Fracture-based modeling of complex flow and CO2 migration in three-dimensional fractured rocks

Lee, Ivan; Ni, Chuen-Fa

doi:10.1016/j.cageo.2015.04.012

Cited by 28 publications

(18 citation statements)

References 44 publications

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“…The MCS flow realizations are further used to assess the effects of DFN properties on the flow and transport uncertainties. In this study, (Lee and Ni, 2015;Xu and Dowd, 2010).…”

Section: Transport Model Verification and Numerical Examplesmentioning

confidence: 92%

“…CC BY 4.0 License. 3 fluids to pass through the fracture at a relatively high velocity (e.g., Kwicklis and Healy, 1993;Lee and Ni, 2015;Pruess and Tsang, 1990). The following presents the mathematical formulas, a brief description of the mesh generation, and the finite element models for simulating the 3D DFN flow and transport.…”

Section: Mathematical Formulas and Numerical Models 30mentioning

confidence: 99%

“…The ratio can be one-tenth or a smaller value depending on the problem. The details of the mesh generation algorithm for connected fractures are available in the study of Lee and Ni (2015). 10…”

Section: Dfn Connections and The Unstructured Mesh Generationmentioning

confidence: 99%

“…Over the years, many studies have focused on developing flow and transport models and integrating DFN simulation workflows for 3D fracture networks (Hyman et al, 2014;Hyman et al, 2015a;Lee and Ni, 2015). Specifically, the DFN transport was mainly modeled based on Lagrangian approaches such as particle tracking and random walk algorithms (e.g., 15 Makedonska et al, 2015;Painter et al, 2008;Stalgorova and Babadagli, 2015;Wang and Cardenas, 2015) .…”

Section: Introductionmentioning

confidence: 99%

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Stochastic modeling of flow and conservative transport in threedimensional discrete fracture networks

Lee¹,

Ni²,

Lin³

et al. 2018

Preprint

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“…The MCS flow realizations are further used to assess the effects of DFN properties on the flow and transport uncertainties. In this study, (Lee and Ni, 2015;Xu and Dowd, 2010).…”

Section: Transport Model Verification and Numerical Examplesmentioning

confidence: 92%

Section: Mathematical Formulas and Numerical Models 30mentioning

confidence: 99%

Section: Dfn Connections and The Unstructured Mesh Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stochastic modeling of flow and conservative transport in threedimensional discrete fracture networks

Lee¹,

Ni²,

Lin³

et al. 2018

Preprint

Self Cite

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“…In contrast, the homogeneous model predicts an easy migration of CO 2 with lower overpressure. By recognizing the fact that fracture is usually the major flow pathway in a fault, a few researchers recently introduce the discrete fracture network (DFN) model to study fluids flow through fault zone or fractured rocks [13][14][15]. In general, these models divide reservoir system into fracture network and matrix rocks and 2 Geofluids approximate a fracture as open space bounded by parallel plates.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of CO₂ and Brine Leakage through Open Fracture in a Fault Zone: Open Channel Flow or Darcy Flow

2017

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Understanding fluids migration and leakage risk along the fault zone is necessary to guarantee the safety of CO 2 geological storage. The validity of Darcy's law gets challenged in dealing with the flow in open fractures since the occurring of turbulence flow. In this study, we develop a 2D model with usage of T2Well, an integrated wellbore-reservoir simulator, to investigate the leakage problem along open fractures which are embedded in a fault zone from the deep injection reservoir to shallow aquifers. The results record a positive feedback of gas expansion and pressure response in fracture, which causes a quick downward propagation of highly gas saturated zone from the top of fracture and an easy gas breakthrough in the shallower aquifers. The decreasing of aperture size of fracture significantly enhances the leakage rates in fracture, but with less influences as aperture increases. In comparison, the Equivalent Porous Media models show a good approximation with the momentum model of large apertures but poor for the small one. Nevertheless, the differences are small in terms of final CO 2 distribution among various aquifers, suggesting that Darcy's law may be still "effective" in solving flow problem along fractures in a constant injection system at a large time scale.

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A two‐phase flow extended finite element technology modeling CO₂ in fractured porous media

et al. 2022

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Carbon dioxide (CO 2 ) geological sequestration technology is an attractive means of reducing greenhouse gas emissions. This work aims to seek the transport mechanism of CO 2 in fractured porous media. A two-phase flow extended finite element model is developed in this paper. The two-phase flow in the fracture and porous matrix are all considered in the model development. We present numerical simulations under 2D linear flow conditions with specific and sensitivity analysis about fracture properties, capillary pressure, relative permeability, reservoir heterogeneity, and properties. It is found that fracture will dominate the CO 2 transport when the intersection angle of fracture orientation and injection direction is less than 90°, and CO 2 flows into deeper regions along the fracture. It is significant to find a suitable capillary pressure and relative permeability model which matches the microscopic pore structure when simulating CO 2 geological sequestration in fractured media. Using the Brooks-Corey equation for capillary pressure and relative permeability, the CO 2 transport efficiency would increase by around 16% compared to the Van Gneuchten equation. Besides, the CO 2 phase and properties evolution during CO 2 geological sequestration has a great influence on CO 2 transport efficiency., CO 2 transport efficiency is reduced by around 18% due to an increase in CO 2 density and viscosity when considering CO 2 properties evolution.

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Fracture-based modeling of complex flow and CO2 migration in three-dimensional fractured rocks

Cited by 28 publications

References 44 publications

Stochastic modeling of flow and conservative transport in threedimensional discrete fracture networks

Stochastic modeling of flow and conservative transport in threedimensional discrete fracture networks

Numerical Modeling of CO₂ and Brine Leakage through Open Fracture in a Fault Zone: Open Channel Flow or Darcy Flow

A two‐phase flow extended finite element technology modeling CO₂ in fractured porous media

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Fracture-based modeling of complex flow and CO2 migration in three-dimensional fractured rocks

Cited by 28 publications

References 44 publications

Stochastic modeling of flow and conservative transport in threedimensional discrete fracture networks

Stochastic modeling of flow and conservative transport in threedimensional discrete fracture networks

Numerical Modeling of CO2 and Brine Leakage through Open Fracture in a Fault Zone: Open Channel Flow or Darcy Flow

A two‐phase flow extended finite element technology modeling CO2 in fractured porous media

Contact Info

Product

Resources

About

Numerical Modeling of CO₂ and Brine Leakage through Open Fracture in a Fault Zone: Open Channel Flow or Darcy Flow

A two‐phase flow extended finite element technology modeling CO₂ in fractured porous media