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Corrosion Failure Analysis of D-class Rod in a Fire Drive Production Well in Xinjiang Oilfield
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Jie LI1, Yi-yang LI1, Ri-gu SU1, Cheng-xiu YU2, Kun DING3, Deng-ya CHEN1, De-zhi ZENG2, *
Science Technology and Engineering | 2025, 25(3) : 992 - 998
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Science Technology and Engineering | 2025, 25(3): 992-998
• Papers·Mining and Metallurgical Engineering •
Corrosion Failure Analysis of D-class Rod in a Fire Drive Production Well in Xinjiang Oilfield
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Jie LI1, Yi-yang LI1, Ri-gu SU1, Cheng-xiu YU2, Kun DING3, Deng-ya CHEN1, De-zhi ZENG2, *
Affiliations
  • 1. Engineering Technology Research Institute, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
  • 2. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
  • 3. Engineering Technology Department, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
Published: 2025-01-28 doi: 10.12404/j.issn.1671-1815.2309003
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The rod of a fire drive production well in Xinjiang oilfield is seriously corroded, and there are many corrosion pits on the surface. In order to find out the cause of rod corrosion failure, the metallographic structure and physical and chemical properties of the failed rod were tested and analyzed, and the corrosion characteristics were analyzed by scanning electron microscope, energy spectrometer and X-ray diffraction analysis, and the failure causes were found out combined with the service conditions of the rod. The results show that the chemical composition, metalloid structure and inclusions of the D-class rod meet the standard requirements of the rod. The rod has only been in service for 1 year and 8 months and its diameter has decreased from 19 mm to 16 mm, the average corrosion rate is 1.796 mm /a, and the maximum surface corrosion pit depth is 2.1 mm. The surface of the rod is mainly attached with FeCO3, FeS and CaCO3. It is judged that the rod is corroded by CO2/H2S and underscale corrosion caused by high salinity produced water. At the same time, a large amount of Cl- in the produced liquid promotes the development of pitting pits. It is recommended to inject corrosion and scale inhibitor into production wells with temperature lower than 50 ℃, pH value between 6 and 8, and formation water belonging to high calcium and high chlorine to protect the D-class rod and extend the service life of the rod.

fire flooding  /  the rod  /  corrosion  /  scale formation  /  cause of failure
Jie LI, Yi-yang LI, Ri-gu SU, Cheng-xiu YU, Kun DING, Deng-ya CHEN, De-zhi ZENG. Corrosion Failure Analysis of D-class Rod in a Fire Drive Production Well in Xinjiang Oilfield[J]. Science Technology and Engineering, 2025 , 25 (3) : 992 -998 . DOI: 10.12404/j.issn.1671-1815.2309003
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Year 2025 volume 25 Issue 3
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Article Info
doi: 10.12404/j.issn.1671-1815.2309003
  • Receive Date：2023-11-16
  • Online Date：2025-07-29
  • Published：2025-01-28
Article Data
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History
  • Received：2023-11-16
  • Revised：2024-06-24
Funding
Affiliations
    1. Engineering Technology Research Institute, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
    2. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
    3. Engineering Technology Department, PetroChina Xinjiang Oilfield Company, Karamay 834000, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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