Characterization of complex hydraulic fractures in Eagle Ford shale oil development through embedded discrete fracture modeling

Torres, Mauricio Fiallos; Morales, Adrián; Yu, Wei; Miao, Jijun

doi:10.1016/s1876-3804(21)60057-5

Cited by 13 publications

(2 citation statements)

References 14 publications

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“…Therefore, reservoir characterization and geological modeling of shale gas reservoirs require the fine portrayal and modeling of fractures. When predicting the production performance of fractured horizontal wells in shale gas reservoirs, the characterization of the complex fracture network is the key to obtaining the most accurate results [6][7][8][9][10]. Currently, in most studies, the hydraulic fractures were set as simple straight and flat fractures, and the characterization of the fractures was relatively simple, which can easily lead to deviation of the results from the actual situation.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Production Performances of Horizontal Wells with a Fractured Shale Gas Reservoir

Xiao¹,

Zhang²,

Chen³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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The production performances of a well with a shale gas reservoir displaying a complex fracture network are simulated. In particular, a micro-seismic cloud diagram is used to describe the fracture network, and accordingly, a production model is introduced based on a multi-scale flow mechanism. A finite volume method is then exploited for the integration of the model equations. The effects of apparent permeability, conductivity, Langmuir volume, and bottom hole pressure on gas well production are studied accordingly. The simulation results show that ignoring the micro-scale flow mechanism of the shale gas leads to underestimating the well gas production. It is shown that after ten years of production, the cumulative gas production difference between the two scenarios with and without considering the micro-scale flow mechanisms is 19.5%. The greater the fracture conductivity, the higher the initial gas production of the gas well and the cumulative gas production. The larger the Langmuir volume, the higher the gas production rate and the cumulative gas production. With the reduction of the bottom hole pressure, the cumulative gas production increases, but the growth rate gradually decreases.

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Section: Introductionmentioning

confidence: 99%

Simulation of the Production Performances of Horizontal Wells with a Fractured Shale Gas Reservoir

Xiao¹,

Zhang²,

Chen³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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“…The rapid development of numerical methods and computer technology provides an effective way to study hydraulic fracture propagation in large-scale low-permeability reservoirs and compensates for the shortcomings of experimental research. − In recent years, many researchers have employed numerical methods to create large-scale three-dimensional (3D) fracturing models to study the behavior of fracture propagation during multiple horizontal well fracturing. , The effects of well spacing, perforation parameters, fracturing sequences, and horizontal stress differences on fracture propagation have provided a theoretical basis for optimizing horizontal well cluster spacing. − Large-scale fracturing models effectively solve the problem of size bottlenecks in the experimental specimens. Research on the fracture propagation law based on large-scale models can contribute to a better understanding of the mechanism of hydraulic fracture propagation in the field. − …”

Section: Introductionmentioning

confidence: 99%

Mechanisms of Hydraulic Fracture Propagation and Multi-well Effect during Multiple Vertical Well Fracturing in Layered Reservoirs with Low Permeability

Yang,

Li,

et al. 2023

Energy Fuels

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Segmental-layered modeling and fine grid division methods were proposed to construct a three-dimensional largescale layered geologic model and reveal the mechanisms of hydraulic fracture propagation and the well spacing effect in multi-well fracturing in layered reservoirs with low permeability. The hydraulic fracture propagation in layered reservoirs under multi-well fracturing was simulated using a continuum-based discrete element numerical method. The effects of the stratum property difference, in situ horizontal stress difference (HSD), and well spacing on breakdown pressures and fracture propagation were analyzed. The concept of "extension ellipse" was proposed to describe the propagation morphology of fractures, which addresses the difficulty of accurately characterizing the propagation morphology of fractures at the geologic scale. The influence range of the multiwell effect in layered reservoirs was also determined, and the effect mechanisms of stress amplification and attraction and repulsion between fractures on the behavior of hydraulic fracture propagation were revealed. Layered reservoirs and higher in situ HSD restrict the development of hydraulic fractures but greatly reduce the breakdown pressures. The multi-well fracturing mode changes the stress field distribution around the wells and weakens the effects of in situ HSD on fracture propagation. In comparison to homogeneous reservoirs, the range of the multi-well effect in the layered reservoirs is relatively small. At the fracturing site, the well spacing should be appropriately increased in the direction of the maximum horizontal stress and should be reduced in the direction of minimum horizontal stress, helping hydraulic fracture development and improving the fracturing stimulation effect in layered reservoirs. This study addresses the deficiency of considering stratum property differences in the existing large-scale fracturing models, and the results provide a reference for the optimization and design of fracturing simulation in the layered reservoirs with low permeability.

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A review of mechanical mechanism and prediction of natural fracture in shale

2022

Arab J Geosci

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Characterization of complex hydraulic fractures in Eagle Ford shale oil development through embedded discrete fracture modeling

Cited by 13 publications

References 14 publications

Simulation of the Production Performances of Horizontal Wells with a Fractured Shale Gas Reservoir

Simulation of the Production Performances of Horizontal Wells with a Fractured Shale Gas Reservoir

Mechanisms of Hydraulic Fracture Propagation and Multi-well Effect during Multiple Vertical Well Fracturing in Layered Reservoirs with Low Permeability

A review of mechanical mechanism and prediction of natural fracture in shale

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