Hydraulic Fracture Initiation and Propagation from Wellbore with Oriented Perforation

Zhu, Hehua; Deng, Jingen; Jin, Xiaochun; Hu, Lianbo; Luo, Bo

doi:10.1007/s00603-014-0608-7

Cited by 124 publications

(50 citation statements)

References 29 publications

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“…The tangential stress distribution in the openhole horizontal wellbore is shown as Figure 7. We compare the FEM results with the analytical solution (AS) of tangential stress along the wellbore and perforation tunnel [11,12]. Figure 7(a) presents that the FEM results are close to the AS results with a difference of less than 3.5%.…”

Section: Modelmentioning

confidence: 77%

“…Many researchers have analyzed the stress state near the well and perforation with different analytical and numerical modeling approaches. For the analytic approaches [11,12], the wellbore and perforation cavities are treated separately, each being considered as an infinitely long cylinder. These cylinders are considered elastic and they are loaded with identical internal pressures.…”

Section: Introductionmentioning

confidence: 99%

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Continuum Damage Modeling of Hydraulic Fracture from Perforations in Horizontal Wells

Sun

Jia

Xue

2019

Mathematical Problems in Engineering

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The perforations play an important role in determining the near-wellbore fracture geometry during the stimulation phase. To address the impact of perforations on fracture geometry in horizontal wells, a 3D coupled hydromechanical finite element model is developed and employed. Based on the theory of continuum damage mechanics, scalar damage variable governs the degradation of the stiffness of the solid. Damage affects the crack element modeling that is used to consider crack behavior and construct a crack-tracking algorithm to simulate propagation. The model was validated against the analytical solutions and perforation fracture experiments. The results indicate that perforation can be used to control the fracturing pressure and propagation behavior of the initial fracture, which has a further effect on the fracture geometry of near-wellbore region in horizontal wells. Optimizing perforation parameters can direct the propagation of the initial fracture toward the preferred fracture plane. The results demonstrate an improved capability to depict the 3D near-wellbore fracture geometry and fracture propagation with a continuum damage model. The model enables the optimization of orientations and perforation parameters, so that most efficient perforating completions can be designed for hydraulic fracture stimulation.

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Section: Modelmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Continuum Damage Modeling of Hydraulic Fracture from Perforations in Horizontal Wells

Sun

Jia

Xue

2019

Mathematical Problems in Engineering

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“…Hydraulic fracturing is a widely used technique to create a highly permeable zone by the injection of a pressurized fluid into a formation and serves as the primary approach to enhance the recovery of hydrocarbon resources from low-permeability reservoirs. 1 A number of methods, such as laboratory experiment [2][3][4][5][6][7] and microseismic mapping technology, 8,9 have been developed to optimize the hydraulic fracturing treatment design. However, laboratory experiment is difficult to provide direct guide to field-scale hydraulic fracturing, although it is a valuable way to understand the mechanism of hydraulic fracture initiation and propagation.…”

Section: Introductionmentioning

confidence: 99%

A 2D explicit numerical scheme–based pore pressure cohesive zone model for simulating hydraulic fracture propagation in naturally fractured formation

Liu

Deng

et al. 2019

Energy Science & Engineering

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In this work, a 2D pore pressure cohesive zone model is presented to simulate the hydraulic fracture propagation in naturally fractured formation, in which the fracturing process is governed by a bilinear cohesive zone model equipped with Coulomb's friction law and the fluid flow within the hydraulic fracture is described by the lubrication equation. In this model, fluid leak‐off into rock matrix is ignored and a fully explicit temporal integration scheme is adopted to overcome the convergence issue of conventional implicit scheme (eg, Newton‐Raphson method). The advantage of the proposed model is that it does not require any special crossing criterion to determine the interaction behavior when the hydraulic fracture hits the natural fracture. Implementation of the model was described in detail, and then, the model was verified with well‐known analytical solution of KGD problem and criteria of hydraulic fracture crossing natural fracture. The capability of the proposed model to capture the interaction behavior between hydraulic fracture and natural fracture was demonstrated by the good agreement of the modeling result and analytical solution. Several numerical cases were performed to investigate the impact of key factors on fracture network evolution during hydraulic fracturing treatment. Results show that fracture network is not only governed by the spatial distribution of natural fracture, but also greatly affected by the initial hydraulic aperture of natural fracture and in situ stress contrast.

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“…The analysis of fracture initiation location and pressure was performed for different perforating parameters for vertical and horizontal wells, but the subsequent fracture propagation was not studied. Zhu et al [11] established a prediction model of hydraulic fracture initiation guided by directional perforation, and analyzed the influence of directional perforation on initiation pressure and fracture form. A true triaxial hydraulic fracturing experiment was conducted by Lei et al [12] who studied the influence of perforation spacing and horizontal in-situ stress differences on hydraulic fracture propagation, and thought that more perforation holes and smaller in-situ stress difference benefited propagation of fracture along the perforation direction.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Hydraulic Fracture Propagation Guided by Single Radial Boreholes

Guo

Gong

et al. 2017

Energies

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Conventional hydraulic fracturing is not effective in target oil development zones with available wellbores located in the azimuth of the non-maximum horizontal in-situ stress. To some extent, we think that the radial hydraulic jet drilling has the function of guiding hydraulic fracture propagation direction and promoting deep penetration, but this notion currently lacks an effective theoretical support for fracture propagation. In order to verify the technology, a 3D extended finite element numerical model of hydraulic fracturing promoted by the single radial borehole was established, and the influences of nine factors on propagation of hydraulic fracture guided by the single radial borehole were comprehensively analyzed. Moreover, the term 'Guidance factor (G f )' was introduced for the first time to effectively quantify the radial borehole guidance. The guidance of nine factors was evaluated through gray correlation analysis. The experimental results were consistent with the numerical simulation results to a certain extent. The study provides theoretical evidence for the artificial control technology of directional propagation of hydraulic fracture promoted by the single radial borehole, and it predicts the guidance effect of a single radial borehole on hydraulic fracture to a certain extent, which is helpful for planning well-completion and fracturing operation parameters in radial borehole-promoted hydraulic fracturing technology.

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Hydraulic Fracture Initiation and Propagation from Wellbore with Oriented Perforation

Cited by 124 publications

References 29 publications

Continuum Damage Modeling of Hydraulic Fracture from Perforations in Horizontal Wells

Continuum Damage Modeling of Hydraulic Fracture from Perforations in Horizontal Wells

A 2D explicit numerical scheme–based pore pressure cohesive zone model for simulating hydraulic fracture propagation in naturally fractured formation

Numerical Simulation of Hydraulic Fracture Propagation Guided by Single Radial Boreholes

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