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Numerical modeling of hydraulic fracture propagation, closure and reopening using XFEM with application to in-situ stress estimation

Mohammadnejad, T. and Andrade, J. E. (2016) Numerical modeling of hydraulic fracture propagation, closure and reopening using XFEM with application to in-situ stress estimation. International Journal for Numerical and Analytical Methods in Geomechanics, 40 (15). pp. 2033-2060. ISSN 0363-9061. https://resolver.caltech.edu/CaltechAUTHORS:20161111-083143784

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Abstract

In this paper, a fully coupled model is developed for numerical modeling of hydraulic fracturing in partially saturated weak porous formations using the extended finite element method, which provides an effective means to simulate the coupled hydro-mechanical processes occurring during hydraulic fracturing. The developed model is for short fractures where plane strain assumptions are valid. The propagation of the hydraulic fracture is governed by the cohesive crack model, which accounts for crack closure and reopening. The developed model allows for fluid flow within the open part of the crack and crack face contact resulting from fracture closure. To prevent the unphysical crack face interpenetration during the closing mode, the crack face contact or self-contact condition is enforced using the penalty method. Along the open part of the crack, the leakage flux through the crack faces is obtained directly as a part of the solution without introducing any simplifying assumption. If the crack undergoes the closing mode, zero leakage flux condition is imposed along the contact zone. An application of the developed model is shown in numerical modeling of pump-in/shut-in test. It is illustrated that the developed model is able to capture the salient features bottomhole pressure/time records exhibit and can extract the confining stress perpendicular to the direction of the hydraulic fracture propagation from the fracture closure pressure.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/nag.2512DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/nag.2512/abstractPublisherArticle
Additional Information:© 2016 John Wiley & Sons, Ltd. Issue online: 12 September 2016; Version of record online: 12 April 2016; Manuscript Accepted: 3 January 2016; Manuscript Revised: 10 December 2015; Manuscript Received: 18 March 2015.
Subject Keywords:hydraulic fracturing; fracturing porous media; fracture closure pressure; crack face contact; cohesive crack model; XFEM; in-situ stress estimation
Issue or Number:15
Record Number:CaltechAUTHORS:20161111-083143784
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20161111-083143784
Official Citation:Mohammadnejad, T., and Andrade, J. E. (2016) Numerical modeling of hydraulic fracture propagation, closure and reopening using XFEM with application to in-situ stress estimation. Int. J. Numer. Anal. Meth. Geomech., 40: 2033–2060. doi: 10.1002/nag.2512
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71927
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Nov 2016 00:40
Last Modified:03 Oct 2019 16:12

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