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A Two-Phase Flowback Model for Multiscale Diffusion and Flow in Fractured Shale Gas Reservoirs
Joint Authors
Gao, Feng
Wang, Xiaolin
Wang, J. G.
Wang, Huimin
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-05-16
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
A shale gas reservoir is usually hydraulically fractured to enhance its gas production.
When the injection of water-based fracturing fluid is stopped, a two-phase flowback is observed at the wellbore of the shale gas reservoir.
So far, how this water production affects the long-term gas recovery of this fractured shale gas reservoir has not been clear.
In this paper, a two-phase flowback model is developed with multiscale diffusion mechanisms.
First, a fractured gas reservoir is divided into three zones: naturally fractured zone or matrix (zone 1), stimulated reservoir volume (SRV) or fractured zone (zone 2), and hydraulic fractures (zone 3).
Second, a dual-porosity model is applied to zones 1 and 2, and the macroscale two-phase flow flowback is formulated in the fracture network in zones 2 and 3.
Third, the gas exchange between fractures (fracture network) and matrix in zones 1 and 2 is described by a diffusion process.
The interactions between microscale gas diffusion in matrix and macroscale flow in fracture network are incorporated in zones 1 and 2.
This model is validated by two sets of field data.
Finally, parametric study is conducted to explore key parameters which affect the short-term and long-term gas productions.
It is found that the two-phase flowback and the flow consistency between matrix and fracture network have significant influences on cumulative gas production.
The multiscale diffusion mechanisms in different zones should be carefully considered in the flowback model.
American Psychological Association (APA)
Wang, Huimin& Wang, J. G.& Gao, Feng& Wang, Xiaolin. 2018. A Two-Phase Flowback Model for Multiscale Diffusion and Flow in Fractured Shale Gas Reservoirs. Geofluids،Vol. 2018, no. 2018, pp.1-15.
https://search.emarefa.net/detail/BIM-1158085
Modern Language Association (MLA)
Wang, Huimin…[et al.]. A Two-Phase Flowback Model for Multiscale Diffusion and Flow in Fractured Shale Gas Reservoirs. Geofluids No. 2018 (2018), pp.1-15.
https://search.emarefa.net/detail/BIM-1158085
American Medical Association (AMA)
Wang, Huimin& Wang, J. G.& Gao, Feng& Wang, Xiaolin. A Two-Phase Flowback Model for Multiscale Diffusion and Flow in Fractured Shale Gas Reservoirs. Geofluids. 2018. Vol. 2018, no. 2018, pp.1-15.
https://search.emarefa.net/detail/BIM-1158085
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1158085