An Efficient Model to Simulate Reservoir Stimulation and induced Microseismic Events on 3D Discrete Fracture Network for Unconventional Reservoirs

Delorme, Matthieu; Daniel, Jean‐Marc; Kada-Kloucha, Chakib; Khvoenkova, Nina; Schueller, Sylvie; Souque, Christine

doi:10.1190/urtec2013-146

Cited by 12 publications

(6 citation statements)

References 21 publications

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“…This high contrast of properties led to the introduction of dual-porosity models where matrix and fractures are treated separately and coupled through an exchange term. These models have been used to simulate various processes, such as fluid flow [Barenblatt andZheltov, 1960, Warren andRoot, 1963], solute transport [Dershowitz andMiller, 1995, Cvetkovic et al, 2004], and electric current flow [Roubinet and Irving, 2014], and they can also be associated with Discrete Fracture Network (DFN) approaches to consider the geometrical complexity of realistic fracture networks [Cacas et al, 1990, Delorme et al, 2013a. In the purely diffusive case, these models can be ruled by the following equation:…”

Section: Random Walk Methods For Dual-porosity Modelsmentioning

confidence: 99%

Random Walk Methods for Modeling Hydrodynamic Transport in Porous and Fractured Media from Pore to Reservoir Scale

et al. 2016

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International audienceRandom walk (RW) or Continuous Time Random Walk (CTRW) are recurring Monte Carlo methods used to model convective and diffusive transport in complex heterogeneous media. Many applications can be found, including fluid mechanic, hydrology, and chemical reactors modeling. These methods are easy to implement, very versatile and flexible enough to become appealing for many applications because they generally overlook of deeply simplify the building of explicit complex meshes required by deterministic methods. RW and CTRW provide a good physical understanding of the interactions between the space scales of het-erogeneities and the transport phenomena under consideration. In addition, they can result in efficient up-scaling methods, especially in context of flow and transport in fractured media. In the present study, we review the applications of RW or CTRW for several situations coping with various spatial scales, and different insights into up-scaling applications. RW and CTRW advantages and downsides are also discussed, thus providing a few avenues for further works and applications

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Section: Random Walk Methods For Dual-porosity Modelsmentioning

confidence: 99%

Random Walk Methods for Modeling Hydrodynamic Transport in Porous and Fractured Media from Pore to Reservoir Scale

et al. 2016

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“…The injection of a high pressure fluid induces new channels or fractures in the rock and enhances the ultimate recovery. This operation also induces shear failure of the preexisting natural fractures in shale formations, which results in natural fracture opening and propagation, and in the creation of an extensive, interconnected flowing network (Delorme et al 2013). This complex multiscale fracture network, including hydraulic and stimulated/non-stimulated natural fractures, together with the characteristics of extremely low permeability formation, results in a complex multi-medium reservoir and entails difficulties in the simulation of shale-gas or tight-oils production (see, for example, Mirzaei and Cipolla, 2012;Wu et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Simulation of Matrix/Fracture Interaction in Low-Permeability Fractured Unconventional Reservoirs

et al. 2018

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Unconventional reservoirs, such as shale-gas or tight-oil reservoirs, are generally highly fractured, including hydraulic fractures, stimulated and non-stimulated natural fractures of various sizes, embedded in lowpermeability formations. One of the main production mechanisms in unconventional reservoirs is the flow exchange between matrix and fracture media. However, due to extremely-low matrix permeability, the matrix/fracture exchange is very slow and the transient flow may last several to tens of years, i.e. almost the entire production life. The commonly-used dual-porosity modelling approach involves a computation of pseudo-steady-state matrix-fracture transfers with homogenized fluid and flow properties within the matrix medium. This kind of model clearly fails to handle the long-lasting matrix/fracture interaction in very-low permeability reservoirs, especially for multi-pahse flow with phase change problems. Moreover, a dualporosity model is not adapted for the simulation of matrix/fracture exchange when fractures are described by a DFN (Discrete Fracture Network). This paper presents an EDFM (Embedded Discrete Fracture Model) based on the MINC (Multiple INteracting Continua) proximity function to overcome this insufficiency of the conventional dual-porosity model.

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“…These fractures are long with a length of several hundred meters and narrow with a width of only several millimeters. Besides, fracturing in unconventional reservoirs induces usually a complex fracture network by reactivating reservoir natural fractures (see, for example, Delorme et al, 2013;Norbeck et al, 2014). A fine grid numerical model to simulate these field cases requires too much CPU time and it is generally impractical or even impossible to perform fine grid simulations in field applications.…”

Section: Introductionmentioning

confidence: 99%

Efficient simulation of hydraulic fractured wells in unconventional reservoirs

Ding

Jeannin

2014

Journal of Petroleum Science and Engineering

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Reservoir simulators remain essential tools for improved reservoir management in order to optimize hydraulic fracturing design in unconventional low permeability reservoirs. However, the commonly-used simulator requires too much computational efforts for the description of local phenomena in the vicinity of the hydraulic fractures, and is practically infeasible for field applications, due to large number of gridblocks involved in a full-field simulation with many multifractured complex wells. Therefore, coarse grid simulations have been widely used, but the techniques for the coarse grid simulation of fractured wells need to be improved. In this paper, we present efficient numerical methods to handle both long-term well performance and transient behaviour simulations for hydraulic fractured wells in unconventional reservoirs with a coarse grid. To simulate correctly the long-term behavior, transimissibilities around the fracture and the connection factor between a fractured block and the fracture are computed, based on a (pseudo)-steady-state near-fracture solution. This approach provides not only an accurate long-term well production calculation, but also a correct pressure distribution in the near-fracture region. In unconventional reservoirs, the transient effects cannot be ignored, due to the very low reservoir permeability and near-well/near-fracture physical processes such as fracturing fluid induced formation damage. In order to handle the transient effect, the coupled modeling technique is used, and its efficiency is demonstrated with a tight-gas reservoir.

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An Efficient Model to Simulate Reservoir Stimulation and induced Microseismic Events on 3D Discrete Fracture Network for Unconventional Reservoirs

Cited by 12 publications

References 21 publications

Random Walk Methods for Modeling Hydrodynamic Transport in Porous and Fractured Media from Pore to Reservoir Scale

Random Walk Methods for Modeling Hydrodynamic Transport in Porous and Fractured Media from Pore to Reservoir Scale

Simulation of Matrix/Fracture Interaction in Low-Permeability Fractured Unconventional Reservoirs

Efficient simulation of hydraulic fractured wells in unconventional reservoirs

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