Application of Reservoir Flow Simulation Integrated with Geomechanics in Unconventional Tight Play

Lin, Menglu; Chen, Shengnan; Mbia, Ernest Ncha; Chen, Zhangxin

doi:10.1007/s00603-017-1304-1

Cited by 11 publications

(6 citation statements)

References 22 publications

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“…The first term in Eq. [1] describes the standard finite element approximation, defined by continuous functions N i ( ) and standard displacement unknowns u i at nodal points i . The discontinuity in the fracture displacement field and the crack tip singular behavior are considered by the second and third terms, respectively.…”

Section: Xfem-based Crack Simulationmentioning

confidence: 99%

“…The production of natural gas in shale formations undergoes rapid expansion due to the increasing energy demand. In this scenario, hydraulic fracturing has become the principal technique and is extensively used by the natural gas industry [1][2][3][4]. This method provides a network of pressurized fractures in the solid matrix, which facilitates the extraction and production of natural gas.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the notch angle in hydraulic fracturing using XFEM

Martínez

Farias

Evangelista

2019

J Braz. Soc. Mech. Sci. Eng.

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This paper analyzes the initiation and propagation of hydraulic fracturing by nonlinear numerical modeling. A notch located at the wellbore stimulates hydraulic fracturing. The notch has a pivotal role in hydraulic fracturing. There is evidence that the notch can affect the required fluid pressure and the fracture propagation and velocity. Therefore, it has been associated with the effectiveness of hydraulic fracturing in tight gas reservoirs. The objective of this study is to explore the effect of the notch angle on hydraulic fracturing. Models in two-and three dimensions are presented and analyzed. These models are used to find the breakdown pressure and stress intensity factors, respectively. The numerical approximation of hydraulically driven fracture propagation is based on the extended finite element method (XFEM). XFEM enriches finite elements and nodes at elements intersected by the crack during the crack propagation. XFEM reproduces the discontinuity in the displacement domain without the discretization of this property directly in the mesh. Therefore, the generated mesh is independent of the crack propagation. The accuracy of the numerical approach is validated by reproducing laboratory-scale hydraulic fracturing tests and comparing results.

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Section: Xfem-based Crack Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the notch angle in hydraulic fracturing using XFEM

Martínez

Farias

Evangelista

2019

J Braz. Soc. Mech. Sci. Eng.

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“…Several versions of the dualcontinuum model have been developed to include, for instance, adsorption, heat, deformation and Knudsen diffusion [14][15][16][17]. Several authors presented research work in shale gas reservoirs with geomechanical effects, such as Wang et al [18], Lin et al [19], and Yang et al [20]. Wang et al [18] developed a general model including embedded discrete fractures, multiple interacting continua and geomechanics in shale gas reservoirs with multi-scale fractures.…”

Section: Introductionmentioning

confidence: 99%

Theoretical stability analysis of mixed finite element model of shale-gas flow with geomechanical effect

El-Amin

Kou

Sun

2020

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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In this work, we introduce a theoretical foundation of the stability analysis of the mixed finite element solution to the problem of shale-gas transport in fractured porous media with geomechanical effects. The differential system was solved numerically by the Mixed Finite Element Method (MFEM). The results include seven lemmas and a theorem with rigorous mathematical proofs. The stability analysis presents the boundedness condition of the MFE solution.

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“…The propagation path and radius of curvature of the hydrofractures can be predicted using the fracture propagation model combined with the varying stress field. In this paper, reservoir simulation was integrated with rock geomechanics to predict the well poststimulation productivities [23]. Several numerical and field studies have been presented to study the impact of the reservoir depletion on the pore pressure and the stress variation in the infill well zones [24].…”

Section: Introductionmentioning

confidence: 99%

“…The research findings reported in this paper can be used to predict the initiation, extension, and steering process of temporary plugging fracturing fractures and refracturing fractures in fractured reservoirs. Geofluids permeability of the reservoir matrix is significantly small and it is difficult to extract the fluid based only on the matrix [23,29]. In engineering, multicluster fracturing is generally employed in horizontal wells to activate reservoirs with natural fractures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Natural Fractures on Stress Evolution of Unconventional Reservoirs Using a Finite Element Method and a Fracture Continuum Method

Wang

Zhao

2019

Geofluids

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Refracturing, temporary plugging, and infilling well design play an important role in the development of reservoirs. The prediction of stress distribution can provide the basic guiding theory for the design and implementation of these techniques. In this paper, a fully-coupled three-dimensional production model based on the finite element method (FEM) and fracture continuum method (FCM) for naturally fractured reservoirs is presented to study the effects of fluid consumption on the reservoir stress. Furthermore, the effects of natural fractures on the stress re-distribution and stress re-orientation are also studied. The model also considers the influence of natural fractures on the permeability, and the effect of the effective stress on natural fracture openings, pore-elastic deformation, and fluid consumption. An analytical solution model and Eclipse were used for the comparison, which verifies the accuracy of the model results. Based on two cases of one cluster of fractures and three clusters of non-planar fractures, the research results revealed that natural fractures have a significant influence on the surrounding drainage, stress distribution, and stress re-orientation during the development. Under the influence of natural fractures, the production of the fluid along the direction of natural fractures is significantly easier, and it is highly probably that the insufficient consumption area is perpendicular to the direction of natural fractures. Compared with the conventional model, the stress distribution in the proposed model is deflected to a certain extent under the flow mode dominated by natural fractures, which is significantly prominent in the non-planar fracture model. Due to the effect of natural cracks, the absolute values of the stress, displacement, and stress difference in this model are relatively larger than those in the conventional model. Moreover, the re-orientation angles of the maximum principal stress are significantly different. After considering the natural cracks, there was an increase in the change in re-orientation and the re-orientation range. The research findings reported in this paper can be used to predict the initiation, extension, and steering process of temporary plugging fracturing fractures and refracturing fractures in fractured reservoirs.

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Application of Reservoir Flow Simulation Integrated with Geomechanics in Unconventional Tight Play

Cited by 11 publications

References 22 publications

Investigation of the notch angle in hydraulic fracturing using XFEM

Investigation of the notch angle in hydraulic fracturing using XFEM

Theoretical stability analysis of mixed finite element model of shale-gas flow with geomechanical effect

Effect of Natural Fractures on Stress Evolution of Unconventional Reservoirs Using a Finite Element Method and a Fracture Continuum Method

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