Coupled multi-phase thermo-poromechanical effects. Case study: CO2 injection at In Salah, Algeria

Preisig, Matthias; Prévost, Jean‐Hérve

doi:10.1016/j.ijggc.2010.12.006

Cited by 123 publications

(104 citation statements)

References 24 publications

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“…[7][8][9][10] Although these approaches can address the problem, significant efforts and costs are required to construct numerical models for each potential candidate site and for uncertainty studies of geometric, geological and material parameters. Analytical solutions or semianalytical approaches may be more suitable because of their computational efficiency and ability to identify driving mechanisms.…”

Section: J Nmentioning

confidence: 99%

A hydromechanical approach to assess CO2 injection-induced surface uplift and caprock deflection

Barès

Laloui

2015

Geomechanics for Energy and the Environment

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h i g h l i g h t s• A semi-analytical solution is proposed to assess CO 2 injection in deformable medium.• Good agreement is found between the proposed solution and the finite element method.• Geomechanical interactions between a caprock and adjacent regions are examined.• The surface uplift measured at In Salah can be reproduced by the proposed solution.a r t i c l e i n f o b s t r a c tThis study focuses on the derivation of a semi-analytical approach for the evaluation of surface uplift and caprock deflection induced by underground injection of CO 2 . The adopted methodology includes the development of a mathematical model that incorporates the deformable behaviour of the storage reservoir and the flow of two immiscible fluids (CO 2 and brine) within the aquifer while the surface rock or the caprock layer is modelled as a thin plate. Governing equations are solved for the axisymmetric flexural deflection due to a constant rate of CO 2 injection. Both developed solutions are applied to a representative CO 2 storage case solved numerically by the finite element method, and good agreement between results is observed. When benchmarking to the In Salah surface uplift, the developed semi-analytical approach can capture a high rate of surface uplift caused by the pressure build-up during the early stage of CO 2 injection. The required calculation time is very short compared to a classical finite element approach. This method can be employed as a design tool for the analysis of uncertainty in parameters such as the injection rate, porosity, rock properties and geological structures. This semi-analytical approach also provides an efficient means of estimating the influence of high injection rates of CO 2 on surface uplift.

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Section: J Nmentioning

confidence: 99%

A hydromechanical approach to assess CO2 injection-induced surface uplift and caprock deflection

Barès

Laloui

2015

Geomechanics for Energy and the Environment

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“…The project used the Sleipner CO 2 Sequestration Project in Norway, and the In Salah fi CO2 Storage Project in Algeria. These projects were previously analyzed using coupled twophase fluid flow and geomechanics models by Pruess et al (2002), and Preisig and Prevost (2011), respectively. The coupled model developed in this project is used to predict the movement of CO 2 in the field, and the predictions are compared with other coupled modeling studies that have been previously carried out by other researchers.…”

Section: Test and Validation Of Modelsmentioning

confidence: 99%

“…3.87. The In Salah model follows the model developed by Preisig and Prevost (2011), who used Dynaflow to simulate the two-phase flow hydromechanical coupling process in their model. The cross-section of the reference model is shown in Fig.…”

Section: Validation Of the Coupled H-m Model Co 2 Injection At The Inmentioning

confidence: 99%

Training and Research on Probabilistic Hydro-Thermo-Mechanical Modeling of Carbon Dioxide Geological Sequestration in Fractured Porous Rocks

