油气田H<sub>2</sub>S腐蚀体系模拟方法探究

doi:10.11902/1005.4537.2014.033

中国腐蚀与防护学报

2015, Vol. 35

Issue (3): 251-256 DOI: 10.11902/1005.4537.2014.033

研究报告

本期目录 | 过刊浏览

油气田H₂S腐蚀体系模拟方法探究

王凤平(

),刘岚,丁言伟,胡隋军,刘照斌,刘丹,张丽

Simulation of Carbon Steel Corrosion in Oil-gas Field Produced Waters Containing Hydrogen Sulfide

Fengping WANG(

),Lan LIU,Yanwei DING,Suijun HU,Zhaobin LIU,Dan LIU,Li ZHANG

Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China

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摘要:

通过两种方法向反应釜内引入H₂S气体模拟含H₂S油气田腐蚀体系：一是使用钢瓶直接通入H₂S,二是通过化学反应间接生成H₂S。在高压釜内研究了20#钢在这两种不同方法引入H₂S体系中腐蚀情况的差异。通过失重法和电化学法研究了两种方法下20#钢的腐蚀速率及腐蚀机理；通过SEM观察腐蚀形貌；并利用EDS分析腐蚀产物的组成。结果表明：20#钢在由化学反应产生H₂S模拟油气田环境中的腐蚀速率为0.1077 mm/a,腐蚀产物膜粗糙、疏松。而其在直接导入H₂S模拟油气田环境中的腐蚀速率为0.0518 mm/a,腐蚀产物膜均匀、致密、平整,接近现场实际情况。即H₂S的导入方法对油气田模拟腐蚀体系的建立有重要的影响。从科学研究角度看,直接通入H₂S法能更好地模拟含H₂S油气田腐蚀体系。

关键词 ：油气田, H₂S腐蚀, 模拟实验方法, 20#钢

Abstract：

In order to simulate the carbon steel corrosion in oil-gas field produced water containing H₂S, a proper artificial water was poured into an autoclave and then into which H₂S gas was introduced respectively in two different ways: directly inducing H₂S from a pressed H₂S gas cylinder and generating H₂S gas in-situ during the corrosion process through chemical reaction of desired reagents pre-set in the water. The corrosion rates of 20# steel were comparatively studied for two different ways of introducing H₂S gas, while the other parameters kept the same, by weight loss technique, electrochemical measurement and scanning electron microscopy with energy dispersive spectrometer. It has been found that the 20# steel in the water with in-situ generating H₂S exhibits a corrosion rate 0.1077 mm/a and a coarse and porous corrosion product film. Whereas, those by inducing H₂S from gas cylinder are a corrosion rate 0.0518 mm/a and a uniform and compact corrosion product film respectively. It is also noted that the results of the former one are better accorded with those observed in oil/gas fields practice. Therefore, the way of directly inducing H₂S from gas cylinder into the waters should be suitable to simulate the relevant corrosion performance of metallic materials in oil-gas field produced waters.

Key words： oil/gas field H₂S corrosion experimental method 20# steel

基金资助:辽宁省高校创新团队项目 (LT20100055) 资助

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引用本文:

王凤平,刘岚,丁言伟,胡隋军,刘照斌,刘丹,张丽. 油气田H₂S腐蚀体系模拟方法探究[J]. 中国腐蚀与防护学报, 2015, 35(3): 251-256.
Fengping WANG, Lan LIU, Yanwei DING, Suijun HU, Zhaobin LIU, Dan LIU, Li ZHANG. Simulation of Carbon Steel Corrosion in Oil-gas Field Produced Waters Containing Hydrogen Sulfide. Journal of Chinese Society for Corrosion and protection, 2015, 35(3): 251-256.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2014.033 或 https://www.jcscp.org/CN/Y2015/V35/I3/251

图1 反应釜内动电位法测试20#钢腐蚀速率装置示意图

表1 20#钢在两种不同模拟含H2S油气田腐蚀体系中的腐蚀速率

图2 在不同方法模拟含H2S油气田腐蚀体系中20#钢的极化曲线

表2 20#钢在两种不同模拟方法中的电化学参数

图3 20#钢在两种不同方法模拟含H2S介质中腐蚀后的产物膜SEM像

图4 20#钢在两种不同方法引入H2S的介质中腐蚀后产物膜的EDS分析

表3 20#钢在两种不同模拟含H2S方法的腐蚀介质中腐蚀产物膜的元素组成

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