fluid is represented by black triangles the viscosity curve of the tested fluid is represented by a dotted line no scale is provided for the viscosity measurements as the fluid temperature traversed the melting point of the alcohol the fluid viscosity fell dramatically later in the test the fluid temperature was lowered below the melting point of the alcohol the fluid viscosity did not recover indicating that the system 39 s ability to form micelles was permanently destroyed the settling tests were performed at room temperature using 200 ml graduated cylinders the base viscoelastic surfactant fluid for all of these tests was 3 vol emhac and 4 wt potassium chloride with an initial viscosity of 168 cp at a shear rate of 170s u2212 1 as measured on a fann 35 viscometer the proppant size used in all these tests was 20 40 mesh to ensure a comparable surface area the resin content of the curable proppants used in this study varies from 1 8 to 4 0 wt depending on the manufacturer 39 s specifications but was constant for each proppant type the following mixing procedure was used 200 ml of the fluid combined with 100 g proppant equal to 4 2 ppg pounds per gallon proppant loading was vigorously shaken in a beaker to obtain a homogenous suspension and transferred into a graduated 200 ml cylinder the time for the visible separation and for the complete settling of the proppant was then observed the viscosity of the overlaying fluid was measured by fann 35 and compared to the initial viscosity of the fluid table 2 shows the settling times for curable resin coated proppants first and then for reference typical settling times of uncoated proppants u201c visc cp 170s u2212 1 u201d refers to the viscosity in.