33. What is meant by immiscible displacement? Give an example
34. Why would you want to determine the average water saturation behind the flood front at water breakthrough
35. Which reservoir would be more likely to have water coning problems? a) thin pay with a low API gravity oil b) thick pay with a high API gravity oil
36. What is the definition of fluid mobility
37. Which one of the flowing factors does not improve the displacement efficiency for water injection in a horizontal reservoir
a) Low oil viscosity
b) High formation permeability
c) Water-wet rocks
38. Which one of these following factors does not promote vertical equilibrium and segregated flow?
a) Low flood rates
b) Large fluid densities
c) High horizontal permeability
39. Which is likely to have lower mobility ratio – water influx into a gas reservoir , or water influx into an oil reservoir with oil wet rocks?
40. Under what two conditions is diffuse flow commonly found?
41. A well has calculated fractional flow f water equal t 0.6 . Assuming Bo = 1.35 and Bw = 1.02 what is the corresponding surface water oil ratio (WOR)
42. Does low vertical/horizontal permeability ratio enhance or retard coning tendencies?
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