STUDY ON CORROSION OF WEN-23 GAS WELLS IN ZHONGYUAN OIL FIELD

J Chin Soc Corr Pro

1998, Vol. 18

Issue (3): 227-232 DOI:

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STUDY ON CORROSION OF WEN-23 GAS WELLS IN ZHONGYUAN OIL FIELD

ZHENG Jia-shen FU Chao-yang LIU Xiao-wu PENG Fang-ming HUANG Xian-qiu (Department of Chemistry; Huazhong University of Science and Technology; Wuhan 430074)ZHAO Jin-mao WU Chan-qi XU Wei-dong WANG Xuan-kui (Oil field Chemistry Institute of Zhongyuan Petro

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Abstract Oil pipes and their corrosion products of WEN23-1 and 23-8 wells in Zhongyuan oil field were studied by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electron probe microanal-yser (EPMA). Corrosion tests of carbon steel in solutions containing CO2 were carried out. The results showed that CO2 and condensate water were the primary factors causing corrosion of gas well. Nonmetallic inclusion (MnS, Al2O3) in oil pipe was another cause to accelerate localized corrosion and cracking failure of oil pipes in the medium with CO2. The possibility of application of inhibitor to prevent CO2 corrosion of gas well was discussed.

Key words: Gas well Oil pipe corrosion Failure analysis Inhibitor

Received: 25 June 1998

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