Displacement of Water by Gas in Propped Fractures: Effect of Fracture Fluid Surface Tension, Viscosity, Proppant Wettability and GravityReport as inadecuate




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Hydraulic Fracturing, Load recovery, Production enhancement, Gravity, Fracture cleanup

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.





Author: Parmar, Jaskaran Singh

Source: https://era.library.ualberta.ca/



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