HOT Engineering Exploration Development Consulting Training Reservoir Services

Special Core Analysis (RE14)

    Nov 16-20, 2014 Dubai, UAE Course Fee: USD 4990
Computer Fee: USD 250
    Apr 12-16, 2015 Doha, Qatar Course Fee: USD 5150
Computer Fee: USD 250
    May 4-8, 2015 Vienna, Austria Course Fee: EUR 3590 plus VAT
Computer Fee: EUR 250 plus VAT
    Nov 15-19, 2015 Dubai, UAE Course Fee: USD 5150
Computer Fee: USD 250

Course Level: Intermediate

Instructor: Jess Stiles

The extensive use of reservoir simulation in the evaluation, development and management of oil fields is placing increased importance on the correct use of results from special core analysis, particularly those from relative permeability tests.
Correct use of these data requires knowledge of the history of the core, including the drilling mud used during coring as well as how it was handled on its way to and in the laboratory. As a consequence the course covers such topics as coring operations and core preservation techniques. Laboratory measurement methods are also addressed, since results are affected by the techniques used and the test conditions.
Results that are considered valid require adjustment and refinement and an understanding of laboratory techniques is needed to do this since each method has its own strengths and weakness. The reasons why steady-state and unsteady state waterflood results are often different are explained in this way.  There is emphasis throughout the course on identifying invalid or questionable data and making the necessary refinements to the data which are considered to be valid.
A comprehensive manual accompanies the course which includes numerous examples from the North Sea and elsewhere in the world.


The course is aimed at reservoir engineers involved with reservoir simulation and/or classical hand calculations, but will also be of great value to supervisors and managers who review simulation results carried out by others. Laboratory personnel involved with SCAL measurements will find the course useful in learning how their results are used and in gaining insight into how laboratory programmes might be improved.
Production geologists and petrophysicists working in integrated teams will also find the course valuable, particularly in selecting samples for analysis and assisting in relating relative permeability and capillary pressure to rock type.


  • Carry out a systematic review of a laboratory report and differentiate results that are clearly invalid from those that may be reliable
  • Define the strengths and weaknesses of the various laboratory measurement techniques and identify which portions of reported relative permeability curves are likely to require refinement
  • Analyse and evaluate reported relative permeability curves and make necessary adjustments and refinements
  • Relate relative permeability results to rock types
  • The course will also prepare engineers, geologists and petrophysicists to formulate a special core analysis program for a new well or field


  • Introduction
    - Uses and importance of accurate special core analysis results in reservoir engineering calculations
    - Key - challenges in using results
  • Validating SCAL Data
    - What to look for during review of SCAL reports
    - A systematic approach to data validation
    - Review checklists
  • Wettability
    - Wettability concepts and measurement techniques
    - Types of wettability
    - Factors which effect reservoir wettability and how natural wettability can inadvertently be altered during core handling
    - Wettability restoration
  • Using Of Capillary Pressure To Define Connate Water Saturation
    - Measurements techniques
    - Systematic analysis of results
    - Adjusting laboratory data to reservoir conditions
    - Relating capillary pressure data to height above original oil-water contact
  • Water-Oil Relative Permeability
    - Measurement methods and techniques
    - Wettability considerations
    - Importance of test procedures and test conditions
    - Special problems with intermediate wettability reservoirs
    - Refining laboratory results. Integrating, grouping and averaging
    - Hysteresis in water-oil relative permeability
  • Gas-Oil Relative Permeability
    - Measurements techniques
    - Differences between gas-oil and water-oil data
    - Critical gas saturation
    - Efficient gravity drainage mechanism and extending oil relative permeability curves
  • Reservoir Characterisation
    - Examples of relationships between relative permeability and other rock characteristics
    - Characterisation techniques for differentiating rock types and assigning results to those rock types
  • Residual Oil Saturation
    - Ambiguity and alternative definitions
    - Difficulties in determining
    - Estimating from relative permeability data
    - Effect of wettability
  • Exercises
    - Analysis and refinement of water-oil relative permeability data
    - Analysis and refinement of gas-oil relative permeability data
    - Analysis and use of primary drainage capillary pressure data
    - Identifying intervals with different rock types from routine core analysis data