Oil formation volme factor, B. measeured in bbl'STB- Volume of an oil phase sample with its dissolved gas at reservoir conditions divided by the volume of oil phase of the same sample at stock tank conditions (ie after its dissolved gas has liberated) a. Draw a pictorial illustration of B. b. What are the three factors that causes the volume of oil that enters the stock tank to be less than the volume of oil which flows into the wellbore. Compare their magnitudes. c. A typical graph of B, is given Fig. 1 based on this figure explain the following Explain the physical phenomena that causes B, to attain a negative slope above p. Explain the physical phenomena that causes B, to change rapidly if p is less than p. Why we cannot have a B, less than 1. 1.40 2500 PSIA Bog" 1.333 3500 PSIA Bo 1,310 P1.30 1200 PSIA Bo 1.210 1.20 1.10 14.7 PSIA 160F Bo*1.040 14.7 PSIA 8 60F Bo1.000 21.002 500 1000 1500 2000 2500 3000 3500 PRESSURE, PSIA Fig.1 A typical Formation VolumeFactor vs Pressure behavior FORMATION VOLUME_ FACTOR, BBL/STB_ BUBBLE POINT PRESSURE INITIAL PRESSURE