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CHOA Partner Event: Applications of Rate and Pressure Transient Analysis in Huff-n-Puff Gas EOR for Unconventional Reservoirs

January 26 @ 10:00 am - 11:00 am

Applications of Rate and Pressure Transient Analysis in Huff-n-Puff Gas EOR for Unconventional Reservoirs

Gas injection huff and puff (HnP) has been successfully applied in parts of Eagle Ford over the past few years. The success is attributed to gas and oil miscibility achieved by injection of gas at high pressure and rate in a contained hydraulic fracture system with a considerable stimulated volume. Two key preliminary steps in gas HnP modeling include characterization of reservoir fluid (and its interaction with injected gas) and evaluation of hydraulic fracture system. This study focuses on applications of simplified analytical tools in characterization of multi-fractured horizontal wells and estimation of stimulated reservoir size.
Rate-transient analysis (RTA) is a tool for identification of flow regimes and estimation of key performance metrics for multi-fractured horizontal wells. The flow regimes include enhanced fractured region (EFR), bilinear flow, transient linear flow, transitional flow, and boundary-dominated flow. In this study, the size of stimulated rock and total effective fracture area are estimated using an RTA method. Furthermore, diagnostics fracture injection tests (DFITs) and pressure buildup tests are used to characterize the multi-fractured horizontal wells for the purpose of gas EOR evaluation. Pressure interference tests are also used to quantify the conductivity of connecting fractures between communication wells. The methods are applied to field cases from Montney and other unconventional formations in North America and the results are presented.
This study helps the engineers and managers with reservoir and hydraulic fracture characterization and the screening process for gas HnP candidates. The outputs of these methods serve as first pass of SRV size for more detailed numerical modeling studies.
PRESENTER: Farhad Qanbari, Seven Generations Energy.


10:00 – 10:45     Technical Presentation

10:45 – 11:00     Q&A

This is a webinar event. After completing this first step registration, you will receive a link by e-mail to register for the webinar virtual room.

We kindly ask you if you are not able to participate on the day of the event, please send us a message in advance to cancel your registration. We work with a limited capacity for our webinars and you will be giving your seat to another person who was not able to register if the event is sold out.


Limited availability. Registration will close on January 25, 2021 at 15:00.



January 26
10:00 am - 11:00 am
Event Category: