Description
Julio Herbas is a Petroleum Engineer with extensive experience in reservoir engineering evaluations, with emphasis in classical methods, production performance evaluations, driving mechanisms, volumetrics estimations, material balance for reservoir characterization and production forecast, decline curve analysis, design and operations of Secondary Recovery by water and gas floods and Enhanced Oil Recovery projects in light oil, heavy oil, gas and condensate reservoirs; he has lead the design, implementation and operations of thermal, water and gas floods, solvents, and chemicals projects in Latin America, Europe, Africa, and Asia, working for Lagoven S.A., Intevep S.A., Shell International, BP, Total-Statoil, Maersk, Tullow Oil, Xodus Group, io consulting, in Venezuela, United Kingdom, Germany, China and USA.
This lecture addres the basics principles of reservoir engineering and methods to interpret hydrocarbons reservoirs performance and determining representative parameters that affect the production and the recovery factors in oil and gas reservoirs. It describes methods to calculate the original hydrocarbon volumes in place, reservoir pressures, PVT for fluid characterization, material balance, Darcy law, radial flow, well inflow equations, well testing fundamentals for oil and gas wells, water encroachment, aquifer models, and fluids displacement by water and gas.
The course focus in the application of classical methods to interpret and understand the reservoir production performance, how to use the field data to determine representative reservoir parameter, reserves estimations and methods to evaluate effects of water and gas injection for secondary recovery.
- Provide the participants with the basic knowledge required to quantify the hydrocarbons volumes in place,
- to estimate recovery factors, understand the rock and fluid parameters
- Provide an insight of laboratory procedures,
- Provide an understanding for the parameters influencing the production performance, and the final recovery factor;
- to describe the principles of radial flow and well testing in oil and gas reservoirs,
- Understand the water encroachment theory, the aquifer models
- Present and discuss the equations to calculate variables and performance of the oil displacement by water and gas injection.
- Reservoir Engineers
- Reservoir Managers,
- Production
- Engineers,
- Geologists,
- Geophysicists
- Technical field personnel from oil companies or service companies that need to gain or increase their understanding of reservoir performance under Enhanced Oil Recovery projects
This training can be delivered in house, based on work shop sessions for groups of delegates with interest in understanding the principles of Enhanced Oil Recovery methods; it can be tailored to specific company needs.
Day 1
Introduction to Reservoir Engineering
- Calculating of Hydrocarbon Volumes in the Reservoirs
- Reservoir Fluid Pressures
- Recovery Factors
- Gas Reservoirs, Real Gas Equation Of State
- Material Balance for Gas Reservoirs: Recovery Factor
- Phase Behavior in Hydrocarbon Systems
PVT Analysis
- Pressure Volume Temperature Concept & Basic Parameters
- PVT Fluid Sampling Methods
- Laboratory Experiments to Determine the PVT Parameters
- Complete PVT Analysis Report Examples
Day 2
Introduction & Material Balance Equations for Hydrocarbon Reservoirs
- Havlenah and Ode Material Balance Methods
- Driving Mechanisms
- Solution Gas
- Gas Cap
- Natural Water Drive
- Compaction Drive and Rock Compressibility
Introduction to Darcy’s Law Equations
- Linear Flow, Units, And Conversions
- Real Gas Potential
- Datum Pressures Definition
- Radial Steady-State Flow; Well Stimulation & Skin Factor
- Two-Phase Flow: Effective and Relative Permeabilities
- Secondary Recovery Mechanisms
Day 3
Radial Flow Equations and Well Test Interpretations
- Radial Differential Flow Equation
- Transient, Semi Steady and Steady Conditions for The Radial Flow Equation
- The Linearization of Equation for Fluids of Small and Constant Compressibility
- Well Inflow Equations Stabilized Flow Conditions
- Semi-steady State and Steady State
- Examples Application of The Stabilized Inflow Equations
- Generalized Inflow Equation under semi steady-state conditions
Day 4 Part 1
- Introduction to Oil Well Test Radial Flow Diffusivity Equations
- Solutions Constant Terminal Rate, Transient, and Semi-steady State Flow
- Dimensionless Variables
- Pressure Drawdown Tests & Superposition
- Pressure Build-Up Interpretation Methods
- Multi-rate Drawdown Tests
- Skin Factors, Partial Well Completion Effects.
- Practical Well Surveying
- After Flow Analysis
Day 4 Part 2
- Gas Well Tests Radial Flow
- Basic Equation for Radial Flow Single Phase
- Real Gas Flow Pressure Square Equation, Russell, Goodrich, Et. Al
- Real Gas Pseudo Pressure function m(p), Al Hussainy, Ramey, Crawford
- Equations
- Non-Darcy Flow and Non-Darcy Coefficient F
- Constant Terminal Rate Solution for The Real Gas Flow
- Gas Well tests Theory and Equations
- Multi-rate Tests Gas Wells
- Pressure Buildup Tests Gas Wells
- Pressure Buildup Analysis Solution Gas Drive Reservoirs
Day 5 Part 1
- Aquifers & Natural Water Influx Introduction of Aquifers
- Unsteady State Water Influx Hurst and Van Everdingen
- Application Unsteady State Water Influx in History Matching
- Finite Aquifers Water Influx Fetkovitch
- Water Influx Calculations
- Applications of Influx Calculations
Day 5 Part 2
- Immiscible Displacement Fundamentals
- Fractional Flow Equation Buckley-Leverett One Dimensional Displacement
- Oil Recovery Calculations
- Displacement in Segregated Flow Conditions
- Effect of a Finite Capillary Transition Zone in Displacement Calculations
- Fluid Displacement in Stratified Reservoirs
- Fluid Displacement in absence of Vertical Equilibrium
- Numerical Simulation of Immiscible, Incompressible Displacement
- Final Discussions, Summary and Wrap Up
End of the Training
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