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- Lecture # 15
- Properties of Black Oils
- Definitions
- (pages 224-240)
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- Properties of Black Oils Needed for Reservoir Engineering Calculations:
- Formation Volume Factor of oil Bo
- Total Formation Volume Factor of oil Bt
- Solution Gas oil Ratio Rs
- Coefficient of Isothermal Compressibility Co
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- Properties of Black Oils Needed for Reservoir Engineering Calculations:
- Coefficient of isobaric thermal expansion bo
- Oil Viscosity mo
- Interfacial Tension
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- Understand the behavior of those PVT properties (Bo,Rs,…) vs P and type
of fluid (now)
- Evaluate PVT properties from (later)
- Field data
- Laboratory studies
- Correlations
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- Specific gravity of a liquid
- API gravity
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- Formation Volume Factor of Oil
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- Volume of Oil + Dissolved
gas Bo = at Reservoir Pressure & Temp.
- Volume of Oil entering
Stock
- tank at Tsc, Psc
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- How much gas is dissolved in the oil volume per volume basis
- Rs depends upon pressure
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- Also called Two-phase formation volume factor
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- Provides Instantaneous change of volume with P at constant T
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- (Use in Steam Injection Processes)
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- Viscosity is a measure of the resistance to flow exerted by a fluid
- This is called dynamic viscosity and has units of
- centipoise = g mass / 100 sec cm
- Kinematic viscosity is viscosity / density, units are in
- centistokes = centipoise /g/cc
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- Calculation of two-phase flow
- Gas-lift and pipeline design
- Calculate oil recovery either from natural depletion or from recovery
techniques such as waterflooding and gas-injection processes
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Notes