Abstract
ABSTRACT Fracturing fluid viscosity has an important influence on the outcome of any hydraulic fracturing treatment. Much work has been done on the effect of sand or particle concentration on the viscosity of Newtonian fluids. Work concerning the effects of proppant concentration on the apparent viscosity of non-Newtonian fracturing fluids is now beginning to appear in the literature. Several correlations involving the effects of proppant or particle concentration in non-Newtonian fluids have been presented recently.1–5 This work presents an assessment of influence of proppant on fracturing fluid viscosity using the friction pressure properties of sand-laden non-Newtonian fracturing fluid compared to the friction pressure of the fluid without proppant. For this presentation, the premise is offered that viscosity effects due to the suspended particles in non-Newtonian fluids'should be correlatable when comparing fluid pressure behavior of these fluids in turbulent flow. Correlations have been worked out to describe the effects of sand concentration on effective fluid viscosity. These results compare favorably to the results obtained by other investigators addressing the problem using different techniques.
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