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Permanent link (DOI): https://doi.org/10.7939/R3GQ6R83V

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Displacement of Water by Gas in Propped Fractures: Effect of Fracture Fluid Surface Tension, Viscosity, Proppant Wettability and Gravity Open Access

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Other title
Subject/Keyword
Hydraulic Fracturing
Load recovery
Production enhancement
Gravity
Fracture cleanup
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Parmar, Jaskaran Singh
Supervisor and department
Kuru, Ergun (Civil and Environmental Engineering)
Dehghanpour, Hassan (Civil and Environmental Engineering)
Examining committee member and department
Babadagli, Tayfun (Civil and Environmental Engineering)
Kuru, Ergun (Civil and Environmental Engineering)
Bayat, Alireza (Civil and Environmental Engineering)
Dehghanpour, Hassan (Civil and Environmental Engineering)
Department
Department of Civil and Environmental Engineering
Specialization
Petroleum Engineering
Date accepted
2013-08-29T11:51:04Z
Graduation date
2013-11
Degree
Master of Science
Degree level
Master's
Abstract
Inefficient recovery of fracturing water used in multi-stage hydraulic fracturing operations is a growing industrial concern. Non-recovered water can be trapped in the tight rock matrix and/or in the complex fracture network. Trapped water can block the gas flow and damage the reservoir. This study reports results of various drainage experiments conducted to identify the factors controlling water displacement in propped hydraulic fractures. We conduct two sets of drainage experiments. First set of experiments are conducted by using a proppant packed column which is saturated with frac-fluid. These experiments are used to investigate the role of proppant and fluid characteristics on fluid recovery. Second set of drainage experiments are conducted in a physical fracture model. These experiments are designed to investigate the role of gravity, drawdown, surface tension and proppant wettability on fluid recovery. The results of this study suggest that gravity plays a dominant role in fracture cleanup and that water cleanup in fractures below well may be inefficient. Increasing the drawdown does not improve water recovery. Reducing surface tension and using treated hydrophobic proppant improves the sweep efficiency and in turn the load recovery.
Language
English
DOI
doi:10.7939/R3GQ6R83V
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
Parmar, J., Dehghanpour, H. and Kuru, E., “Unstable displacement: A missing factor in fracture fluid recovery”. SPE Canadian Unconventional Resources Conference, 30 October-1 November 2012, Calgary, Alberta, Canada. DOI:10.2118/162649-MSParmar, J., Dehghanpour, H. and Kuru, E., "Drainage Against Gravity: Factors Impacting the Load Recovery In Fractures". SPE Unconventional Resources Conference - USA, Apr 10 - 12, 2013 2013, The Woodlands, TX, USA. DOI:10.2118/164530-MS

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