| ZHANG De-ping,SUN Miao-miao,CAO Xiang-kang,DONG Ze-hua.Progress in Corrosion Inhibitor Evaluation and Corrosion Monitoring Technology in Oil Recovery Industries[J],49(11):1-12 |
| Progress in Corrosion Inhibitor Evaluation and Corrosion Monitoring Technology in Oil Recovery Industries |
| Received:October 14, 2020 Revised:November 09, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.11.001 |
| KeyWord:oilfield corrosion corrosion inhibitor corrosion monitoring intelligent injection |
| Author | Institution |
| ZHANG De-ping |
School of Petroleum Engineering, Northeast Petroleum University, Daqing , China;National Energy and CO2 Flooding and Sequestration Technology Research Experiment Center, Songyuan , China |
| SUN Miao-miao |
Yantai Nanshan University, Yantai , China |
| CAO Xiang-kang |
Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan , China |
| DONG Ze-hua |
Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan , China |
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| Abstract: |
| Due to the influence of salinity, CO2 or H2S, the underground pipe column and surface gathering and transportation pipeline suffer from severe corrosion in oil and gas exploitation industry, which leads to shutdown and even serious environmental accidents and economic losses. Corrosion inhibitor is the most widely used anti-corrosion technique in the above industries and the current evaluation methods for corrosion inhibitor include weight loss, Tafel polarization, linear polarization, electrochemical impedance, electrochemical noise, coulomb discharging method, and quartz crystal microbalance. Although the indoor evaluation methods are relatively mature, in the field applications, due to the complex fluid composition and corrosion products, the inhibitor performance in field is greatly different from that in indoor test, and there is still lack of reliable field evaluation method for corrosion inhibitor. Some widely used evaluation methods for corrosion inhibitors were introduced firstly. In addition, combined with the development of field corrosion monitoring techniques, electrochemical impedance probe, electrical resistance probe, magnetic resistance probe, hydrogen flux probe, FSM field fingerprint current method and residual concentration analysis of corrosion inhibitors were introduced to monitor the field performance of corrosion inhibitors and analyze the advantages and disadvantages of various online monitoring schemes for corrosion inhibitors. Finally, the management scheme of online corrosion monitoring and intelligent injection of corrosion inhibitor in oil field was discussed, which not only effectively reduced the corrosion of oil and gas pipelines, but also realized appropriate addition of corrosion inhibitor by PID controller, thus reducing water treatment cost and improving the effectiveness and economy of corrosion inhibitor. Despite online corrosion monitoring techniques have made great progress in oil and gas industries, due to the complexity of oilfield corrosion, the precision and reliability still has a big gap from industrial requirements. Most corrosion monitoring techniques are still very rough for local corrosion monitoring, and cannot predict the local corrosion rate and occurrence location reliably, so corrosion engineers need to pay attention to further developing new corrosion monitoring solutions. |
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