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Managing Mature Oilfields with Capacitance-Resistance Modelling
Rajan Chokshi, PhD
INSTRUCTORS: Larry W. Lake, PhD and Jerry Jensen, PhD
DISCIPLINE: Engineering, Geoscience
COURSE LENGTH: 2 Days (Classroom) / 3 Four-Hour Sessions (Live Online)
CEUS: 1.6
AVAILABILITY: Public, In-House, & Live Online 
SAMPLE TOPIC FROM THE CLASS: "Why a No-Geology Model Helps Us Understand Geology"

WHO SHOULD ATTEND: Engineers and geoscientists with a BS degree and with 2 or more years’ experience in managing and/or developing mature oil fields. Students should have basic proficiency in Excel and bring their own laptop.

COURSE DESCRIPTION: Developing and managing mature oil fields can have many challenges. Ideally, a history-matched reservoir simulation model using a comprehensive reservoir model will guide choices, such as well locations and water injection rates. Many fields, however, lack such tools and need simpler, less sophisticated methods to improve results. This is where the capacitance-resistance model (CRM) can help.

The CRM evaluates injector-producer connectivity using injector and producer flow rates and bottom hole pressures (if available). It is a simplified model capturing the effects of injection on production and does not require any geological model to operate. Results can be used to adjust injection rates, identify fluid escape, and compare with geological information. CRM results can also help reservoir simulation model development.

This course provides prospective users with the knowledge to use the CRM and apply its results to manage mature fields. Through numerous field examples, we show how the CRM can be applied and the results interpreted. Both engineers and geoscientists will see how the results can help their challenges.


  • Introduce CRM method.
  • Describe CRM versions and their advantages.
  • Illustrate CRM capabilities.
  • Provide case studies showing applications.


  • CRM basics and variations (2.5 hours)
    1. Basic flow equations
    2. CRMT + exercise
    3. CRMP + spreadsheet demo
    4. CRMIJ
    5. ICRM
  • CRM uncertainty (1 hour)
    1. Data sufficiency and CM number
    2. CRM parameter sensitivities to noise and well interventions
    3. CRM behavior
  • Applications 1 (0.5 hour)
    1. Primary recovery
    2. Flow capacity curves
    3. Tracers and CRM
  • CRM modified versions (1.5 hours)
    1. Segmented
    2. Compensated
    3. Pseudo well
  • Applications 2 (1.5 hours)
    1. Application to CO2 flooding
    2. Oil production modelling
      1. Gentil model
      2. Koval model
  • Percolation basics (1 hour)
    1. Percolation – relevance to reservoir behavior
    2. Non-linear behavior of connectivity
    3. Geological uncertainty and effects on connectivity
    4. Example cases
  • Case studies (4 hours)
    1. Comparison to seismic
    2. Summary methods to check CRM results
    3. Integration with geology
      1. Heavy oil waterfloods
      2. Conventional floods
      3. Tight oil waterfloods