Workflow for Coupled Geomechanical and Reservoir Problems – Recent Experiences

Settari, Tony

doi:10.3997/2214-4609.20149816

Cited by 2 publications

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“…For the simulation of hydromechanical multiphase fluid flow processes in reservoirs, i.e., Carbon Capture and Storage (CCS), numerical modelling is state of the art (Altmann et al, 2014;Cappa and Rutqvist, 2011;Kempka and Kühn, 2013;Rutqvist and Tsang, 2002;Rutqvist et al, 2007Rutqvist et al, , 2008Rutqvist, 2010). For that purpose, hydraulic multiphase flow and geomechanical simulators are sequentially coupled using one-way or two-way approaches (Settari and Mourits, 1994;Settari et al, 2005;Settari, 2012;Kempka et al, 2014Kempka et al, , 2015Tillner et al, 2014;Walters et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

An innovative computationally efficient hydromechanical coupling approach for fault reactivation in geological subsurface utilization

Adams

Kempka

Chabab

et al. 2018

Computers & Geosciences

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Estimating the efficiency and sustainability of geological subsurface utilization, i.e., Carbon Capture and Storage (CCS) requires an integrated risk assessment approach, considering the occurring coupled processes, beside others, the potential reactivation of existing faults. In this context, hydraulic and mechanical parameter uncertainties as well as different injection rates have to be considered and quantified to elaborate reliable environmental impact assessments. Consequently, the required sensitivity analyses consume significant computational time due to the high number of realizations that have to be carried out. Due to the high computational costs of two-way coupled simulations in large-scale 3D multiphase fluid flow systems, these are not applicable for the purpose of uncertainty and risk assessments. Hence, an innovative semi-analytical hydromechanical coupling approach for hydraulic fault reactivation will be introduced. This approach determines the void ratio evolution in representative fault elements using one preliminary base simulation, considering one model geometry and one set of hydromechanical parameters. The void ratio development is then approximated and related to one reference pressure at the base of the fault. The parametrization of the resulting functions is then directly implemented into a multiphase fluid flow simulator to carry out the semi-analytical coupling for the simulation of hydromechanical processes. Hereby, the iterative parameter exchange between the multiphase and mechanical simulators is omitted, since the update of porosity and permeability is controlled by one reference pore pressure at the fault base. The suggested procedure is capable to reduce the computational time required by coupled hydromechanical simulations of a multitude of injection rates by a factor of up to 15. P is transferred to the geomechanical simulator. An additional coupling parameter for non-isothermal studies is the temperature T. If this data transfer is occurring only in one direction (one-way), the resulting volumetric strain v will not be fed back to the multiphase flow simulator for updating porosity and permeability (Fig. 1 (a)). In case of large volumetric strains V occurring during the simulation, a one-way coupling may lead to inaccurate results (Cappa and Rutqvist, 2011; Chabab

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Section: Introductionmentioning

confidence: 99%

An innovative computationally efficient hydromechanical coupling approach for fault reactivation in geological subsurface utilization

Adams

Kempka

Chabab

et al. 2018

Computers & Geosciences

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“…However, in the literature there are alternative schemes such as partial coupling, which use flow and stress simulations separately, as can be observed in many studies such as Settari & Mourits (1994), Mainguy & Longuemare (2002), Walters et al (2002), Settari et al(2005), Dean et al (2006), Samier & De Gennaro (2007), Rutqvist et al(2002Rutqvist et al( , 2007Rutqvist et al( , 2008, Segura & Carol (2008a, 2008b, Herwanger & Koutsabeloulis (2011), Inoue & Fontoura (2009a, 2009b, Inoue et al (2011aInoue et al ( , 2011b, Settari (2012). Nevertheless, fully coupled simulations do not consist in a trivial task in the case of multiphase flow, requiring other means for geomechanical analysis involved in the hydrocarbons extraction.…”

Section: Introductionmentioning

confidence: 99%

Advances on Partial Coupling in Reservoir Simulation: A New Scheme of Hydromechanical Coupling

et al. 2013

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This paper deals with the implementation and validation of a new hydromechanical partial coupling methodology conducted between two commercial simulators of flow and stress. Such configuration is based on a coupling methodology developed by the Computational Geomechanics Group -ATHENA/GTEP -PUC-Rio, based on the consistent inclusion of terms in flow equation in order to approach the results of fully-coupled simulations. The IMEX ® flow simulator was included in the workflow of the coupling code in order to widen the application scope of the methodology developed. To include the new option of flow simulator was required some implementation effort together with validation through simplified models. The algorithms developed to guide the programming were defined after detailed study of numerical and computational functioning of the flow software. The results obtained with the new simulator were compared with the pre-existing configuration (ECLIPSE flow simulator), considering one and two way partial coupling and fully coupled models. In the comparison scenarios set out to validate the implementation, it was evaluated changes of average pore pressure in the reservoir, compaction and subsidence, as well pore pressure variations. Comparisons with the results of pre-existing configuration and the full-coupling scheme demonstrated the success of the developed algorithm. The exchange of coupling parameters between simulators, in the new configuration, has been implemented effectively. Parametric studies of the variables also demonstrated the quality of the new configuration coupling. The rigorous choice of exchange parameters between flow and stress simulators is crucial for obtaining reliable results.

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Workflow for Coupled Geomechanical and Reservoir Problems – Recent Experiences

Cited by 2 publications

References 0 publications

An innovative computationally efficient hydromechanical coupling approach for fault reactivation in geological subsurface utilization

An innovative computationally efficient hydromechanical coupling approach for fault reactivation in geological subsurface utilization

Advances on Partial Coupling in Reservoir Simulation: A New Scheme of Hydromechanical Coupling

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