Effect of Drilling FluidAdditives to Dispersion of Nano ParaffinEmulsions

CHENXinwei*, HUANGJinjun ， LI Ran LI Chunxia
Page No. 6-12

Studied the effect of conventional drilling fluid additives on nanoparaffin emulsions properties,
Including tackifiers，viscosity reducers，fluid loss control agents and
inhibitors．First，measured the different concentrations of nano paraffin emulsion particle size
distribution by Laser particle size analyzer．Then measured the particle size distribution of
nanoparaffin emulsion which have join different kinds and concentrations of the drilling fluid
additives．After that，measured the stability of nanoparaffin Emulsions with kinds and
concentrations of the drilling fluid additives.Finally, nanoparaffin emulsion sedimentation stability
analyzed by TLAB dispersion stability analyzer．The results showed that different concentrations of
nano-emulsion wax particle size distribution very similar，and the average diameter is
65nm．Most of the drilling fluid additives have little effect on nano paraffin emulsion particle size
distribution．Inhibitors like hydrolyzed polyacrylonitrile ammonium salt and viscosifier like
xanthan gum causes a substantial increase in nanoparaffin emulsion particle size．After joining the
preferred drilling fluid additives，sedimentation stability of nano paraffin emulsion no significant
change，from the result of the TLAB dispersion stability analyzer can be seen that after standing
24h，nanoemulsion paraffin show great sedimentation stability.
Key words: Nano paraffin emulsion; drilling fluid additives; particle size distribution; dispersion
stability.