Numerical Simulation of Proppant Transport Coupled with Multi-Planar-3D Hydraulic Fracture Propagation for Multi-Cluster Fracturing

Chen, Ming; Guo, Tiankui; Zou, Yushi; Zhang, Shicheng; Qu, Zhanqing

doi:10.1007/s00603-021-02694-7

Cited by 28 publications

(3 citation statements)

References 62 publications

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“…The necessity to develop unconventional reservoirs, including tight oil and gas formations, has become central in the field of energy exploration and extraction. , To establish a comprehensive production system, multiwell hydraulic fracturing has been extensively adopted due to its high efficiency in large-scale reservoir reconstruction. − This technique aims to generate widely distributed fracture networks to form a sufficient connection between the well and the formation. , To achieve precise control over the implementation of fracturing, the well pattern, comprising the well placement and the spacing between the wells and clusters, is adopted to regulate the fracturing process. However, given the diversity of geological conditions across different strata and the influence of stress interference, the fracture propagation behaviors during practical implementation are intricate and varied. − Hence, it is imperative for the optimization and implementation of fracturing strategies to accurately capture the three-dimensional fracture propagation characteristics, taking into full account the stress interference and the effect of layered heterogeneity.…”

Section: Introductionmentioning

confidence: 99%

Multiwell Fracturing Characteristic in Layered Heterogeneous Formation and the Optimization of Stimulated Reservoir Volume

Ke,

Wang,

et al. 2024

Energy Fuels

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Hydraulic fracturing within multiwell pads is considered an effective technique for enhancing the recovery of oil/gas resources, but the fracture propagation behaviors have not been fully understood, typically considering the layered heterogeneous construction and intricate stress interference effects. This work establishes a multiwell fracturing model based on the threedimensional displacement and pore pressure coupled cohesive method to precisely characterize the propagation and morphology features of the hydraulic fracture. The flow behavior in the well follows the Bernoulli equation, and the fluid distribution at each perforation point is automatically regulated with the fluid pipe element. The fracturing model is validated with the analytical solution for the penny-shaped fracture. Various fracturing scenarios, including the spatial relations of wells and clusters and the geological conditions are thoroughly revealed. The results demonstrate that the layered formation significantly influences the stress interference between wells and clusters and thus alters the fracture propagation. It can be observed that the intercluster stress interference is weakened when confined within the layered formation, where the fractures grow uniformly along the lateral direction even with a small cluster spacing. When the wells are located at different layers, three typical propagation modes are summarized as lateral propagation, penetration, and aggregation, depending on the in situ stress, rock strength, and fracture energy of different layers in the formation. Meanwhile, optimization of the well pattern is discussed from the perspective of the fracture area to achieve the maximization of the stimulated reservoir volume (SRV). These insights are helpful for the design and implementation of multiwell fracturing technology in tight formation with layered heterogeneous construction.

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Section: Introductionmentioning

confidence: 99%

Multiwell Fracturing Characteristic in Layered Heterogeneous Formation and the Optimization of Stimulated Reservoir Volume

Ke,

Wang,

et al. 2024

Energy Fuels

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“…Based on a previously developed two-dimensional RFPA model, Li et al (2012) established a three-dimensional finite element model considering seepage, damage and stress fields to simulate hydraulic fracturing. Utilizing the BEM, Chen et al (2022) considered proppant migration and multiplane three-dimensional fracture propagation to study the proppant distribution in HFs during the multi-cluster fracturing process of a horizontal well. Based on the particle flow code (PFC), Zhang et al (2022b) constructed a coupled hydraulic-mechanical (HM) numerical model based on layered particles to study the HF propagation considering the characteristics of different bedding planes.…”

Section: Introductionmentioning

confidence: 99%

“…(2012) established a three-dimensional finite element model considering seepage, damage and stress fields to simulate hydraulic fracturing. Utilizing the BEM, Chen et al. (2022) considered proppant migration and multiplane three-dimensional fracture propagation to study the proppant distribution in HFs during the multi-cluster fracturing process of a horizontal well.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation on hydraulic fracture propagation in laminated shale based on thermo-hydro-mechanical-damage coupling model

