Numerical analysis of the material parameter effects on the initiation of hydraulic fracture in a near wellbore region

Li, Quanshu and Xing, Huilin (2015) Numerical analysis of the material parameter effects on the initiation of hydraulic fracture in a near wellbore region. Journal of Natural Gas Science and Engineering, 27 Part 3: 1597-1608. doi:10.1016/j.jngse.2015.10.023


Author Li, Quanshu
Xing, Huilin
Title Numerical analysis of the material parameter effects on the initiation of hydraulic fracture in a near wellbore region
Journal name Journal of Natural Gas Science and Engineering   Check publisher's open access policy
ISSN 1875-5100
2212-3865
Publication date 2015-10-28
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jngse.2015.10.023
Open Access Status Not yet assessed
Volume 27
Issue Part 3
Start page 1597
End page 1608
Total pages 12
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Collection year 2016
Language eng
Abstract Hydraulic fracturing is recognized as a key method to enhance unconventional reservoirs, but it is also quite complicated and challenging due to so many affecting factors such as the formation material parameters, fluid behaviors and geological setting/conditions. However, in unconventional reservoirs, in the near wellbore region, the rock may consist of different materials, and the stress is redistributed during drilling and fracturing process, so the preferable hydraulic fracture path is hard to predict. This paper aims to study the effects of formation material parameters, including drilling effects, on the hydraulic fracturing process in unconventional reservoirs. First, hydraulic fracturing has been simulated in nine cases with different parameters specifically permeability, porosity, Young's modulus, and Poisson's ratio. Then hydraulic fracturing has been studied by a heterogeneous model with multiple zones and layers, and complex stress condition. It is found that under a constant hydraulic pressure boundary, when the values of permeability, porosity, Young's modulus, and Poisson's ratio are higher, hydraulic fracturing initiates earlier; with a heterogeneous distribution of materials, stress concentration is formed between different materials, and the tensile stress concentrated areas become the preferable paths of hydraulic fracturing.
Keyword Hydraulic fracturing
Near wellbore
Stress-fluid coupling
Heterogeneity
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2016 Collection
 
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