic acids and synthesized substances based on sulfonates, imidazolines, and diamines were used as chemicals in the research. As a result of the research, the effectiveness of protection of metals from corrosion depending on the composition of highly mineralized medium, metal type, inhibitor type, and its concentration was evaluated and the effectiveness of the developed scale stabilizer (sodium dimethylsulfonate phosphinate) was evalu- ated in comparison with known reagents. It is shown that the effectiveness of protection of metals from corrosion in aqueous-petroleum mixtures with alkylimidazoline inhibitors (derivatives of 4,5-dihydro-1,3-diazole or 4,5-dihydroimidazole) and inhibitors developed on the basis of sunflower oil and diethylenetriamine (AC-1), ethylenedi-amine (AC-2) reaches 90% in doses of 5 - 50 mg/dm3. In addition, corrosion processes are often accompanied by processes of deposition of hardness salts on the surface of the equipment, which leads to a significant complication in the operation of the equipment. Therefore, studies of the anti-scale properties of these reagents under harsh conditions were performed. Real concomitant gas production waters were used as the medium. It was found that sodium di-methylsulfonate phosphinate is a very effective stabilizer of scale formation and is not inferior in effectiveness to known antiscalants. The proposed reagents can be used to stabilize water-oil mixtures and associated formation waters formed during the production and transportation of oil and gas.

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油气田作业中设备保护的化学手段

分析了油气生产中设备腐蚀过程中存在的问题。考虑了在现代条件下使用的基本防腐方法和手段。考虑到含油产品和凝析油抽运过程中腐蚀的机理和条件，选择了设备的化学保护方法进行研究。研究中使用了已知的膦酸类抑制剂和基于磺酸盐、咪唑啉类和二胺类的合成物质。根据研究结果，对高矿化介质的组成、金属类型、缓蚀剂类型及其浓度等因素对金属的防腐效果进行了评价，并与已知试剂进行了对比，评价了所研制的水垢稳定剂(膦酸二甲基磺酸钠)的有效性。结果表明，在5 ~ 50 mg/dm3的剂量下，烷基咪唑啉抑制剂(4,5-二氢-1,3-二唑或4,5-二氢咪唑的衍生物)和以葵花籽油和二乙基三胺(AC-1)、二乙基胺(AC-2)为基础研制的抑制剂对水-石油混合物中金属的防腐效果可达90%。此外，腐蚀过程往往伴随着设备表面硬度盐沉积的过程，这使得设备的运行变得非常复杂。因此，对这些试剂在恶劣条件下的抗垢性能进行了研究。以实际伴生气水为介质。结果表明，膦酸二甲基磺酸钠是一种非常有效的阻垢剂，其阻垢效果不逊于已知的阻垢剂。所提出的试剂可用于稳定油气生产和运输过程中形成的水-油混合物和伴生地层水。

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Catalysis and Petrochemistry

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