Gas EOR in Tight Unconventionals

Disciplines: Reservoir

Course Description

Gas-based EOR in tight unconventionals is a growing application to tap the vast unproduced oil and condensate resources in liquid-rich shale basins. The Huff-n-Puff process now involves several hundred wells in the Eagle Ford, and pilots are planned or ongoing in all other liquid-rich basins (Bakken, Permian, and Montney).

The course will discuss the Huff-n-Puff gas EOR process specifically, but will also address relevant fundamentals of displacement-based gas EOR methods (miscibility, vaporization, and displacement) in tight unconventionals.



  • Introduction to Unconventional gas EOR
  • Summary of gas EOR methods and recovery mechanisms
  • What makes unconventional gas EOR different than conventional?
  • Huff-n-Puff process
  • Miscibility, PVT and injection gas selection relevant to H-n-P process
  • Review ongoing industry gas EOR projects in North America unconventionals
  • Operational considerations including compressor requirements
  • Gas containment issues
  • Basic gas EOR economics for unconventionals
  • Reservoir modeling strategies
  • Alternative-to-HnP/Displacement EOR processes in tight unconventionals
  • Pre-worked example problems with Q&A and discussion


Learning Level


Course Length

1 day

Why Attend

To learn about and share experiences in gas EOR in tight unconventionals. The course material is made available to registrants. The instructor has worked on a number of commercial gas EOR projects in tight unconventionals.

Who Attends

Reservoir engineers, production and completion engineers, process engineers (facilities), EOR technical management, and regulatory professionals.


.8 for 1 day course or 1.6 CEUs (Continuing Education Units) are awarded for a 2-day course.

Additional Resources

This course has a supplemental book located in our SPE Bookstore entitled Unconventional Gas and Tight Oil Exploitation. Please check out this valuable resource!

Cancellation Policy

All cancellations must be received no later than 14 days prior to the course start date. Cancellations made after the 14-day window will not be refunded. Refunds will not be given due to no show situations.

Training sessions attached to SPE conferences and workshops follow the cancellation policies stated on the event information page. Please check that page for specific cancellation information.

SPE reserves the right to cancel or re-schedule courses at will. Notification of changes will be made as quickly as possible; please keep this in mind when arranging travel, as SPE is not responsible for any fees charged for cancelling or changing travel arrangements.

We reserve the right to substitute course instructors as necessary.


Mathias Lia Carlsen

Mathias Carlsen is General Manager for Americas at Whitson, a company that develops all-in-one, web-based, petroleum engineering platform named Whitson+. After earning his MSc Carlsen joined Whitson and has been a key developer, conceptual driver and product manager of Whitson+ for unconventional reservoir model management. 

Through Whitson, Carlsen has also supervised and consulted on projects for more than 50 E&P companies. In addition he researches and teaches industry courses on well performance, advanced pressure, volume and temperature (PVT) studies, phase behavior and gas-based enhanced oil recovery.

Carlsen holds an MSc degree in Petroleum Engineering from the Norwegian University of Science and Technology and was a Fullbright Scholar at Stanford University.

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