Recent comprehensive review for extended finite element method (XFEM) based on hydraulic fracturing models for unconventional hydrocarbon reservoirs

Maulianda, Belladonna; Savitri, Cindy Dhevayani; Prakasan, Aruvin; Atdayev, Eziz; Yan, Twon Wai; Yong, Yew Kwang; Elrais, Khaled Abdalla; Barati, Reza

doi:10.1007/s13202-020-00919-z

Cited by 15 publications

(7 citation statements)

References 54 publications

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“…He et al (2016) reviewed two possible methods to generate directional controlled hydraulic fractures in caving mining, pointed out that directional hydraulic fracturing and stress shadow effect could make the propagation trajectory of hydraulic fractures contrary to the direction predicted by theory and suggested that proppant should be introduced into cave mining to enhance the stress shadow effect. Maulianda et al (2020) summarized the numerical modeling of hydraulic fracturing and elaborated the basic theory of hydraulic fracturing simulation. Sheng et al (2015) reviewed the existing mathematical and computational models for modeling rock formation and hydrodynamic behavior, as well as some key studies and their basic results.…”

Section: Review Of Stress Shadow and Methodsmentioning

confidence: 99%

“…(3) Some scholars (from Universiti Teknologi Petronas, Malaysia; University of Calgary, Canada; Kansas University, USA) (Maulianda et al, 2020) summarized the numerical modeling of hydraulic fracturing and elaborated the basic theory of hydraulic fracturing simulation and the effort is made to cover the analytical and numerical modelling, while focusing on a typical numerical method for continuumdiscontinuum analysis: Extended Finite Element Modelling (XFEM).…”

Section: Review Of Stress Shadow and Methodsmentioning

confidence: 99%

“…This summary describes the hydraulic fracturing mechanism and provides an overview of past developments of the research performed towards better understandings of the hydraulic fracturing and its potential impacts, with particular emphasis on the development of modelling techniques and their implementation on the hydraulic fracturing.Australian scholars (from School of Mining Engineering, Faculty of Engineering, UNSW Australia, Australia) (He et al. , 2016) reviewed two possible methods to generate directional controlled hydraulic fractures in caving mining, pointed out that directional hydraulic fracturing and stress shadow effect could make the propagation trajectory of hydraulic fractures contrary to the direction predicted by theory and suggested that proppant should be introduced into cave mining to enhance the stress shadow effect induced by multiple hydraulic fractures.Some scholars (from Universiti Teknologi Petronas, Malaysia; University of Calgary, Canada; Kansas University, USA) (Maulianda et al. , 2020) summarized the numerical modeling of hydraulic fracturing and elaborated the basic theory of hydraulic fracturing simulation and the effort is made to cover the analytical and numerical modelling, while focusing on a typical numerical method for continuum-discontinuum analysis: Extended Finite Element Modelling (XFEM).Compared with the previous reviews of numerical models and methods, some scholars specially study the propagation behavior of hydraulic fracturing fractures from the perspective of experimental testing.…”

Section: Introductionmentioning

confidence: 99%

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Stress-dependent unstable dynamic propagation of multiple hydraulic fractures: a review of stress shadow effects and continuum-discontinuum methods

Wang

Liu

2023

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PurposeThe unstable dynamic propagation of multistage hydrofracturing fractures leads to uneven development of the fracture network and research on the mechanism controlling this phenomenon indicates that the stress shadow effects around the fractures are the main mechanism causing this behaviour. Further studies and simulations of the stress shadow effects are necessary to understand the controlling mechanism and evaluate the fracturing effect.Design/methodology/approachIn the process of stress-dependent unstable dynamic propagation of fractures, there are both continuous stress fields and discontinuous fractures; therefore, in order to study the stress-dependent unstable dynamic propagation of multistage fracture networks, a series of continuum-discontinuum numerical methods and models are reviewed, including the well-developed extended finite element method, displacement discontinuity method, boundary element method and finite element-discrete element method.FindingsThe superposition of the surrounding stress field during fracture propagation causes different degrees of stress shadow effects between fractures and the main controlling factors of stress shadow effects are fracture initiation sequence, perforation cluster spacing and well spacing. The perforation cluster spacing varies with the initiation sequence, resulting in different stress shadow effects between fractures; for example, the smaller the perforation cluster spacing and well spacing are, the stronger the stress shadow effects are and the more seriously the fracture propagation inhibition arises. Moreover, as the spacing of perforation clusters and well spacing increases, the stress shadow effects decrease and the fracture propagation follows an almost straight pattern. In addition, the computed results of the dynamic distribution of stress-dependent unstable dynamic propagation of fractures under different stress fields are summarised.Originality/valueA state-of-art review of stress shadow effects and continuum-discontinuum methods for stress-dependent unstable dynamic propagation of multiple hydraulic fractures are well summarized and analysed. This paper can provide a reference for those engaged in the research of unstable dynamic propagation of multiple hydraulic structures and have a comprehensive grasp of the research in this field.

