Research and Utilization of Downhole Dynamic Corrosion Test Device

Abstract:

With the lengthen of the production time continuously, and the adjustment and implementation of development programs constantly, the situation of Jiangsu Oil field well casing will become worse, even damaged gradually, while corrosion is one of the main factors to cause casing leakage in Jiangsu Oil field. In order to study the corrosion mechanism and influencing factors, we developed downhole dynamic simulation experiment device. The device is mainly composed of the recycle loop system, temperature control system, pressure control system, the main riser, and the buffer vessel. It implements the control of factors impact on the oil casing corrosion such as temperature, partial pressure, flow rate etc and helps us study the corrosion behavior of downhole tubing and casing. The results of weightlessness and electron microscope scanning show that the flow velocity and flow pattern is the main factors of maximum casing corrosion near the oil pump suction rate, and the local corrosion by CO₂ is given priority to, this is consistent with the situation of field casing corrosion. It also shows that this experimental device has the advantages of reasonable structure, stable and reliable performance, easy operation, strong simulation and practicality.

• Periodical: Applied Mechanics and Materials (Volumes 397-400)
• Pages: 489-493
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.397-400.489
• Online since: September 2013
• Authors: Fei Gao, Fang Peng Li, Qiong Wu, Mei Ting Jiang
• Keywords: Corrosion, Dynamic Simulation, Equipment, Flow Pattern, Flow Velocity, Oil Pump Suction

References

[1] JIANG Sheng-li, ZHENG Yu-gui, QIAO Yan-xin, ect. Design of A High-speed Jet Impingement Erosion-corrosion Apparatus and In-situ Electrochemical Measurement[J]. Corrosion Science and Protection Technology, 2009, 21(05) , 489-491.

[2] ZHENG Yu-gui, YAO Zhi-ming, LONG Kang, etc. Liquid and Solid Two-phase Flow Erosion-corrosion Experimental Equipment and Dynamic Electrochemical Tests[J]. Corrosion Science and Protection Technology, 1993, 5(4); 286.

[3] Heitz E. Investigation of hydrodynamic test systems for the selec-lion of high flow rate resistanct materials[J]. Journal of Applied Electrochemistry, 1979, 9(2); 243.

[4] Dean S W. Velocity-accelerated corrosion testing and predic-lions-An overview[J]. Materials Performance, 1990, 29( 90): 61.

[5] JIANG Sheng-li, ZHENG Yu-gui, QIAO Yan-xin, etc. Design of A High-speed Jet Impingement Erosion-corrosion Apparatus and In-situ Electrochemical Measurement[J]. Corrosion Science and Protection Technology, 2009, 21(05) , 489-491.

[6] ZHENG Yu-gui, YAN Yong-gui, LONG Kang, ect. An Apparatus and Its Calibration for Erosion Corrosion Test Inliquid Particle Two Phase Flow with Laser Doppler Anemometry[J]. Journal of Chinese Society for Corrosion and Protection, 1999, 19(5): 301.

[7] ZHENG Yu-gui, YAO Zhi-ming, KE Wei. Recent research on erosion-corrosion[J]. Materials Science and Engineering of Powder Metallurgy, 1992, 10(3): 21.

[8] Chen T Y, Moccari A A. Development of Controlled Hydrodynamic Techniques for Corrosion Testing[J]. Corrosion, 1992, 48(3): 239-255.

DOI: 10.5006/1.3315930

[9] LIN Yu-zhen, YONG Xing-yue, XU Rui-fen. Development of an Experimental Device for Dynamic Simulation of Corrosion [J]. Total Corrosion Control, 1995, 9(02), 7～10.

[10] Zhang Xue-yuan, Dichao, Leiliangcai. Corrosion and Control of Carbon Dioxide[M]. Beijing: Chemical Industry Press, 2000. 6.

[11] Kermani M B, SmithLM. CO2 Corrosion Control in Oiland Gas Produc-tion Design Considerations[J]. The Institute ofMaterials, 1997: 1-16.

[12] ZHAO Zhang-ming. Corrosion Protection of Oil and Gas Wells and Material Selection Guide[M]. Beijing：Petroleum Industry Press, 2011. 1.