Drive Mechanisms - Enhanced Oil Recovery

Material Balance


Who should attend?

  • This course provides an in-depth understanding of reservoir drive mechanisms and Enhanced Oil Recovery (EOR) methods and corresponding recovery performances.
Audience :
  • Newly-hired and 2- to 3-year experienced reservoir engineers willing to deepen their knowledge in drive mechanisms and Enhanced Oil Recovery methods. It is also intended for geoscientists, petroleum and production engineers moving towards reservoir engineering.

Level : Proficiency

Course Content


      • Oil reservoirs:
      • Undersaturated oil expansion.
      • Solution gas drive.
      • Gas gap drive.
      • Natural water drive.
      • Analytical aquifer models.
      • Hurst & Van Everdingen model.
      • Carter-Tracy model.
      • Gas reservoirs with and without aquifer.
      • Material balance:
      • Principles and equations.
      • Generalized material balance.
      • Drive index.
      • Campbell and cole plots.
      • Application: estimating recovery factors from material balance, checking aquifer and gas cap size, checking accumulation estimate…

      • Reminders about multiphase flow in the reservoir: wettability, capillarity, relative permeability.
      • Water and non-miscible gas injection:
      • Principles.
      • Sources of fluid, well injectivity, injectors pattern.
      • Expected performance of water and gas injection.
      • Multiphase flow stability and influence of mobility ratio.
      • Diffusive flow:
      • Buckley-Leverett frontal displacement theory.
      • Welge method.
      • Sweep efficiency:
      • Displacement or microscopic efficiency.
      • Areal efficiency.
      • Vertical efficiency.
      • Cycling.

      • Practical exercises on synthetic and real field case data using MBAL™ software:
      • PVT and reservoir parameters history match.
      • Production forecast.

      • Principles and mechanisms of main EOR methods:
      • Chemical flooding.
      • Miscible gas injection.
      • Thermal flooding.
      • EOR projects:
      • Screening criteria.
      • Economics.
      • Application - Field cases.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • discuss the natural mechanisms of production of Oil & Gas reservoirs and their corresponding expected performance,
  • discuss the mechanisms of secondary recovery through water injection and non-miscible gas injection and their related expected performance,
  • list the main Enhanced Oil Recovery methods and discuss their mechanisms and corresponding expected performance,
  • describe typical EOR projects workflow and related screening criteria and economics,
  • carry out simple material balance calculations for matching reservoir parameters/forecast recovery.

Ways & Means

  • Interactive lectures and exercises.
  • Real field case studies.
  • Hands-on practices using MBAL™ dedicated industrial software for PVT matching, history matching and production forecast through material balance.