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A Comparative Study of Flowback Rate and Pressure Transient Behaviour in Multifractured Horizontal Wells Open Access


Other title
Hydraulic Fracturing
Multifractured Horizontal Wells
Shale Gas
Tight Oil and Gas
Flowback Analysis
Type of item
Degree grantor
University of Alberta
Author or creator
Abbasi, Majid A
Supervisor and department
Dehghanpour, Hassan (Civil and Environmental Engineering)
Examining committee member and department
Dehghanpour, Hassan (Civil and Environmental Engineering)
Kuru, Ergun (Civil and Environmental Engineering)
Gul, Mustafa (Civil and Environmental Engineering)
Department of Civil and Environmental Engineering
Petroleum Engineering
Date accepted
Graduation date
Master of Science
Degree level
Tight reservoirs stimulated by multistage hydraulic fracturing are commonly characterized by analyzing the hydrocarbon production data. However, analyzing the hydrocarbon production data can best be applied to estimate the effective fracture-matrix interface, and is not enough for a full fracture characterization. Before flowback, the induced fractures are filled with the compressed water. Therefore, analyzing the early-time rate and pressure of fracturing water and gas/oil should in principle be able to partly characterize the induced fractures, and complement the conventional production data analysis. We develop an analytical model to compare the pressure/rate transient behaviour of multifractured horizontal wells (MFHW) completed in one tight oil and two tight gas wells. We also construct a series of diagnostic plots to study the flowback behaviour of 18 MFHW completed in the Horn River basin. We observe unique signatures that suggest initial free gas in the fracture network before starting the flowback operation.
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.
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