Volume 36 Issue 2
Apr.  2019
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WU Xia, YI Xiangyi, HUANG Wenqiang, HAO Wei, LI Qin. Discussion on the Quantitative Study and Impact Factors of Differentialized Corrosion in Fractures Generated by Acid Corrosion[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(2): 250-256. doi: 10.3969/j.issn.1001-5620.2019.02.021
Citation: WU Xia, YI Xiangyi, HUANG Wenqiang, HAO Wei, LI Qin. Discussion on the Quantitative Study and Impact Factors of Differentialized Corrosion in Fractures Generated by Acid Corrosion[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(2): 250-256. doi: 10.3969/j.issn.1001-5620.2019.02.021
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Discussion on the Quantitative Study and Impact Factors of Differentialized Corrosion in Fractures Generated by Acid Corrosion

doi: 10.3969/j.issn.1001-5620.2019.02.021

  • College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059

  • Received Date: 2018-12-23
  • Publish Date: 2019-04-30
    Abstract
  • The pattern and extent of the viscous fingering of an acid are two key factors affecting the differentialized corrosion of the wall surface of fractures by the acid. Quantitative srudy of the relationship between the two factors is rarely seen at present. In laboratory experiment, the viscous fingering of acid was dynamically simulated using finite volume method, the change patterns of viscous fingering at different viscosity ratios, viscosity differences and density differences were analyzed, and the extent of differentialized corrosion at different conditions was quantitatively characterized using parameters describing the extent of differentialized corrosion at a certain fingering level. It was found that at flow rate of 5 m3/min, a high level of differentialized corrosion was reached when the viscosity difference was between 250 mPa·s and 350 mPa·s, the viscosity ratio between 15 and 20, and the density difference between 0 g/cm3 and 0.01 g/cm3. A similar pattern of change of the differentialized corrosion by acid can be found by changing the flow rate.

     

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