Chemical composition of pipe steel corrosion products in gas condensate

IF 0.8 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metallurgist Pub Date : 2025-07-15 DOI:10.1007/s11015-025-01974-9

A. S. Guzenkova, I. V. Artamonova, S. A. Guzenkov, S. S. Ivanov

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Abstract

The composition of corrosion products and solid deposits in the form of conical protrusions in the vicinity of a through-hole discovered during the repair of a gas condensate well after 256 days of operation in the Dengizkul field (Uzbekistan) was investigated. The area of corrosive destruction was located 5–8 cm from the perimeter of the through hole and extended in the direction of gas condensate flow. The quantitative distribution of nine chemical elements in corrosion products and solid deposits was determined. These deposits contain all the alloying and impurity elements of the pipe steel, as well as chlorine originating from gas condensate, hydrochloric acid used for well treatment, and water. In addition to iron, the highest concentration of sulfur in the corrosion products is observed, ranging from 19.29 to 33.85 wt %, indicating that iron is predominantly present in the form of sulfides. The concentration of the remaining alloying and impurity elements is generally less than 1%, but in samples from certain areas it reaches up to 2.23 wt %. The concentrations of chlorine, calcium, and silicon in solid deposits from gas condensate-containing fluids exceed their levels in corrosion products. These elements are present in concentrations greater than 1%. The research findings may prove useful in understanding the mechanism of pipe steel degradation and in optimizing acid treatment processes during well operations.

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管道钢在冷凝水中腐蚀产物的化学成分

在乌兹别克斯坦Dengizkul油田，作业256天后，在对凝析气井进行维修时，发现了通孔附近的腐蚀产物和锥形突出物形式的固体沉积物的组成。腐蚀破坏区域位于距通孔周长5 ~ 8 cm处，沿凝析气流动方向延伸。测定了腐蚀产物和固体沉积物中9种化学元素的定量分布。这些沉积物含有所有的合金和管道钢的杂质元素，以及来自凝析气的氯、用于井处理的盐酸和水。除铁外，腐蚀产物中硫的浓度最高，为19.29 ~ 33.85 wt %，表明铁主要以硫化物形式存在。残余合金元素和杂质元素的浓度一般小于1%，但在某些地区的样品中可达2.23 wt %。含气体冷凝液的固体沉积物中氯、钙和硅的浓度超过了它们在腐蚀产物中的含量。这些元素的浓度大于1%。研究结果可能有助于理解管钢降解机理，并在井作业中优化酸处理工艺。

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来源期刊

Metallurgist 工程技术-冶金工程

CiteScore

1.50

自引率

44.40%

发文量

151

审稿时长

4-8 weeks

期刊介绍： Metallurgist is the leading Russian journal in metallurgy. Publication started in 1956. Basic topics covered include: State of the art and development of enterprises in ferrous and nonferrous metallurgy and mining; Metallurgy of ferrous, nonferrous, rare, and precious metals; Metallurgical equipment; Automation and control; Protection of labor; Protection of the environment; Resources and energy saving; Quality and certification; History of metallurgy; Inventions (patents).