Phase Behavior of Reservoir Fluids
How reservoir fluids behave between the reservoir and the stock tank: hydrocarbon chemistry, phase diagrams of pure components, mixtures and reservoir fluids, fluid typing, natural gas, oil and water properties with gas hydrates, fluid sampling, constant composition expansion, differential liberation, separator and constant volume depletion tests, flash calculations, the Peng-Robinson equation of state, and characterization and tuning for gas cycling, miscible CO₂ injection and CO₂ storage.
PET-260 Year 2 3 credits 12 lessons · 3 h 44 min ▶ Video lessons coming soon
Offered by HSM University · Petroleum Engineering
This is the American version of this course. See the Canadian version.
What you'll learn
- Describe hydrocarbon families and carbon numbers in reservoir fluids, and convert between mole, mass and volume fractions using molar mass and gas gravity.
- Interpret pressure-temperature and pressure-volume diagrams for pure components and binary mixtures, and estimate vapor pressures with the Lee-Kesler correlation.
- Read multicomponent phase envelopes and classify reservoir fluids as black oil, volatile oil, gas condensate, wet gas or dry gas from field data.
- Calculate pseudo-critical properties, z-factors by the Dranchuk-Abou-Kassem method, gas formation volume factor, density, viscosity and sour gas corrections.
- Estimate bubble point, solution gas-oil ratio, oil formation volume factor and oil viscosity with black-oil correlations, and judge their uncertainty.
- Calculate formation water properties and predict and prevent gas hydrates, including inhibitor requirements by the Hammerschmidt equation.
- Plan representative fluid sampling by formation tester, bottomhole sampler and separator recombination, and apply quality control checks.
- Interpret constant composition expansion and differential liberation data, apply the Y-function, and adjust differential data to separator conditions.
- Select an optimum separator pressure from separator tests, and use constant volume depletion data for gas condensate material balance.
- Calculate K-values with the Wilson correlation and solve flash, bubble point and dew point problems with the Rachford-Rice equation.
- Apply the Peng-Robinson equation of state with mixing rules, binary interaction parameters and volume translation to reservoir fluid mixtures.
- Characterize and tune an equation of state to laboratory data, and apply it to gas cycling, minimum miscibility pressure and CO₂ storage.
Course content
12 lessons · 3 h 44 min total · final exam
- 1 Hydrocarbon chemistry for reservoir engineers 19 min · quiz
- 2 Phase behavior of pure components and binary mixtures 20 min · quiz
- 3 Multicomponent phase envelopes and reservoir fluid types 19 min · quiz
- 4 Natural gas properties 18 min · quiz
- 5 Oil properties and black-oil correlations 19 min · quiz
- 6 Formation water and gas hydrates 19 min · quiz
- 7 Sampling reservoir fluids 19 min · quiz
- 8 Constant composition expansion and differential liberation 19 min · quiz
- 9 Separator tests and constant volume depletion 17 min · quiz
- 10 Equilibrium ratios and flash calculations 18 min · quiz
- 11 Equations of state for reservoir fluids 18 min · quiz
- 12 EOS characterization, tuning and applications 19 min · quiz
- E Final exam 20 questions
Requirements
Recommended background. You can start any course at any time.
Description
How reservoir fluids behave between the reservoir and the stock tank: hydrocarbon chemistry, phase diagrams of pure components, mixtures and reservoir fluids, fluid typing, natural gas, oil and water properties with gas hydrates, fluid sampling, constant composition expansion, differential liberation, separator and constant volume depletion tests, flash calculations, the Peng-Robinson equation of state, and characterization and tuning for gas cycling, miscible CO₂ injection and CO₂ storage.
Part of the Engineering stream, typically taken in year 2.