Numerical simulation of hydraulic fracture extension patterns at the interface of coal-measure composite rock mass with Cohesive Zone Model

Ma, Junqiang; Li, Xuehua; Yao, Qiangling; Tan, Kai

doi:10.1016/j.jclepro.2023.139001

Cited by 5 publications

(2 citation statements)

References 43 publications

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“…The latter has the advantage of avoiding the decrease in computational convergence caused by mesh refinement due to stress concentration and the ability to simulate fracture propagation direction changes. However, its computational efficiency is not high, and it cannot form intersecting fractures [21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Factors Influencing Three-Dimensional Multi-Cluster Hydraulic Fracturing Considering Interlayer Effect

Zhou,

Liu,

Liang

2024

Applied Sciences

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This study establishes a three-dimensional cohesive model of multi-cluster hydraulic fracturing using finite element method (FEM). It fully considers the interaction between the interlayer and the reservoir and analyzes the key factors influencing fracture propagation. The results show that during the initial stage of hydraulic fracturing, the width of the edge fracture is greater than that of the mid fracture, while the situation is reversed for the fracture length. A larger cluster spacing leads to less interaction between fractures, while a greater number of clusters increases the interaction between fractures. With an increase in displacement, the lost fracturing fluid entering the formation enhances the interaction between fractures. An increase in elastic modulus results in a decrease in the width and height of edge fractures but an increase in their length, with little impact on mid fractures. As Poisson’s ratio increases, there is little change in the fracture morphology of edge fractures, while the width and height of mid fractures increase significantly. With an increase in permeability, the influx of fracturing fluid into the interlayer decreases, leading to a reduction in the interaction between fractures. Finally, the study analyzes and discusses the impact of these parameters on the SRV (stimulated reservoir volume) in both the reservoir and the interlayer. These findings provide new insights for hydraulic fracturing and contribute to improving its productivity.

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Section: Introductionmentioning

confidence: 99%

Analysis of Factors Influencing Three-Dimensional Multi-Cluster Hydraulic Fracturing Considering Interlayer Effect

Zhou,

Liu,

Liang

2024

Applied Sciences

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“…Zheng et al [37] discussed the hydraulic fracture crossing ability considering the influence of injection scheme and injection parameters, as well as established the evaluation standard for the hydraulic fracture penetration. Ma et al [38] coupled the cohesive zone model in the framework of the extended finite element method to consider the elastic-plastic damage of rock and further proposed the major control factors for larger fracturing area in the rocks with different lithological combinations. Xie et al [39] constructed a 3D hydro-mechanical coupled model in layered rock and found that the shear displacement of the bedding planes affecting the hydraulic fracture width.…”

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confidence: 99%

Influence of High-Density Bedding Plane Characteristics on Hydraulic Fracture Propagation in Shale Oil Reservoir

Yan,

Wang,

2024

CMES

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The existence of high-density bedding planes is a typical characteristic of shale oil reservoirs. Understanding the behavior of hydraulic fracturing in high-density laminated rocks is significant for promoting shale oil production. In this study, a hydraulic fracturing model considering tensile failure and frictional slip of the bedding planes is established within the framework of the unified pipe-interface element method (UP-IEM). The model developed for simulating the interaction between the hydraulic fracture and the bedding plane is validated by comparison with experimental results. The hydraulic fracturing patterns in sealed and unsealed bedding planes are compared. Additionally, the effects of differential stress, bedding plane permeability, spacing, and the friction coefficient of the bedding plane are investigated. The results showed that a single main fracture crossing the bedding planes is more likely to form in sealed bedding planes under high differential stress. The decrease in bedding plane permeability and the increase in the friction coefficient also promote the fracture propagating perpendicular to the bedding planes. Shale with high-density bedding planes has a poorer fracturing effect than that with low-density bedding planes, as the hydraulic fracture is prone to initiate and propagate along the bedding planes. Moreover, higher injection pressure is needed to maintain fracture propagation along the bedding. An increase in bedding density will lead to a smaller fracturing area. Fracturing fluid seepage into the bedding planes slows shale fracturing. It is recommended that increasing the injection flow rate, selecting alternative fracturing fluids, and employing multiwell/multi-cluster fracturing may be efficient methods to improve energy production in shale oil reservoirs. KEYWORDSHydraulic fracturing; bedding planes; shale; unified pipe-interface element method Nomenclature σEffective stress tensor α Biot coefficient p Fluid pressure

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Simulation Investigation of Hydraulic Fracture Propagation Patterns at Lithological Interfaces Based on the Phase-Field Method

Gong,

Jin,

et al. 2024

Rock Mech Rock Eng

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Numerical simulation of hydraulic fracture extension patterns at the interface of coal-measure composite rock mass with Cohesive Zone Model

Cited by 5 publications

References 43 publications

Analysis of Factors Influencing Three-Dimensional Multi-Cluster Hydraulic Fracturing Considering Interlayer Effect

Analysis of Factors Influencing Three-Dimensional Multi-Cluster Hydraulic Fracturing Considering Interlayer Effect

Influence of High-Density Bedding Plane Characteristics on Hydraulic Fracture Propagation in Shale Oil Reservoir

Simulation Investigation of Hydraulic Fracture Propagation Patterns at Lithological Interfaces Based on the Phase-Field Method

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