Gutierrez¹

2013

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Colorado School of Mines conducted research and training in the development and validation of an advanced CO 2 GS (Geological Sequestration) probabilistic simulation and risk assessment model. CO 2 GS simulation and risk assessment is used to develop advanced numerical simulation models of the subsurface to forecast CO 2 behavior and transport; optimize site operational practices; ensure site safety; and refine site monitoring, verification, and accounting efforts. As simulation models are refined with new data, the uncertainty surrounding the identified risks decrease, thereby providing more accurate risk assessment. The models considered the full coupling of multiple physical processes (geomechanical and fluid flow) and describe the effects of stochastic hydro-mechanical (H-M) parameters on the modeling of CO 2 flow and transport in fractured porous rocks. Graduate students were involved in the development and validation of the model that can be used to predict the fate, movement, and storage of CO 2 in subsurface formations, and to evaluate the risk of potential leakage to the atmosphere and underground aquifers. The main major contributions from the project include the development of: 1) an improved procedure to rigorously couple the simulations of hydro-thermomechanical (H-M) processes involved in CO 2 GS; 2) models for the hydro-mechanical behavior of fractured porous rocks with random fracture patterns; and 3) probabilistic methods to account for the effects of stochastic fluid flow and geomechanical properties on flow, transport, storage and leakage associated with CO 2 GS. The research project provided the means to educate and train graduate students in the science and technology of CO 2 GS, with a focus on geologic storage. Specifically, the training included the investigation of an advanced CO 2 GS simulation and risk assessment model that can be used to predict the fate, movement, and storage of CO 2 in underground formations, and the evaluation of the risk of potential CO 2 leakage to the atmosphere and underground aquifers.Page 5 BACKGROUND AND MOTIVATION IntroductionWith the increasing emission of greenhouse gases in the atmosphere, their reduction has become of paramount importance. Carbon capture and sequestration in appropriate geologic formations (saline aquifers, coal seams, and oil and gas reservoirs) are one of the promising methods to reduce the release of greenhouse gases in the atmosphere. However, there is still much work needed to be done to better account for the processes involved of CO 2 geological sequestration. Chief among these is the need to understand and predict the fate, movement, transport, storativity and potential leakage of CO 2 injected in sequestration reservoirs. Numerical models can help improve this understanding and can play significant roles in planning, design and management of CO 2 geological sequestration projects.The development and use of numerical models to CO 2 geological sequestration have many challenges. Chief among these is that CO 2 geological s...

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“…However, sequential coupling schemes have important impacts on the efficiency, stability, and accuracy of the numerical solutions. They usually introduce a splitting error in the numerical approximation, which requires a careful monitoring of the nonlinear residuals within each single time step (Jha and Juanes, 2007;Preisig and Prévost, 2011). This aspect limits sequential approaches to what are generally referred to as "loosely coupled problems", and they show a relatively slow, if at all, convergence rate for tightly coupled problems.…”

Section: Introductionmentioning

confidence: 99%

Flexible parallel implicit modelling of coupled thermal–hydraulic–mechanical processes in fractured rocks

Cacace

Jacquey

2017

Solid Earth

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Abstract. Theory and numerical implementation describing groundwater flow and the transport of heat and solute mass in fully saturated fractured rocks with elasto-plastic mechanical feedbacks are developed. In our formulation, fractures are considered as being of lower dimension than the hosting deformable porous rock and we consider their hydraulic and mechanical apertures as scaling parameters to ensure continuous exchange of fluid mass and energy within the fracturesolid matrix system. The coupled system of equations is implemented in a new simulator code that makes use of a Galerkin finite-element technique. The code builds on a flexible, object-oriented numerical framework (MOOSE, Multiphysics Object Oriented Simulation Environment) which provides an extensive scalable parallel and implicit coupling to solve for the multiphysics problem. The governing equations of groundwater flow, heat and mass transport, and rock deformation are solved in a weak sense (either by classical Newton-Raphson or by free Jacobian inexact NewtonKrylow schemes) on an underlying unstructured mesh. Nonlinear feedbacks among the active processes are enforced by considering evolving fluid and rock properties depending on the thermo-hydro-mechanical state of the system and the local structure, i.e. degree of connectivity, of the fracture system. A suite of applications is presented to illustrate the flexibility and capability of the new simulator to address problems of increasing complexity and occurring at different spatial (from centimetres to tens of kilometres) and temporal scales (from minutes to hundreds of years).

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Coupled multi-phase thermo-poromechanical effects. Case study: CO2 injection at In Salah, Algeria

Cited by 123 publications

References 24 publications

A hydromechanical approach to assess CO2 injection-induced surface uplift and caprock deflection

A hydromechanical approach to assess CO2 injection-induced surface uplift and caprock deflection

Training and Research on Probabilistic Hydro-Thermo-Mechanical Modeling of Carbon Dioxide Geological Sequestration in Fractured Porous Rocks

Flexible parallel implicit modelling of coupled thermal–hydraulic–mechanical processes in fractured rocks

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