Experimental Investigation of the Effect of Temperature on Friction Pressure Loss of Polymeric Drilling Fluid Through Vertical Concentric Annulus

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Gürçay K. O., Akın S., Gucuyener H.

44th Workshop on Geothermal Reservoir Engineering, Stanford University, California, United States Of America, 11 - 13 February 2019, vol.213, pp.1-7

  • Publication Type: Conference Paper / Full Text
  • Volume: 213
  • City: California
  • Country: United States Of America
  • Page Numbers: pp.1-7
  • Middle East Technical University Affiliated: Yes


Accurate estimation of annular friction pressure loss is necessary to perform drilling and well completion operations without lost

circulation, pipe sticking or more serious well control problems. Determination of friction pressure loss for Newtonian and non-Newtonian

fluids has been investigated in several experimental and theoretical works by considering the effects of eccentricity, pipe rotation or pipe

geometry. However, there is a gap in the studies about the temperature effect that is important especially in geothermal wells.

This study experimentally investigated the effect of temperature on friction pressure loss through vertical concentric annulus by using

water and the polymer based drilling fluid including Polyanionic Cellulose and Xanthan Gum. Experiments were conducted in flow loop

having 21-ft smooth and concentric annular test section (2.91 in ID casing x 1.85 in OD pipe).

The effect of temperature on rheological model parameters, apparent viscosity, Reynolds number was examined. It was found that

consistency index and yield point were more sensitive to change in temperature than flow behavior index. Also, apparent viscosity

decreased exponentially with increasing temperature and this decrease was more obvious in low shear rate values. Then, according to

Reynolds number – temperature plot, earlier regime transition was observed with increasing temperature.

As a result, increasing temperature caused the decrease in friction pressure loss, and temperature effect should be considered in future

experimental and theoretical studies in order to estimate friction pressure loss in annuli precisely.