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Section: Review Of Stress Shadow and Methodsmentioning

confidence: 99%

Section: Review Of Stress Shadow and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stress-dependent unstable dynamic propagation of multiple hydraulic fractures: a review of stress shadow effects and continuum-discontinuum methods

Wang

Liu

2023

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“…Instead of defining fractures individually and modelling the strength degradation, this means that the properties of the domain are generalised and modelled as a continuum. The region of interest can then be discretised based on the regions of high and low fracture density, allowing for the modelling of the fractured and virgin zones of the reservoir [18,39]. The use of an ECM representation makes it simpler to apply well established numerical approaches such as the finite element method (FEM) to solve governing equations that describe the physical processes and behaviour of the medium.…”

Section: Equivalent Continuum Methods (Ecm)mentioning

confidence: 99%

A Novel Equivalent Continuum Approach for Modelling Hydraulic Fractures

2020

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Hydraulic fracturing has transitioned into widespread use over the last few decades. There are a variety of numerical methods available to simulate hydraulic fracturing. However, most current methods require a large number of input parameters, of which the values of some parameters are poorly constrained. This paper proposes a new method of modelling the hydraulically fractured region using void-ratio dependent relation to define the permeability of the fractured region. This approach is computationally efficient and reduces the number of input parameters. By implementing this method with an equivalent continuum representation, uncertainties are reduced arising from heterogeneity and anisotropy of earth materials. The computational efficiency improves modelling performance in stress sensitive zones such as in the vicinity of the injection well or near faults.

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“…Although the continuum method has high computational efficiency, it cannot directly describe the fracture geometry, which is approximated by damage bands. To overcome the problem of fracture description, the extended finite element method (XFEM) adds the degree of freedom to simulate the fracture behavior (Maulianda, 2020). The fractures can then be expressed explicitly (Zheng et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Shale Reservoir Fluid-Driven Fracture Network Morphology Based on Global CZM

Yang

Jiao

et al. 2021

Front. Earth Sci.

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There are a large number of natural fractures in shale reservoirs, which create great challenges to hydraulic fracturing. Activating the natural fractures in reservoirs can form a complex fracture network, enhance fracturing effects, and increase shale gas production. Reservoir geological conditions (low in situ stress, natural fracture distribution, and cement strength) and operation parameters (fracturing fluid viscosity and injection rate) have an important influence on fracture network propagation. In this article, a two-dimensional hydraulic fracturing fluid-mechanic coupling numerical model for shale reservoirs with natural fractures was established. Based on the global cohesive zone model, the influence of geological conditions and operation parameters on the propagation of the hydraulic fracture network and fracturing process is investigated. The numerical simulation results show that when the horizontal in situ stress difference, approach angle, and cement strength are low, it is easier to form a complex fracture network. Research on the construction parameters indicated that when the viscosity of the fracturing fluid is low, it is easier to form a complex network of fractures, but the length of the fractures is shorter; in contrast, the fractures are straight and long. In addition, increasing the injection rate is beneficial for increasing the complexity of the fracture network while increasing the initiation pressure and width of the principal fracture reduces the risk of sand plugging. This article also proposes an optimization solution for hydraulic fracturing operations based on numerical simulation results.

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Recent comprehensive review for extended finite element method (XFEM) based on hydraulic fracturing models for unconventional hydrocarbon reservoirs

Cited by 15 publications

References 54 publications

Stress-dependent unstable dynamic propagation of multiple hydraulic fractures: a review of stress shadow effects and continuum-discontinuum methods

Stress-dependent unstable dynamic propagation of multiple hydraulic fractures: a review of stress shadow effects and continuum-discontinuum methods

A Novel Equivalent Continuum Approach for Modelling Hydraulic Fractures

Numerical Simulation of Shale Reservoir Fluid-Driven Fracture Network Morphology Based on Global CZM

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