Dispersive and filter loss performance of calcium carbonate nanoparticles in water for drilling fluid applications

Xiaodong Bai*, Xuemei Yong, Vasileios Koutsos, Licheng Deng, Ke Li, Yi Zhou, Yumei Luo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Adding nanoparticles in a drilling fluid can aid in the sealing of the nanopores in the borehole wall rock and the mud cake; in this way, the filtrate loss of the drilling fluid can be reduced and the borehole wall is stabilized. In this work, the spectrophotometric method was used to study the effect of dispersants on calcium carbonate nanoparticles.The best dispersion effect was achieved at cetyltrimethyl ammonium bromide (CTAB) concentration of 4 wt.%, dispersing time of 45 min, pH value of 8 and stirring speed of 900 rpm. The structure analysis showed that the adsorption layer was formed on the surface of calcium carbonate nanoparticles after CTAB modification, and no new crystalline compounds appeared. Under these optimized dispersing conditions, aggregation was prevented as manifested by the dramatically decreased average particle size of calcium carbonate nanoparticles while the surface hydrophilicity and Zeta potential of calcium carbonate nanoparticles both increased. Furthermore, we showed that a drilling fluid incorporating such well dispersed calcium carbonate nanoparticlesexhibit decreased filter loss and thus better performance in sealing compared to the calcium carbonate nanoparticleswithout dispersants.
Original languageEnglish
Article number485704
Pages (from-to)1-9
Number of pages9
JournalNanotechnology
Volume32
Issue number48
Early online date16 Aug 2021
DOIs
Publication statusPublished - 6 Sept 2021

Keywords / Materials (for Non-textual outputs)

  • calcium carbonate nanoparticles
  • dispersion
  • drilling fluid
  • filter loss

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