Numerical modeling of hydraulic fracture propagation behaviors influenced by pre-existing injection and production wells

Gao, Qi; Cheng, Yuanfang; Han, Sen; Yan, Cheng; Jiang, Long

doi:10.1016/j.petrol.2018.09.005

Cited by 60 publications

(16 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to their results, fracture propagation is utterly dependent on the existence of injection wells during operational performances, and production wells did not play a substantial role in the length of the fractures. Furthermore, higher pore pressures will be needed for injecting processes than production processes during the hydraulic fracturing operations [41]. According to the results of this paper, during the injection of high-pressure fluid into the rock pore spaces, the effective stresses will reduce, and this event will cause tensile failure in the rock, which is discussed in Gao et al [41].…”

Section: Discussionmentioning

confidence: 86%

“…Gao et al [41] proposed a developed numerical model based on the cohesive zone method and extended finite element method to consider the impact of hydraulic fracturing propagation during operation performances. In this model, leak-off, propagation, hydraulic fracturing initiation, rock deformation, and fracturing fluid flow was modeled simultaneously.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

RETRACTED: Application of Symmetry Law in Numerical Modeling of Hydraulic Fracturing by Finite Element Method

Sun

Zhou

Lu³

et al. 2020

Symmetry

View full text Add to dashboard Cite

In this paper, influential parameters on the hydraulic fracturing processes in porous media were investigated. Besides, the simultaneous stimulation of solids, fluids and fractures geomechanical equations were numerically analyzed as a developed 3D model. To do this, the Abacus software was used as a multi-objective program to solve the physical-mechanical symmetry law governing equations, according to the finite element method. Two different layers, A (3104–2984 m) and B (4216–4326 m), are considered in the model. According to the result of this study, the maximum fracture opening length in the connection of the wall surface is 10 and 9 mm for layer B and layer A, respectively. Moreover, the internal fracture fluid pressure for layer B and layer A is 65 and 53 Mpa. It is indicated that fracture fluid pressure reduced with the increase in fracture propagation length. Consequently, the results of this study would be of benefit for petroleum industries to consider several crucial geomechanical characteristics in hydraulic fractures simultaneously as a developed numerical model for different formation layers to compare a comprehensive analysis between each layer.

show abstract

Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

RETRACTED: Application of Symmetry Law in Numerical Modeling of Hydraulic Fracturing by Finite Element Method

Sun

Zhou

Lu³

et al. 2020

Symmetry

View full text Add to dashboard Cite

show abstract

“…By controlling the geometry of the adjacent fracture and the fluid pressure, we can artificially intervene in the stress [34]. In research on fracture direction control during secondary fracturing, there is a series of studies on the relationship between stress field reconstruction and fracture direction [35][36][37][38][39]. The results show that the stress can be changed by adjacent fractures to control the fracture direction.…”

Section: Manual Intervention Of Interface Slippage In Hydraulic Fractmentioning

confidence: 99%

An Investigation into the Effects of Weak Interfaces on Fracture Height Containment in Hydraulic Fracturing

2019

View full text Add to dashboard Cite

Hydraulic fracturing is an effective method for developing unconventional reservoirs. The fracture height is a critical geometric parameter for fracturing design but will be limited by a weak interface. Fracture containment occurs when fracture propagation terminates at layer interfaces that are weaker than the surrounding rock. It always occurs in multilayer formation. Therefore, the mechanism of fracture height containment guides fracture height control in hydraulic fracturing. In order to study the fracture containment mechanism, this paper first calculates the propagation behaviour of the fracture in 3D under the influence of a weak interface through a block discrete element method and analyzes the geometric characteristics of the fracture after it meets the weak interface. Then, the induced stress of the hydraulic fracture on the weak interface is calculated by fracture mechanics theory, and the mechanism of blunting at the fracture tip is explained. Then, two kinds of interface slippage that can lead to blunting of the fracture tip are discussed. Based on the behavior of shear slippage at the interface, a control method for multilayer fracturing in thin sand-mud interbed and pay zone fracturing in shale is proposed. The results show that the fracture height is still limited by the weak interface in the formation without the difference of in-situ stress and rock properties. Interface slippage is the main factor impeding fracture propagation. Fracture height containment can be adjusted and controlled by changing the angle between the hydraulic fracture, the interface, and the stress state to strengthen and stiffen the interface. This study has a certain guiding significance for fracture height control in the design of hydraulic fracturing of shale or thin sand-mud interbed reservoirs.

show abstract

“…More weak planes of fracture propagation and point effect are created, resulting in mutual penetration of hydraulic fractures along more directions. Although a complicated network of hydraulic fracturing can be formed, the direction of hydraulic fractures cannot be controlled [26][27][28]. (2) One or more guide holes are distributed in a line of two fracturing boreholes.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on the Basic Rules of Multihole Linear Codirectional Hydraulic Fracturing

Wang

Zhang

2020

Geofluids

View full text Add to dashboard Cite

Directional rupture is one of the most important and common problems in rock breaking engineering. The purpose of directional rock breaking can be effectively realized by using multihole linear codirectional hydraulic fracturing. In this paper, realistic failure process analysis (RFPA) software is used to verify the experimental results of multihole linear codirectional hydraulic fracturing and investigate its basic law. The following results are demonstrated: (1) RFPA software can be very helpful to study the basic law of multihole linear codirectional hydraulic fracturing; (2) the process of multihole linear codirectional hydraulic fracturing can be divided into four stages: water injection boost, fracture initiation, stable fracture propagation, and fracture connection; and (3) multihole linear codirectional hydraulic fractures propagate along the direction of borehole distribution. Multihole codirectional hydraulic fracturing is influenced by the angle between the direction of the hole distribution and maximum principal stress, the difference of the principal stress, and the spacing of the boreholes. The smaller the angle, the difference value of the principal stress, and the hole spacing, the better the multihole codirectional hydraulic fracturing effect.

show abstract

Numerical modeling of hydraulic fracture propagation behaviors influenced by pre-existing injection and production wells

Cited by 60 publications

References 30 publications

RETRACTED: Application of Symmetry Law in Numerical Modeling of Hydraulic Fracturing by Finite Element Method

RETRACTED: Application of Symmetry Law in Numerical Modeling of Hydraulic Fracturing by Finite Element Method

An Investigation into the Effects of Weak Interfaces on Fracture Height Containment in Hydraulic Fracturing

Numerical Simulation on the Basic Rules of Multihole Linear Codirectional Hydraulic Fracturing

Contact Info

Product

Resources

About