Water-Alternating-Gas Injection

Level: Intermediate/Advance

Upcoming Sessions:

To Be Determined
Please Contact Us at tahmed@mtech.edu for more information
Instructor: Dr. Tarek Ahmed

Designed for:

Course is suitable for reservoir and production engineers, managers, G&G Staff, and chemical engineers.

Course Overview:

The course is designed to give a comprehensive treatment of the fundamentals and principles of various enhanced oil recovery processes with a focus on Immiscible & Miscible WAG flood. A wide variety of topics will be presented during the course including miscible and immiscible gas injection, and other flooding scenarios. The current status of these technologies is discussed and guidelines are presented for initial screening for each process corresponding to particular field conditions.

Hands-on exercises are utilized through the course for participants to gain a better understanding of the subject under discussion with a total of 12 exercises that covers all topics in addition to several reservoir simulation studies that participants will perform in a team-setting format.

Course Content:
  • Stages of Oil Recovery
  • Screening Criteria
    • Selection of IOR Methods
  • Factors to Consider When Planning an IOR
  • Required PVT Data for IOR Studies
  • QC PVT Data before Use in Modeling
    • Exercise #1: QC PVT data (use of actual PVT data)
  • Capillary Pressure and Relative Permeability Concepts
  • Normalization of Relative Permeability
    • Exercise #2: Normalizing a set of Rel. Perm. Data
  • Relative Permeability Hysteresis Models
    • Land’s Trapping Coefficient
    • Carlson’s Model
    • Killough’s Model
    • Impact on WAG Flood Recovery
      • Exercise #3: Generating 3-phase rel. perm
  • Controlling Flooding Parameters
    • Capillary Number
    • Viscous Fingering
    • Flow regimes
    • Gravity override and Underride
  • Introduction to Secondary Recovery Methods
    • Basic Waterflood Theory
    • Flooding Patterns
    • Sweep Efficiencies
    • Role of Mobility Ratio
    • Pattern Balancing
      • Exercise #4: Sweep efficiency calculations
      • Exercise #5: Pattern balancing calculations
  • Frontal Advance Equation
    • Buckley-Leverett Frontal Advance Theory
    • Water Saturation Profile and Water Breakthrough
    • Gas Fillup Volume
    • Performance of Waterflooding
      • Exercise #6: waterflood recovery calculations
      • Exercise #7: field development using an in-house simulator
  • Improved Water Injection Methods
    • Polymer Food
    • Low-Salinity Water Flood
    • Improved Water Flood in Heterogeneous Reservoirs
  • WAG Flood
    • Immiscible WAG Flood
    • Optimum WAG Slug size
    • Estimation of Solvent-Water Ratio
  • Evaluation of Oil Recovery by WAG Injection - Oil-Wet & Water-Wet Systems
    • Exercise #8: Optimum WAG ratio calculations
    • Exercise #9: Simulation of Immiscible WAG using SPE Comparative Study Data
  • Multi-Contact Miscible Flood
    • Nitrogen Injection
    • Lean Gas Injection
    • Air Injection in Light Oil Reservoir
    • Miscible WAG Flood
    • CO2 Injection
      • Exercise #10: Review of CO2 case study
  • First Contact Miscible and Chemical Flood
    • ASP Flood
    • ASP-WAG Flood
    • Buffer Zone Design
    • Micellar Flood
    • LPG
    • Surfactant Flood
    • Surfactant-WAG Flood
    • Micellar Flood
      • Exercise #11: The Carsen Field Simulation. Participants are required to perform simulation study for field development from the primary depletion stage to enhanced recovery stage. Participants will be divided into teams
  • Basic Flooding Surveillance Techniques
    • Water-cut Analysis
    • Voidage-Replacement-Ratio
    • Monitoring layering performance
    • Bubble Maps
    • The ABC Plots
    • Step-Rate-Testing
    • Hall Plot
    • The X-Plot
      • Exercise #12: Teams Presentation