A Sustainable Approach for Enhanced Liquid Yield in Shale Reservoirs
This presentation explores the observed strong correlation between liquid yield (Condensate Gas Ratio) profiles and drawdown management in shale gas condensate wells. The practical information shared in this talk provides a framework to develop optimum drawdown strategies that contribute to maximized condensate recovery at the surface.
Forecasting of condensate production for liquid-rich wells in nano-Darcy reservoirs is a challenge due to its deviation from conventional expectations suggested by classical PVT, with variations even when the well is operating above the saturation point. Multiple hypotheses have been introduced in the recent years to explain the anomaly. This study looks at how drawdown strategy has a direct and key impact on CGR.
In this investigation, production profiles of over a hundred wells in the Eagle Ford and Duvernay were analyzed. It was observed that when the well is operated at pressures above the saturation point, a slow drawdown promotes a stabilized CGR value (at CGRi). However, a fast drawdown strategy that follows a rapid choke ramp-up from the onset of production causes a declining trend for CGR that later stabilizes once the minimum flowing bottom hole pressure (FBHP) is reached.
The relationship between drawdown strategy and CGR trend discussed in this presentation is a valuable information that can be leveraged in optimization of field development design and operations. Take away: CGR tracks FBHP. Consequently, effective drawdown management is essential for improving the condensate production and revenue generation.
Registration closes on Tuesday, September 9th at 8AM MDT.
Date/Time
Wednesday, September 10, 2025
Registration: 11:45 AM MDT
Start Time: 12:00 PM MDT
End Time: 1:00 PM MDT
Location
Calgary Petroleum Club | 319 5 Ave SW, Calgary, AB, T2P 0L5
*This event will be in-person only, and will not be recorded.
Speaker Bio
Yalda Barzin, PhD
Reservoir Engineering Advisor, ExxonMobil
Yalda Barzin is a Reservoir Engineering Advisor with 20 years of experience in diverse aspects of reservoir engineering. She started her career at Fekete Associates and advanced to become a recognized authority in the field of modern production data analysis (RTA), bringing a multitude of practical experience from most unconventional plays in the US, Canada, and South America.
She has received several accolades for teaching industry and academic courses and workshops in three languages around the globe. Yalda has authored over 20 technical papers in the areas of Enhanced Oil Recovery (EOR), PVT, naturally fractured reservoirs, Rate Transient Analysis (RTA); and field development and production optimization of the unconventional reservoirs. Her award-winning publications are frequently cited in the industry and academic journals.
Yalda holds a PhD and an MSc degree in petroleum engineering from the University of Calgary in Canada and IFP-School in France, respectively. She is currently a reservoir engineering advisor with ExxonMobil’s Unconventional development strategy and quality assurance organization.
**Please Note
Lunch will be served. Please be sure to include your dietary restrictions during the online registration process so we can do our best to accommodate.
An event reminder will be sent the day before and the morning of the event.