RETRACTED: Numerical modeling of hydraulic fracture propagation: Accounting for the effect of stresses on the interaction between hydraulic and parallel natural fractures

Shakib, Jaber Taheri

doi:10.1016/j.ejpe.2013.11.010

Cited by 10 publications

(2 citation statements)

References 10 publications

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“…Natural Fractures. The orientation of the natural fracture will affect the propagation of the hydraulic fracture and the formation of fracture network [ 29 ]. The results show that when the angle between the natural fracture and hydraulic fracture is less than 30 degrees, the probability that the natural fracture will be activated and the original propagation path will be changed increases, causing the easier formation of a fracture network.…”

Section: Geological Conditions Of Fracture Network Formation In Tightmentioning

confidence: 99%

Theoretical Analysis of the Mechanism of Fracture Network Propagation with Stimulated Reservoir Volume (SRV) Fracturing in Tight Oil Reservoirs

Ren

Meng

et al. 2015

PLoS ONE

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Stimulated reservoir volume (SRV) fracturing in tight oil reservoirs often induces complex fracture-network growth, which has a fundamentally different formation mechanism from traditional planar bi-winged fracturing. To reveal the mechanism of fracture network propagation, this paper employs a modified displacement discontinuity method (DDM), mechanical mechanism analysis and initiation and propagation criteria for the theoretical model of fracture network propagation and its derivation. A reasonable solution of the theoretical model for a tight oil reservoir is obtained and verified by a numerical discrete method. Through theoretical calculation and computer programming, the variation rules of formation stress fields, hydraulic fracture propagation patterns (FPP) and branch fracture propagation angles and pressures are analyzed. The results show that during the process of fracture propagation, the initial orientation of the principal stress deflects, and the stress fields at the fracture tips change dramatically in the region surrounding the fracture. Whether the ideal fracture network can be produced depends on the geological conditions and on the engineering treatments. This study has both theoretical significance and practical application value by contributing to a better understanding of fracture network propagation mechanisms in unconventional oil/gas reservoirs and to the improvement of the science and design efficiency of reservoir fracturing.

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Section: Geological Conditions Of Fracture Network Formation In Tightmentioning

confidence: 99%

Theoretical Analysis of the Mechanism of Fracture Network Propagation with Stimulated Reservoir Volume (SRV) Fracturing in Tight Oil Reservoirs

Ren

Meng

et al. 2015

PLoS ONE

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“…The extended finite element method allows for a static mesh as fractures extend, and eliminates the need and computational expense of remeshing [17]. With the application of the extended finite element method, Jaber [17] discussed the effect of in situ stress anisotropy on fractures interaction, and he concluded that the direction of in situ stresses with respect to natural fractures set was an important factor dominating the efficiency of fracturing treatment. With the development of unconventional reservoirs, the hydraulic fracturing technology and fracture propagation behavior are attracting more and more public attention due to the uncertain effectiveness of fracturing [18].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of Interlayer Geo-stress Difference on Hydraulic Fracture Propagation: Physical Modeling and Numerical Simulations

Shang¹,

Ding²,

Yang³

et al. 2016

TOPEJ

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Abstract:The morphological control of the fracture has a great impact on the effectiveness of the hydraulic fracturing; the geostress difference between productive interval and barriers is one of controlling factors for the fracture height control. The propagation behavior of the hydraulic fracture was studied using the 3D physical simulation under conditions of the presence and absence of the interlaminar geostress difference. Combined with the result of the acoustic monitoring, the dynamic propagation process and the final shape of fracture were achieved. It shows that the lateral and vertical propagations of the fracture simultaneously occurred without the interlaminar geostress difference, and a fracture with round-shape face was finally presented. On the contrary, under the presence of the interlaminar geostress difference, due to the barrier effect of the high stress barrier on the vertical propagation of the fracture, the fracture height was obviously limited after the fracture propagated to the interval boundary. Therefore, the final shape of the fracture face was elliptical. Moreover, the extended finite element simulation was also adopted to analyze the propagation of the hydraulic fracture under two conditions mentioned above, and the result was consistent with that of the physical simulation. This verifies the feasibility of the extended finite element simulation method; therefore, this method was used to further simulate the fracture propagation behavior when several layers with different stiffness simultaneously exist. The result presents that during the fracture propagation, the fracture passed through the layer which has relatively weak stiffness and stopped before the layer which has stronger stiffness. Conclusions of this study can provide reference for the research of fracture propagation in complex geostress reservoirs.

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RETRACTED ARTICLE: Experimental Study on Crack Propagation Characteristics of Hydraulic Fracturing in Glutenite Reservoirs

Pan

Liu

2018

Geotech Geol Eng

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This article has been retracted at the request of the authors. Upon re-review of the data, the authors identified errors in this study. Later experimental studies show different results. Statements on the formation mechanism mentioned in the article should be revised based on the new results. All authors agree on this retraction. Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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RETRACTED: Numerical modeling of hydraulic fracture propagation: Accounting for the effect of stresses on the interaction between hydraulic and parallel natural fractures

Cited by 10 publications

References 10 publications

Theoretical Analysis of the Mechanism of Fracture Network Propagation with Stimulated Reservoir Volume (SRV) Fracturing in Tight Oil Reservoirs

Theoretical Analysis of the Mechanism of Fracture Network Propagation with Stimulated Reservoir Volume (SRV) Fracturing in Tight Oil Reservoirs

Investigating the Effect of Interlayer Geo-stress Difference on Hydraulic Fracture Propagation: Physical Modeling and Numerical Simulations

RETRACTED ARTICLE: Experimental Study on Crack Propagation Characteristics of Hydraulic Fracturing in Glutenite Reservoirs

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