Physics_A_Module_6_Exam_answers Arizona State University PHY MISC

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HOMEWORK 8. Fracturing materials and conductivity QUESTIONS: 1. What is the major difference between white and brown sands other than color? Brown sand has polycrystalline nature and increased ang... ularity. 2. What are three factors that affect fracture conductivity? Proppant type, particle size, proppant grain shape. 3. What are three “ideal” properties of a fracturing fluid? Adequate viscosity, good fluid loss control, low residue. 4. True or false—If the permeability of the fracture is lower than anticipated, then the dimensionless fracture conductivity will be lower than anticipated? True PROBLEM: You are a service company representative who has designed the following fracturing treatment: - Wellbore radius (rw): 0.328 ft - Reservoir height: 200 ft; bounded by competent shales - Reservoir Permeability (k): 1.0 mD - Proppant to be used: 500,000 lb Design Fracture Conductivity (kf*w): 1,500 mD*ft at 4 lb/ft2 proppant loading • Use the Cinco-Ley and Samaniego type graph (below) to advise your client on the expected well negative skin (the fracture treatment covers the full formation height) Lf= 200 2 =100 ft FCD= 1500 1∗100 =15 Sf +ln( Lf rw ) =0.8 Sf=0.8−ln( 100 0.328 )=−4.92 • Do you think this is the optimum fracturing treatment for this well? Yes because it stays constant, at Fcd more than 15 [Show More]

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