SPE Online Education
EOR While Fracturing: Unconventional Rock-Fluid Interactions
Includes a Live Event on 06/15/2020 at 4:00 PM (EDT)
Unconventional oil production using horizontal drilling and multi-stage hydraulic fracturing has pushed the U.S. crude supply to over 10% of global production. However, only 5-10% of the original oil in place is typically recovered after massive fracturing operations. What is the next boom in development of unconventional resources? More aggressive drilling and fracturing or more effective techniques to recover the remaining oil using existing wells? Combined analyses of early-time production data and laboratory results suggest that well performance is influenced by rock-fluid interactions during extended shut-in periods after fracturing operations. Therefore, optimizing fracturing fluid formulation and operational parameters such as injected fluid volume and shut-in time can lead to enhanced oil recovery while fracturing. Laboratory analysis of downhole cores show that the residual oil is mainly trapped in porous organic matter, which is strongly water repellent. Recently, surfactants and nano-sized particles have been designed as fracturing additives to change rock wettability towards more water-wet conditions. Field examples show that using such additives in fracturing water can improve well productivity after extended shut-in periods. Alternatively, visualization experiments show that CO2 and natural gas can diffuse into and swell or vaporize the oil trapped in the organic pores. Such mechanisms can explain the success of recent huff-n-puff operations using natural gas or CO2 in some unconventional reservoirs.
All content contained within this webinar is copyrighted by Dr. Hassan Dehghanpour and its use and/or reproduction outside the portal requires express permission from Dr. Hassan Dehghanpour.
Dr. Hassan Dehghanpour
Associate Professor, Department of Civil and Environmental Engineering, University of Alberta
Dr. Hassan Dehghanpour is an associate professor in the Department of Civil and Environmental Engineering at the University of Alberta. His primary research interests include measurement and modeling of multiphase flow through porous media for EOR applications in unconventional reservoirs. Hassan has authored more than 100 refereed-journal and conference papers in this area. He is the recipient of the 2014 SPE Young Member Outstanding Service Award and the Canadian Region 2015 SPE Distinguished Achievement Award for Petroleum Engineering Faculty. He has served on the program committee of several SPE conferences, and is currently an associate editor of the Journal of Petroleum Science and Engineering. Hassan holds two bachelor’s degrees (in mechanical and petroleum engineering) from Sharif University of Technology, and a master’s degree from the University of Alberta and a PhD degree from the University of Texas at Austin, both in petroleum engineering.
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