Volume 33 Issue 4
Jul.  2016
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QUAN Baohua, FANG Peilin, REN Qiang, YANG Kai, WANG Dong. Study and Application of a Completion Fluid Containing Acid Chelating Agents[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(4): 122-126. doi: 10.3969/j.issn.1001-5620.2016.04.026
Citation: QUAN Baohua, FANG Peilin, REN Qiang, YANG Kai, WANG Dong. Study and Application of a Completion Fluid Containing Acid Chelating Agents[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(4): 122-126. doi: 10.3969/j.issn.1001-5620.2016.04.026
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Study and Application of a Completion Fluid Containing Acid Chelating Agents

doi: 10.3969/j.issn.1001-5620.2016.04.026

  • CNOOC EnerTech-Drilling & Production Co, Tianjin 300452

  • Received Date: 2015-10-09
  • Publish Date: 2016-07-31
    Abstract
  • A completion fluid treated with acid chelating agents has been specially developed for use in Bozhong. In laboratory studies, the percent solution rate of the completion fluid to the oil sand taken from Bozhong was 3.62%at 60℃. At a mass ratio of 1∶1, reaction of the completion fluid and the oil sand for 72 hours resulted in a pH of 6.98. Percent reduction of swelling of the 28-2S sand cores was 88.7%. In permeability experiments, the permeability return of the oil sand tested with the completion fluid was 127.6%. The chelating capacity of the completion fluid was 110.15 mg/g to ferric ions, and 878.3 mg/mL to calcium ions. The corrosion rate of the completion fluid satisfied the needs for field operation. Oil production rate has been enhanced using the completion fluid as a perforation fluid.

     

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