Title
Time-Resolved model for geothermal engineering in high porosity Slochteren sandstone
Author
Singh, A.
Fokker, P.A.
Publication year
2021
Abstract
This work is an extension of the time-resolved poro-elasto-plastic MohrCoulomb model by Fokker et al to include a more realistic constitutive model. Experiments on Slochteren sandstone revealed that the inelastic deformation contributes significantly in compressive deformation almost in all stages of loading and instigated the development of a Cam-Clay-like model to reproduce the Slochteren sandstone behavior. This model was adopted for the current extension. A typical behavior of this model is that the presence of a borehole causes both elastic and inelastic deformation everywhere in the reservoir, as opposed to the conventional philosophy with plastic and elastic zones. Our solution handles the spatial and temporal evolution of pressures, permeability, elastic and plastic properties under the assumption of symmetric loading. The applicability of the approach is demonstrated through a number of cases, like fluid injection, shut-in, production, stimulation, and an injection-production sequence.
Subject
Circular cavity
Geothermal stimulation
Injection
Poro-elasto-plastic model
Production,
Slochteren sandstone
Wellbore/borehole
Geological Survey Netherlands
2015 Energy
To reference this document use:
http://resolver.tudelft.nl/uuid:70be304b-48b1-46b7-9650-8b75770f9f22
TNO identifier
884965
Source
International Journal for Numerical and Analytical Methods in Geomechanics, 1-19
Document type
article