PRACTICAL CONSIDERATIONS FOR FRACTURE TREATMENT DESIGN 2500 2000 100°F 1500 125°F 1000 500 150°F % % 175"F, 200°F 0 I 0 1 2 3 4 5 Time (hr) Figure P-10-Apparent viscosity at 170 sec-' for 40 Ib/lOOO gal borate-crosslinked fluid. P- 15