Experimental Study on Mechanical Properties Degradation of TP110TS Tube Steel in High H_2S Corrosive Environment

Deli Gao; Zengxin Zhao

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Experimental Study on Mechanical Properties Degradation of TP110TS Tube Steel in High H_2S Corrosive Environment

机译：高H_2S腐蚀环境下TP110TS管钢力学性能退化的实验研究。

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The research on casing corrosion in sour environment by a synergism of sweet corrosion and H_2S corrosion has become the basis of casing selection and casing string safety evaluation with more and more sour reservoirs containing high H_2S concentration being developed. It is essential to scientifically utilize casing service ability and reasonably control production rate of gas well to achieve the effective and safe developing of gas resources during the safety period of casing service with a precise casing life prediction. Scanning electron microscopy and tensile testing were applied to investigate the corrosion of TP110TS tube steel in stimulant solution with carbon dioxide (CO2) and hydrogen sulfide (H_2S) at variable conditions of P_(CO2)/P_(H2S), temperature and time. This paper especially focused on the degradation of mechanical properties (elastic modulus, yield strength and tensile strength) of test specimens subjected to corrosion. Experimental results suggest that the fracture mode will transit from ductile fracture before corrosion to brittle fracture after corrosion and the mechanical properties will experience obvious degradation when the specimens were exposed to corrosive environment. Service life prediction model of casing was established on the basis of experimental observations and results.

机译：通过甜味腐蚀和H_2S腐蚀的协同作用对酸性环境下的套管腐蚀进行研究，已经成为套管选择和评价套管柱安全性的基础，越来越多的高H_2S浓度的酸性储层正在开发中。科学地利用套管服务能力，合理控制气井产量，在套管服务安全期内，准确预测套管寿命，才能有效，安全地开发天然气资源。采用扫描电子显微镜和拉伸试验，研究了在P_（CO2）/ P_（H2S），温度和时间的变化条件下，TP110TS管材在二氧化碳和硫化氢（H_2S）的刺激溶液中的腐蚀情况。本文特别着重于遭受腐蚀的试样的机械性能（弹性模量，屈服强度和拉伸强度）的下降。实验结果表明，断裂模式将从腐蚀前的韧性断裂转变为腐蚀后的脆性断裂，当试样暴露在腐蚀性环境下时，力学性能将明显下降。根据实验观察结果，建立了套管使用寿命预测模型。

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来源
《Computers, Materials & Continua》 |2011年第2期|p.157-165|共9页
作者
Deli Gao; Zengxin Zhao;
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作者单位

MOE Key Lab of Petroleum Engineering, China University of Petroleum, Beijing 102249, China.;

Sinopec International Petroleum Exploration and Production Corporation, Beijing, China;

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原文格式 PDF
正文语种 eng
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关键词
CO_2/H_2S corrosion; TP110TS tube steel; mechanical properties degradation; service life prediction;

机译：CO_2 / H_2S腐蚀;TP110TS管钢;机械性能下降;使用寿命预测;

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机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Experimental Study on Mechanical Properties Degradation of TP110TS Tube Steel in High H_2S Corrosive Environment

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