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Corrosion Behavior of P110 Tubing Steel in the CO2-saturated Simulated Oilfield Formation Water with Element Sulfur Addition
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State Key Laboratory of performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Institute of CNPC,State Key Laboratory of performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Institute of CNPC,State Key Laboratory of performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Institute of CNPC,State Key Laboratory of performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Institute of CNPC,State Key Laboratory of performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Institute of CNPC,State Key Laboratory of performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Institute of CNPC

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National Nature Science Foundation of China under Contracts of 51301202 and 21506256

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    Abstract:

    With continuously growing oil and gas demand, exploitation of highly sour reservoirs brings large corrosion risks due to the coupling effects of corrosive factors including elemental sulfur, CO2, and formation water. In the present work, corrosion behavior of P110 tubing steel in simulated oilfield formation water containing elemental sulfur and CO2 was investigated by immersion tests and electrochemical measurements. The results indicated that increasing temperature accelerated the corrosion rate of P110 tubing steel, promoted the formation of iron sulfide, and caused serious pitting corrosion. However, influence of temperature varied at different temperature range mainly due to the different corrosion-controlling species like CO2 at low temperatures and elemental sulfur at high temperatures. Based on the results, the coupling effects of elemental sulfur and carbon dioxide were discussed.

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[Jian Miao, Juntao Yuan, Yan Han, Xiuqing Xu, Lei Li, Ke Wang. Corrosion Behavior of P110 Tubing Steel in the CO2-saturated Simulated Oilfield Formation Water with Element Sulfur Addition[J]. Rare Metal Materials and Engineering,2018,47(7):1965~1972.]
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History
  • Received:April 24,2017
  • Revised:August 10,2017
  • Adopted:August 18,2017
  • Online: October 10,2018
  • Published: