A A Chemical Enhanced Oil Recovery C Eor Flood Is To Be Implemented On A Reservoir That Was Previously Waterflooded 1 (40.92 KiB) Viewed 44 times
(a) A. Chemical Enhanced Oil Recovery (C.EOR) flood is to be implemented on a reservoir that was previously waterflooded to remain oil saturation (ROS). Oil and water viscosities during waterflooding are 4.0cp and 5.0cp respectively. The average interstitial velocity for displacement is 2.5ft/ day. Assume that the water-oil relative permeabilities shown in the Figure 1 can be used for water-oil system. Reservoir temperature is 220∘F. Figure 1 Water-oil relative permeability (i) What would happen to the value of mobility ratio if the displacement fluid were replaced by a CEOR solution with IFT of 0.05 dynes /cm and the viscosity is 0.45cp. Show your calculation. (4 Marks) (ii) Do you think polymer solution should be added into this CEOR solution? Explain and show your calculation. (4 Marks) (iii) What is the approximate Capillary Number of the CEOR process. Show your calculation. (4 Marks)
(b) What are the best EOR techniques and reasons for the different following situations: (i) High oil viscosities (2 Marks) (ii) High surface tension between oil and water (2 Marks) (iii) Light oil (2 Marks) (iv) High acid number in crude oil (2 Marks)
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