Volume 32 Issue 1
Jan.  2015
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BAI Chaofeng, HUANG Kaiwen, ZHANG Chong, YU Yi, YUE Qiansheng, WU Hongte. Optimization of Flocculation Performance of PRD Drilling Fluid for Fine Solids[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(1): 46-48. doi: 10.3969/j.issn.1001-5620.2015.01.012
Citation: BAI Chaofeng, HUANG Kaiwen, ZHANG Chong, YU Yi, YUE Qiansheng, WU Hongte. Optimization of Flocculation Performance of PRD Drilling Fluid for Fine Solids[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(1): 46-48. doi: 10.3969/j.issn.1001-5620.2015.01.012
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Optimization of Flocculation Performance of PRD Drilling Fluid for Fine Solids

doi: 10.3969/j.issn.1001-5620.2015.01.012

  • East campus of the Yangtze University, Jingzhou, Hubei 434023, china

  • Received Date: 2014-11-13
  • Publish Date: 2015-01-30
    Abstract
  • Particle size distribution was tested for barite, ultra-fine calcium carbonate, bentonite and shale cuttings (from reservoir section) dispersed in liquids, and their effects on the permeability of reservoir formations were evaluated. It was found that the bentonite and shale cuttings, which contain large numbers of micron and submicron particles, blocked the flow channel of the cores. Based on the test results, a flocculant, PL-1, was selected to flocculate these fine solids. In laboratory core flooding test, the PRD drill-in mud (for low-permeability reservoir drilling) treated with 0.1% PL-1 gave a percent permeability recovery of 79.7%, while PRD drill-in fluid not treated with PL-1 gave a percent permeability recovery of 66.9%, showing the efficiency of PL-1 in reservoir protection. PL-1 also helped reduce the filter loss of PRD.

     

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