Volume 32 Issue 2
Mar.  2015
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ZHANG Hong, LAN Qiang. Study on Hydrophobic Nano Calcium Carbonate Drilling Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(2): 43-46. doi: 10.3969/j.issn.1001-5620.2015.02.011
Citation: ZHANG Hong, LAN Qiang. Study on Hydrophobic Nano Calcium Carbonate Drilling Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(2): 43-46. doi: 10.3969/j.issn.1001-5620.2015.02.011

Study on Hydrophobic Nano Calcium Carbonate Drilling Fluid

doi: 10.3969/j.issn.1001-5620.2015.02.011
  • Received Date: 2014-12-23
  • Publish Date: 2015-03-31
  • Nano calcium carbonate was modified for better hydrophobicity. The modified calcium carbonate was then used to formulate a temporary plugging drilling fluid. At temperatures below 140℃, the fluid had stable filtration property, and was resistant to contamination caused by 2.5% CaCl2, or 9.0% mono valence salts, or 14.0% clay. It also had good shale inhibitive capacity. The film strength under extreme pressure was 190 MPa, indicating good lubricity of the drilling fluid. Percent recovery of permeability of cores with initial permeability ranging from 50×10-3 μm2 to 1,000×10-3 μm2 was greater than 90% for all these cores tested. It was also environmentally friendly.


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