Volume 32 Issue 4
May  2015
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2015  >  32(4): 40-44
DONG Hongwei, JIA Jun, FAN Fan, HAO Chao, CHEN Long, XU Jiansheng. Flushing Fluid Eliminating Damage to Low Permeability Sandstone Gas Reservoir by Drilling Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(4): 40-44. doi: 10.3969/j.issn.1001-5620.2015.04.011
Citation: DONG Hongwei, JIA Jun, FAN Fan, HAO Chao, CHEN Long, XU Jiansheng. Flushing Fluid Eliminating Damage to Low Permeability Sandstone Gas Reservoir by Drilling Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(4): 40-44. doi: 10.3969/j.issn.1001-5620.2015.04.011
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Flushing Fluid Eliminating Damage to Low Permeability Sandstone Gas Reservoir by Drilling Fluid

doi: 10.3969/j.issn.1001-5620.2015.04.011

  • Xinglongyuan Xiaoqu of Changqing, Xi’an, Shaanxi 710018, China

  • Received Date: 2015-03-19
  • Publish Date: 2015-07-31
    Abstract
  • Filtrates of drilling fluid cause damage to low permeability sandstone gas reservoir, usually by water block, and sometimes by plugging by solid particles, retention of adsorbed polymer on the surface of pore throats, and water sensitive formation clays, all resulting in reduced rate of production. A flushing fluid, NDF-1, was developed to solve these problems. NDF-1 reversed the surface of the reservoir rocks from strong hydrophilicity to weak hydrophilicity, thus minimized the effect of capillary force and entered into the interior of some solid particles to disintegrate and remove solid blockades. Laboratory study showed that NDF-1 remarkably recovered permeability of rocks impaired by DIF damage, with percent recovery of permeability by 133.45%. Well CB3-3, treated by NDF-1, had gas production rate increased by 35.71% during well test.

     

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