Nodal Analysis - Well Inflow

In Oil Production

About this class

Well production mechanisms are one
of the most important things to understand when working at optimizing your
wells. Whatever if your well is in natural flow or if it uses artificial lift,
mastering the concepts of inflow and outflow will allow you to understand any
well behavior and optimize it.

In this class, reservoir
engineering, petroleum engineering and well performance will be put together to
give you strong and global understanding of the inflow mechanism. You will
learn all the key concepts to master how hydrocarbons flow from the reservoir
to the bottom of the well.

All parameters of the productivity
index formula will be discussed. Their evolution with reservoir production and
their impact on the well productivity will be explained.


This course connects reservoir
engineering to well performance and petroleum engineering. Participants will
learn about reservoir and fluid properties and get a deep understanding of the
inflow mechanism.


  • Productivity index formula, its
    units and different expressions
  • Productivity index in biphasic
  • Gas productivity index and well
    inflow formula
  • Characteristics of reservoir rock:
    • Porosity
    • Saturation
    • Permeability (absolute, effective and relative)
    • Oil-water relative permeability
    • Oil wet vs. water wet rock – Effect on relative permeability
    • Oil-gas relative permeability
    • 3 phase relative permeability
    • Anisotropy
    • All you need to know about coning. When is it a risk?
  • PVT and fluid properties:
    • Hydrocarbon phase diagram
    • Fluid models (black oil, volatile oil, wet gas, dry gas, retrograde
    • PVT experiments (flash and differential liberation) and fluid sampling
    • Bubble point pressure
    • Solution GOR (Rs)
    • Viscosity and its evolution vs. pressure and temperature
    • Formation volume factor
  • Drainage & well radius,
    reservoir thickness
  • The difference between drainage and
    investigation radius
  • Skin (geometrical, completion,
  • Deliverability curve (linear, Vogel
    and composite)
  • Free petroleum toolbox

Designed for:

  • Production, Petroleum or Well
    Performance Engineers to maximize their well production
  • Reservoir engineers to link
    reservoir engineering with well production
  • Field Production Personnel to
    understand the criticality of data
  • Completion or Surface Facilities
    Engineers to understand what they can do to help maximizing well production


  • Basic knowledge on well architecture

  • Awareness on the oilfield terms


  • Announcements

    Welcome!  This training course is the culmination of researching papers, manuals, and lessons learned from my years of experience in the field.  I have carefully selected the best material to help you grasp concepts quickly and retain them for years to come.

    Our courses go through a continuous improvement process, which is critical for ensuring industry best practices and topics remain relevant with technological advancements.  Your feedback also plays a vital role in the process.  Thus, we welcome your thoughts on the course and encourage your input for future improvement of this training course.

    Thank you for purchasing this course.

  • Tips for online training
  • Illustrations to download

    Print these slides and use them to take notes along the videos.

  • 01-Two systems
  • 02-Productivity index
  • 03-Productivity index units
  • 04-J function variations
  • 05-Biphasic productivity index
  • 06-Gas productivity index
  • 07-Gas well inflow formula
  • 08-Characterisation of reservoir rock
  • 09-Porosity and saturation
  • 10-Permeability
  • 11-Absolute, effective and relative permeability
  • 12-Permeability typical values
  • 13-Oil water relative permeability
  • 14-Water wet and oil wet rock
  • 15-Gas oil relative permeability
  • 16-3 phase relative permeability
  • Quiz 1
  • 17-Anisotropy and coning
  • 18-Phase diagram
  • 19-Retrograde regions
  • 20-Fluid model
  • 21-Bubble point pressure and PVT
  • 22-Bubble point and Rs
  • 23-Viscosity
  • 24-Viscosity visualisation
  • 25-Viscosity evolution with P and T
  • 26-Formation volume factor and GOR
  • 27-FVF evolution with pressure
  • 28-Drainage & well radius, reservoir thickness
  • 29-Drainage vs. investigation radius
  • Quiz 2
  • 30-Investigation radius exercise solution
  • 31-Skin
  • 32-Geometrical skin
  • 33-Deliverability curve linear model
  • 34-Deliverability curve Vogel model
  • 35-Deliverability curve Composite model
  • 36-Free petroleum production application
  • Quiz 3
  • Conclusion

    Congratulations, you have reached the end of the training. 

    We hope you enjoyed the learning experience. Please don't hesitate to send us your comments and feedback to help us improve the experience.  

    Thank you for purchasing this course, and don't forget to check out our other training content.

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