Zhang

Guo

et al. 2023

International Journal of Damage Mechanics

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The temperature of a deep shale reservoir may reach more than 100°C, and the effect of thermal shock on shale hydraulic fracturing has rarely not been considered in previous studies. Based on mesoscopic damage mechanics and the finite element method, a thermo-hydro-mechanical-damage (THMD) coupling model considering temperature, seepage, stress, and damage fields was constructed to investigate the effects of reservoir temperature, convective heat transfer coefficient ( h), in-situ stress difference and bedding plane angle ( αθ) on shale hydraulic fracturing. The results show that multiple hydraulic fractures (HFs) can occur under thermal shock and that HFs control the distribution of seepage, temperature, and stress fields. Reservoir temperature, in-situ stress difference and αθ are primary factors affecting hydraulic fracturing, whereas h is a secondary factor. When the reservoir temperature rises from 50°C to 150°C, the initiation and breakdown pressures decrease by 65.5% and 16.7%, respectively. HFs cross the bedding plane more easily, and fracture complexity is obviously enhanced. A higher h is favourable for slightly reducing the initiation and breakdown pressures, but it has little influence on the fracture complexity. Once the in-situ stress difference is low, there is a high fracture complexity, but HFs are more easily captured by bedding planes to limit the propagation of fracture height. When the in-situ stress difference is high, HFs are more likely to form bi-wing fractures. Whether αθ is too large or small, it is not conducive to improving the fracture complexity. In this study, when αθ is 30°, HFs and bedding planes intersect to form a fracture network. Essentially, thermal shock plays a key role in reducing the initiation pressure and forming multiple HFs during the fracturing process, and fracture propagation mainly depends on the injection pressure. The results can serve as reasonable suggestions for the optimization of shale hydraulic fracturing.

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Identification of Fracture Extension Modes During Hydraulic Fracturing in Coalbed Methane Vertical Wells: A Case Study From the Southern Shizhuang Area of the Qinshui Basin, China

Yan,

Ni,

Zhang

et al. 2024

Geological Journal

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The accurate identification of fracture extension patterns in hydraulic fracturing can provide important guidance for the optimisation of fracturing parameters. In this paper, factors such as effective hole friction and wellbore flow friction during fracturing are fully considered, and a calculation model of net bottom‐hole pressure of fracturing is constructed. By introducing the change rate of net bottom‐hole pressure and the changing characteristics of the fracturing curve, seven fracture extension modes during hydraulic fracturing in coalbed methane vertical wells are established. The accuracy of the identification method is verified by the fracture monitoring and production results in Shizhuang South Block. The results show that fracture elongation is mainly controlled by in situ stress difference, angle between natural fracture and maximum principal stress, coal tensile strength, fracturing time, proppant and angle between other factors. When the fracture construction parameters are fixed, the smaller the difference between maximum and minimum horizontal principal stresses and the smaller the natural fractures and maximum horizontal principal stresses. When the reservoir potential is similar, the effective extension index is positively correlated with the gas production effect, and the effective extension index can effectively judge the fracturing effect. The higher the proportion of effective extension mode, the longer the extension time and the higher the stable daily gas production. The research results provide a method and reference for clearly identifying the fracture extension and the occurrence conditions of different extension modes in the hydraulic fracturing process.

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Numerical Simulation of Proppant Transport Coupled with Multi-Planar-3D Hydraulic Fracture Propagation for Multi-Cluster Fracturing

Cited by 28 publications

References 62 publications

Multiwell Fracturing Characteristic in Layered Heterogeneous Formation and the Optimization of Stimulated Reservoir Volume

Multiwell Fracturing Characteristic in Layered Heterogeneous Formation and the Optimization of Stimulated Reservoir Volume

Numerical simulation on hydraulic fracture propagation in laminated shale based on thermo-hydro-mechanical-damage coupling model

Identification of Fracture Extension Modes During Hydraulic Fracturing in Coalbed Methane Vertical Wells: A Case Study From the Southern Shizhuang Area of the Qinshui Basin, China

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