Answer Happy

(a) Sketch and label a simple pore grain system with all relevant points showing oil-water-gas distribution in: (i) Oil-Wet system (4 Marks) (ii) Water - Wet system (4 Marks) (b) Figure 2 shows an oil droplet trapped in a single capillary. Figure 2 Oil trapped in a single capillary (i) The contact angle on the A side is 30∘, and that on the B side is 20∘. The diameter of the capillary tube on the A side is 0.0005 cm and, on the B side is half the size of the A side. The interfacial tension between oil and water is 25dyne/cm. Calculate the threshold pressure required to move the oil droplet to the right. (5 Marks) 3 (ii) Supposed a waterflooding process is initiated which resulted in interstitial velocity of 2 ft/ day, using injection water with a viscosity of 5cp. Calculate the capillary number for the process. (5 Marks)