Volume 35 Issue 2
Mar.  2018
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2018  >  35(2): 138-142
WU Ruoning, XIONG Hanqiao, YUE Chaoxian, ZHU Jie, SUN Yunchang, WANG Qiren. A New High Density Solid-free Clear Saltwater Completion Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(2): 138-142. doi: 10.3969/j.issn.1001-5620.2018.02.023
Citation: WU Ruoning, XIONG Hanqiao, YUE Chaoxian, ZHU Jie, SUN Yunchang, WANG Qiren. A New High Density Solid-free Clear Saltwater Completion Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(2): 138-142. doi: 10.3969/j.issn.1001-5620.2018.02.023
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A New High Density Solid-free Clear Saltwater Completion Fluid

doi: 10.3969/j.issn.1001-5620.2018.02.023

  • School of Oil & Natural Gas Engineering, Southwest Petroleum University, Chengdu Sichuan 610500

  • Received Date: 2017-12-05
  • Publish Date: 2018-03-30
    Abstract
  • In laboratory studies, solubilizing agent was used to increase the solubility of commonly used inorganic salts such as CaCl2 and ZnCl2 to formulate a new cost-efficient high density solid-free clear saltwater completion fluid. The addition of inorganic salts in a completion fluid increases the density of the fluid while not increasing its solids content. Two solubilizing agents were selected through laboratory experiments, which performed best in a solution containing 2%LAS-30+2%SLF-4. A clear saltwater completion fluid prepared with the said solution can have density of 1.926 g/cm3 with compounded inorganic salts. At this density, the concentration of CaCl2 is 160 g/100 mL water, and the concentration of ZnCl2 is 98 g/100 mL water. The new completion fluid has apparent viscosity of 33 mPa s, temperature tolerance of 140℃, and recovery of damaged permeability as high as 96%. This completion fluid performed very well in reservoir protection.

     

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