Routine and Special Core Analysis

Program Objectives

This 5-day course teaches the fundamental concepts of core analysis and coring techniques. The course addresses the coring fluids, coring methods, well site core preparation and preservation, and provides procedures for laboratory measurements. Different types of methods of coring are discussed: whole cores vs. core plugs vs. sidewall cores. The advantages and disadvantages of native state cores vs. restored state cores are discussed. Methods of core preparation are discussed. Also, the course teaches how to prepare samples and perform measurements for routine core analysis measurements for porosity, permeability, fluid saturations. Special core analysis techniques are also discussed with a special focus on steady-state and unsteady state relative permeability, capillary pressure measurements using mercury injection and centrifuge methods. Amott tests and USBM methods to determine wettability are discussed with a special focus on their merits and demerits. The course concludes with methods and protocols of coreflooding tests for waterflooding and EOR measurements.
Course Outline
Day 1
  • Introduction 
    • Objectives 
    • Application of Core Data 
    • Types of Core Data 
Day 2
  • Coring and Core Preparation
    • Coring Fluid 
    • Coring Method 
    • Well Site Core Preparation and Preservation 
    • Laboratory Core Preparation 
Day 3
  • Types of Cores
    • Whole Core vs. Core Plugs and Sidewall Core
    • Native-State Core 
    • Restored-State Core (core cleaning and wettability restoration)

Day 4
  • Routine Core Analysis
    • Core Preparation
    • Permeability (Gas and liquid permeability, Klinkenberg corrected gas permeability, data processing) 
    • Porosity (gas expansion, gravimetric method, data processing) 
    • Fluid Saturation 
    • Bulk and Grain Density 
    • Effect of overburden stress 
    • QC of Core Data 
Day 5
  • Special Core Analysis
    • Relative Permeability (steady-state and unsteady state) 
    • Capillary Pressure (mercury injection, centrifuge)
    • Wettability (Amott method, USBM method, USBM/Amott method, effect on waterflooding recovery) 
    • Core Flooding Tests (waterflooding and EOR recovery determination, formation damage evaluation) 
    • QC of Test Results