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Title: A semianalytic time-resolved poro-elasto-plastic model for wellbore stability and stimulation
Authors: Fokker P.A.
Singh, A.
Wassing B.B.T.
Published in: International Journal for Numerical and Analytical Methods in Geomechanics
Abstract: Wellbore stability problems and stimulation operations call for models helping in understanding the subsurface behaviour and optimizing engineering performance. We present a fast, iteratively coupled model for the flow and mechanical behaviour that employs a time-sequential approach. Updates of pore pressure are calculated in a timestepping approach and propagated analytically to updates of the mechanical response. This way, the spatial and temporal evolution of pressure and mechanical response around a wellbore can be evaluated. The sequential approach facilitates the incorporation of pressure diffusion and of time-dependent plasticity. Also, it facilitates the implementation of permeability evolving with time, due to plasticity or stimulation. The model has been validated by means of a coupled numerical simulator. Its capabilities are demonstrated with a selection of sensitivity runs for typical parameters. Ongoing investigations target geothermal energy operations through the incorporation of thermo-elastic stresses and more advanced plasticity models. © 2020 The Authors. International Journal for Numerical and Analytical Methods in Geomechanics published by John Wiley & Sons Ltd
Citation: International Journal for Numerical and Analytical Methods in Geomechanics, 44(7): 1032-1052
Issue Date: 2020
Publisher: John Wiley and Sons Ltd
Keywords: coupled modelling
geothermal systems
wellbore stability
ISSN: 3639061
Author Scopus IDs: 6602134984
Author Affiliations: Fokker, P.A., HPT Lab, Utrecht University, Utrecht, Netherlands, TNO Applied Geoscience, Utrecht, Netherlands
Singh, A., HPT Lab, Utrecht University, Utrecht, Netherlands
Wassing, B.B.T., TNO Applied Geoscience, Utrecht, Netherlands
Funding Details: The project leading to the results in this article received funding from the European Union's Horizon 2020 research and innovation programmes under grant agreement nos 691728 and 727550. Horizon 2020 Framework Programme, H2020: 691728, 727550; European Commission, EC; Horizon 2020
Corresponding Author: Fokker, P.A.; HPT Lab, Netherlands; email:
Appears in Collections:Journal Publications [CE]

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