N353 An Introduction to Reservoir Evaluation

Course Facts

Course Code:
5 days
4.0 Continuing Education Units
40 Professional Development Hours
Certificate Issued Upon Completion


The course teaches the principles and techniques necessary for a geoscientist to work effectively within a multi-disciplinary field development team. Emphasis is placed on the fundamentals of appraisal, field development planning and reservoir management, supported by field case studies.  On completion, participants will understand the multi-disciplinary nature of the workflows that underpin oil and gas field development projects. 

Duration and Training Method

A five-day classroom course.  Case studies and exercises regularly punctuate the lectures.

Participants will learn to:

  1. Demonstrate the use of routine core analysis data to measure and understand the controls on porosity and permeability, including the affects of depositional and diagenetic processes in clastics and carbonates.
  2. Apply special core analysis data to understand concepts of capillary pressures, rock wettability and relative permeability. Also, to relate these rock properties to the estimation of hydrocarbon saturation and column height, seal capacity and pore-scale fluid displacement.
  3. Determine hydrocarbon-water contacts and understand how these vary in response to different fluid types and rock properties.
  4. Analyze the PVT relationship of reservoir fluids and demonstrate how variability in fluid properties impacts on field development planning and production.
  5. Analyze reservoir energy and drive mechanisms and their effect on reservoir performance and hydrocarbon recovery.
  6. Examine the principles of reservoir management including well pattern options, production forecasting and uncertainty.
  7. Demonstrate the use of 3D static reservoir models and examine the role of input parameters, especially depositional controls on reservoir quality distribution, in calculating deterministic and stochastic hydrocarbon-in-place estimates.
  8. Distinguish flow and non-flow lithological units (net pay versus non-pay) and the role of reservoir heterogeneities, including barriers and baffles, for dynamic reservoir simulation. Relate these to stratigraphic and structural processes.
  9. Verify size limitations on dynamic simulation models and the main techniques for the effective up-scaling of geological data.
  10. Contrast field appraisal and development strategies using different case studies, including volumetric and economic considerations and the effectiveness of multi-disciplinary teams to optimize production throughout field life.

The class covers the broad spectrum of activities of a multi-disciplinary team, but with emphasis on the geoscience aspects and their applications:

  • Determining the volume of the reservoir and contained fluids and conveying the uncertainty in those quantities.
  • Evaluating and describing the reservoir from the pore-scale through to the  full field-scale in order to optimize sweep efficiency, well design, production performance and ultimate recovery.
  • Key processes in field life: appraisal, well planning, field development, reservoir management and corporate reserves reporting.


  • Aims and schedule ~ Hydrocarbon resources ~ Reserves growth ~ Necessary skills ~ Teams and the field life cycle


  • Technology-led development of a low-perm carbonate reservoir in an onshore field, emphasizing recovery process and well design
  • Review of the history of a small onshore field with low recovery from tight sand: what would you do, starting over?
  • Application of 4D to extend the life of a large offshore field with high-quality reservoir


  • Properties of pore systems ~ Sandstone and carbonate pore types ~ Darcy’s Law ~ Core analysis ~ Care with core ~ Corrections to in situ ~ Interpreting porosity vs. permeability plots ~ Capillary pressure ~ Wettability ~ Relative permeability ~ Electrical properties and the Archie equation ~ Acoustic properties and the seismic response



  • Reservoir fluids ~ PVT ~ Reservoir energy ~ Drive mechanisms, performance and recovery factor ~ Global RF ~ 1-RF ~ Well patterns ~ Reservoir simulation ~ Production forecasts and uncertainty ~ Reservoir management


  • Reservoir mapping ~ 3D geocellular models ~ Volumetrics ~ NTG and saturation ~ Uncertainty reduction in appraisal ~ Reserves vs. time ~ Correlation ~ Layering and flow units ~ Heterogeneity ~ Averaging ~ Pseudo relative permeability ~ Upscaling ~ Fractured reservoirs ~ Types and recovery processes ~ Fracture porosity ~ Discrete fracture network modelling


  • Well costs ~ Drilling hazards and the geoscientist ~ In-situ stress ~ Well planning ~ New technology ~ ERD ~ Rotary steerable ~ Multi-laterals ~ UBD ~ Smart wells ~ Expandables


  • Appraisal strategy, planning and economics ~ Value of information ~ Reserves classification ~ Future trends ~ Summaries and conclusions

Who should attend

The target audience for the course are those geoscientists who have not worked in development but require a broad introduction to this area of the business.


Prerequisites and linking courses

N353 in North America and its European equivalent N008 are the key Basic Application Competence Level courses within our Reservoir Development portfolio. Anyone attending N353 or N008 should also consider taking N095 (Integrating Core and Log Data for Reservoir Characterisation) in Europe or N305 (Core Facies Analysis for Conventional and Resource Plays) in North America. To develop a deeper understanding of topics addressed in N353 and N008, consider taking a range of Skilled Application Competence Level classes, including N012 (Reservoir Modelling Field Class, Utah, USA) and N022 (A Critical Guide to Reservoir Appraisal and Development). The reservoir engineering topics in N353 and N008 are dealt with in more detail in N006 (An Introduction to Reservoir Engineering for Geoscientists).

Click on a name to learn more about the instructor

Martin Cassidy