Investigation of the Effect of Cemented Fractures on Fracturing Network Propagation in Model Block with Discrete Orthogonal Fractures

Wang, Y.; Li, C. H.

doi:10.1007/s00603-017-1198-y

Cited by 15 publications

(11 citation statements)

References 37 publications

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“…For discrete solids such as rock and soil, the interparticle damping effect reflects the energy dissipation in the collision process. Considering the force of the particles under damping, the force can be expressed as [12] :…”

Section: Theoretical Methodsmentioning

confidence: 99%

“…For example, Capone [9] and Shi [10] simplified the landslide body into a block-shaped rigid body to simulate the generation and propagation of landslide generated impulse waves. Ataie-Ashtiani and Shobeyri [11] and Wang [12] considered the landslide body deformation and simulated the landslide impulsive waves under twodimensional simple boundary conditions. However, these works either do not take into account the deformation of the landslide body or the boundary conditions are relatively simple, so it is difficult to portray the characteristics of landslide impulsive waves with complex conditions, which limits its application in practical projects.…”

Section: Introductionmentioning

confidence: 99%

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Unified particle method with application to the 2013 Huangping landslides and tsunamis event of China

2018

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In this study, a unified particle method is presented to simulate the fluid-solid coupling problem in broad range of scales such as landslide and tsunamis. First, a general overview of the method is addressed, and the governing equations are solved in a Lagrangian form. Second, the method is used to simulate the Scott Russell wave generator experiment containing simple fluid-solid coupling, and the relationship between the simulation results and the experimental results is analyzed to verify the validity of the model. Then, the method is applied to the 2D processes simulation of Huangping landslide generated impulse waves in large scale. The results show that: in the verification test, the wave amplitude error between the simulation and the experimental data is almost 0. In the application case of Huangping landslides and tsunamis, the maximum impulse wave height obtained by the simulation is close to the local observations, which indicates that the method has high accuracy and credibility.

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Section: Theoretical Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Unified particle method with application to the 2013 Huangping landslides and tsunamis event of China

2018

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“…The control of stress boundary conditions is effective, and the experimental results are easy to observe and interpret. To conduct laboratory testing design, determination and selection of specimens are very important [14][15][16][17][18]. During hydraulic fracturing, the target reservoir is often thousands of meters deep.…”

Section: Introductionmentioning

confidence: 99%

“…For their study, the natural fractures are randomly distributed non-tectonic micro-fractures, to mimic the natural fracture characteristics in the Upper Triassic Yanchang Formation, Ordos Basin, China. Wang and Li [18] conducted triaxial hydraulic fracturing experiments to study the effect of cemented fractures on fracturing networks propagation; natural fractures with different paste cement strengths were considered in the model blocks. However, the influences of NFD on the propagation behaviors of hydraulic fractures were not deeply studied.…”

Section: Introductionmentioning

confidence: 99%

Insight into the Effect of Natural Fracture Density in a Shale Reservoir on Hydraulic Fracture Propagation: Physical Model Testing

Wang

2023

Energies

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Here, laboratory tests were conducted to examine the effects of natural fracture density (NFD) on the propagation of hydraulic fracture (HF), HF and natural fracture (NF) interaction, and the formation of the stimulated reservoir volume (SRV). Laboratory methods were proposed to prepare samples with dense, medium and spare discrete orthogonal fracture networks. After conducting a true triaxial hydraulic fracturing experiment on the synthetic blocks, the experimental results were analyzed by qualitative failure morphology descriptions, and the quantitative analysis used two proposed new indices. On the pump pressure profiles, it reflected the non-linear interactions between HFs and NFs well. For rock blocks with a dense DFN density, pump pressure curves present fluctuation shape and the degree of interaction between HF and NF is strong; however, for model blocks with a sparse DFN density, the pump pressure curves present a sudden drop shape. In addition, different propagation behaviors of NFs—offset, divert, branch, and cross NF—can be observed from the fractured model blocks. By using a proposed index of “P-SRV”, the relationship between NFD and the fracturing effectiveness was further confirmed. Furthermore, the most striking finding is that mixed mode I–II and I–III fracture types can be formed in the naturally fractured model blocks. The experimental results are beneficial for grasping the influential mechanism of NFD on the propagation of HF and for developing more accurate and full 3D-coupled simulation models for unconventional oil and gas development.

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“…The analytical models were mainly established using differential stresses and approaching angles and were based on simplified assumptions. In experimental laboratory studies (Ai et al, 2018;Dehghan et al, 2015Dehghan et al, , 2016Liu Z. et al, 2014Liu Z. et al, , 2018Wang and Li, 2017;Zhou et al, 2010), blocks with artificial or natural fractures have been tested for investigating the interaction between HF and a single NF. These tests revealed that the conditions required for different interaction modes consist of opening, arresting, and crossing modes.…”

Section: Introductionmentioning

confidence: 99%

Geomechanical key parameters of the process of hydraulic fracturing propagation in fractured medium

Basirat

Goshtasbi

Ahmadi

2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Hydraulic Fracturing (HF) is a well-stimulation technique that creates fractures in rock formations through the injection of hydraulically pressurized fluid. Because of the interaction between HF and Natural Fractures (NFs), this process in fractured reservoirs is different from conventional reservoirs. This paper focuses mainly on three effects including anisotropy in the reservoir, strength parameters of discontinuities, and fracture density on HF propagation process using a numerical simulation of Discrete Element Method (DEM). To achieve this aim, a comprehensive study was performed with considering different situations of in situ stress, the presence of a joint set, and different fracture network density in numerical models. The analysis results showed that these factors play a crucial role in HF propagation process. It also was indicated that HF propagation path is not always along the maximum principal stress direction. The results of the numerical models displayed that the affected area under HF treatment is decreased with increasing the strength parameters of natural fracture and decreasing fracture intensity.

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Investigation of the Effect of Cemented Fractures on Fracturing Network Propagation in Model Block with Discrete Orthogonal Fractures

Cited by 15 publications

References 37 publications

Unified particle method with application to the 2013 Huangping landslides and tsunamis event of China

Unified particle method with application to the 2013 Huangping landslides and tsunamis event of China

Insight into the Effect of Natural Fracture Density in a Shale Reservoir on Hydraulic Fracture Propagation: Physical Model Testing

Geomechanical key parameters of the process of hydraulic fracturing propagation in fractured medium

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