Unit 2011: Enhanced Oil Recovery (EOR) Techniques and Applications

1. Introduction to Enhanced Oil Recovery

• Definition and significance of EOR
• Historical development and context in oil production
• Importance of maximizing oil recovery from mature fields
• Overview of EOR techniques: thermal, gas injection, chemical, and others
• Challenges in implementing EOR (technical, economic, environmental)

2. Primary Oil Recovery Methods

• Natural reservoir pressure mechanisms
• Artificial lift methods:
  • Rod pumping
  • Gas lift
  • Electric submersible pumps
• Water flooding as an initial displacement method
• Limitations of primary recovery methods
• The rationale for transitioning to EOR techniques

3. Secondary Oil Recovery Techniques

• Water flooding:
  • Mechanism and implementation
  • Benefits and limitations
• Gas injection:
  • Types (miscible and immiscible)
  • Operational considerations
  • Advantages and challenges
• Chemical flooding:
  • Types of chemicals used (polymers, surfactants)
  • Oil displacement efficiency
• Comparative analysis of secondary recovery methods

4. Tertiary Oil Recovery Methods

• Thermal methods:
  • Steam injection (cyclic steam stimulation, steam flooding)
  • In-situ combustion
  • Mechanisms and field applications
• Chemical methods:
  • Surfactant flooding
  • Polymer flooding
  • Alkaline flooding
• Challenges in tertiary recovery (reservoir heterogeneity, chemical degradation, operational costs)
• Effectiveness and case examples

5. Reservoir Characterization for EOR

• Importance of reservoir characterization in EOR selection
• Core analysis:
  • Porosity, permeability, wettability
• Well logging techniques:
  • Types (gamma ray, resistivity, neutron, density logs)
  • Data interpretation
• Seismic imaging:
  • 2D and 3D seismic surveys
  • Reservoir modeling and simulation
• Integrating data for optimal EOR design

6. Economic Evaluation of Enhanced Oil Recovery

• Capital expenditure (CAPEX) and operational expenditure (OPEX)
• Oil price sensitivity and market impacts
• Economic indicators:
  • Net Present Value (NPV)
  • Internal Rate of Return (IRR)
  • Payback period
• Risk assessment and uncertainty analysis
• Decision-making criteria for EOR project viability

7. Environmental Considerations in Enhanced Oil Recovery

• Environmental impacts of EOR techniques:
  • Greenhouse gas emissions
  • Water consumption and contamination risks
  • Soil and ecosystem disturbances
• Regulatory frameworks and compliance
• Strategies for environmental risk mitigation:
  • Emission control technologies
  • Water recycling and treatment
  • Spill prevention and management

8. Case Studies of Successful Enhanced Oil Recovery Projects

• Overview of global EOR projects:
  • North Sea EOR initiatives
  • Middle East thermal EOR projects
  • United States chemical flooding examples
• Techniques employed and rationale
• Challenges encountered and solutions implemented
• Outcomes and production improvements
• Lessons learned and best practices

9. Future Trends in Enhanced Oil Recovery

• Emerging technologies:
  • Nanotechnology applications in EOR
  • Advanced reservoir simulation and artificial intelligence
• Integration with renewable energy sources for sustainable EOR
• Research directions and pilot projects
• Potential impact on future oil recovery efficiency and environmental footprint