ch8 - CHAPTER8 PropertiesofBlackOilsDefinitions q

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 8  Properties of Black Oils-Definitions Properties of Black Oils-Definitions Oil Density ( ρ o ), Oil Specific Gravity ( γ o ) and  Oil API Gravity  Oil Formation Volume Factor (B o ) Solution Gas Oil Ratio (R s ) Producing Gas Oil Ratio (R p ) Total Formation Volume Factor (B t ) Isothermal Coefficient of Compressibility (C o ) Coefficient of Viscosity of Oil ( μ o ) Interfacial Tension ( σ ) 8 - 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Oil Density ( ρ o ), Oil Specific Gravity  ( γ o ) and Oil API Gravity (°API) Oil Density:     ρ o    =    mass of oil  @  T   P volume of oil  @  T   P   (1) Oil Specific Gravity:     γ o    =    ρ o   @  T   P ρ w   @  the same T   P   (2) Oil API Gravity:     ° API  =   141.5 γ o       131.5   (3) where API = American Petroleum Institute γ o = oil specific gravity at 60 ˚F and 1  atmosphere pressure 8 - 2
Background image of page 2
Oil Density ( ρ o ), Oil Specific Gravity  ( γ o ) and Oil API Gravity (°API)  (continued) For water,  γ o  = 1, ˚API = 10. If the liquid is less dense than water, ˚API > 10. If the liquid is denser than water, ˚API < 10. Typical Oil API Gravities: Heavy oil < 20 ˚API Black oil < 40 ˚API Volatile oil > 40 ˚API Condensates ~ 40 - 60 ˚API 8 - 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Oils with API gravities in the range 35 - 45 and  free of contaminants are usually in high demand. 8 - 4
Background image of page 4
Oil Formation Volume Factor (B o ) Definition: Volume of reservoir oil required to  produce one barrel of oil in the  stock tank. Can be calculated from the equation:    B o   =   Vol .  of oil  @  T   P Vol .  of resultant tank oil  @  standard conditions     (4) Assume for now that stock tank conditions are  the same as standard conditions. If they are not  the same, some minor corrections can be made to  the B o  later. Units: reservoir barrels/stock tank barrel (res bbl/STB) Magnitude: Always greater than 1.0 8 - 5
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Oil Formation Volume Factor (B o (continued) Practice Problem: A sample of reservoir oil is confined in a PVT cell  as shown in the accompanying flash vaporization  experiment. The oil and gas volumes at each  pressure and temperature can be measured or  calculated and are as shown on the diagrams. 1. Calculate the oil formation volume factor at  each pressure and temperature. 2 Sketch a graph of the oil formation volume  factor versus pressure. Solution: B o1  =  8 - 6
Background image of page 6
B o2  B o3   B osc  =  8 - 7
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Flash Vaporization Experiment 8 - 8
Background image of page 8
o (continued) A sketch of B o  versus Pressure. B
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/14/2011 for the course PGE 312 taught by Professor Peters during the Spring '08 term at University of Texas at Austin.

Page1 / 54

ch8 - CHAPTER8 PropertiesofBlackOilsDefinitions q

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online