Study on the channel flow control regulation of particle agents in fractured-vuggy carbonate reservoirs via CFD-DEM coupling method

You, Qing; Jiao, Baolei; Zhao, Guang; He, Long; Wu, Yining; Dai, Caili

doi:10.1016/j.petrol.2019.04.080

Cited by 17 publications

(4 citation statements)

References 32 publications

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“…Brahim simulated the crystallization blockage process in a heat exchanger and explored the effect of different flow rates, concentrations, temperatures, pressures, and pipe wall materials on crystallization [5,7]. Nergaard et al [8] investigated the formation of a calcium carbonate scale on the outer surface of a heating pipe in a recirculation device, separated the influence of saturation from temperature, and analyzed the linear scale growth rate of the calcium carbonate scale [9]. Chi et al [10] applied the groundwater chemistry simulation software Phreeqc to investigate the effect of temperature on the erosion of feldspar by groundwater solutions at different CO 2 partial pressures, calcium feldspar, potassium feldspar, and sodium feldspar in solution simultaneously and separately at different CO 2 partial pressures were hydrochemically simulated by Phreeqc [11].…”

Section: Introductionmentioning

confidence: 99%

“…Chi et al [10] applied the groundwater chemistry simulation software Phreeqc to investigate the effect of temperature on the erosion of feldspar by groundwater solutions at different CO 2 partial pressures, calcium feldspar, potassium feldspar, and sodium feldspar in solution simultaneously and separately at different CO 2 partial pressures were hydrochemically simulated by Phreeqc [11]. Fang et al [9] used a coupled computational fluid dynamics (CFD)-discrete element method to numerically analyze the movement of particles in a fractured fog model to clarify the migration and channel flow control law of particles in fractured porous carbonate reservoirs [12]; de Paula Cosmo et al [11] analyzed the calcium carbonate fouling law in oil and gas field pipeline with high CO 2 content under pseudo-equilibrium conditions by self-developed thermodynamic calculation software [13]; Zhiming et al [12] established a mathematical model of CaSO 4 precipitation fouling formation process in circular pipe from the perspective of heat and mass transfer, and conducted corresponding numerical simulation and experimental validation. Based on the simulated temperature, velocity, and CaSO 4 mass concentration fields in the circular pipe, the deposition rate, exfoliation rate, and thermal resistance of CaSO 4 fouling with time were calculated from this fouling model [14].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Fouling Pattern of Tunnel Drainage Pipe in Karst Areas

Lv,

Wu,

et al. 2023

Advances in Civil Engineering

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As the groundwater in karst areas is rich in calcium ions, when the groundwater flows out of the tunnel drainage pipe, calcium carbonate crystals will be precipitated and then adhere to the pipe wall, which will easily cause chemical blockage in the drainage pipe wall, thus affecting the drainage efficiency and leading to the increase of water pressure outside the tunnel lining, affecting the safety and stability of the structure. Therefore, the blockage of calcium carbonate crystals in tunnel drains is one of the most important problems for the safe and normal operation of tunnels. In order to quantify and qualify the process of crystalline blockage in the drainage system of tunnels in karst areas, this paper constructs a numerical model with coupled multiphysical fields of the flow field and particle concentration field and also combines data from indoor tests to compare and verify the simulation results and analyze the time-varying law of crystalline solids deposited on the pipe wall. In this paper, we consider the force situation of crystalline solids in the pipe by water flow, analyze the related theories, comprehensively study the migration and deposition law of crystalline particles in the drainage pipe, and establish a numerical simulation model of the pipe crystallization rate considering temperature, flow velocity and concentration of sediment particles based on ANSYS FLUENT software, and refine and analyze several parameters in the model, so that it can provide a theoretical analysis framework for the tunnel drainage pipe blockage in karst areas by providing a theoretical analysis framework.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Fouling Pattern of Tunnel Drainage Pipe in Karst Areas

Lv,

Wu,

et al. 2023

Advances in Civil Engineering

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“…The jamming and plugging were identified as two plugging mechanisms, and multiple factors were investigated for optimizing the diversion design. Meanwhile, recent studies about proppant transport in the horizontal wellbore and passing through fractures also shed light on the temporary plugging studies. − A computational fluid dynamics (CFD) model coupled with a discrete element method (DEM) model was used to simulate the liquid–solid two-phase flow for proppant transport. The coupled CFD–DEM approach has a great advantage for obtaining microscale particle-motion information and precisely capturing the movement of proppants in the wellbore under different suspension flow conditions.…”

Section: Introductionmentioning

confidence: 99%

Modeling Temporary Plugging Agent Transport in the Wellbore and Fracture with a Coupled Computational Fluid Dynamics–Discrete Element Method Approach

et al. 2021

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As the consumption of oil and gas resources is increasing, secondary exploitation in old wells and unconventional oil and gas exploitation methods are becoming increasingly important. As a result of complex reservoir environments and the reservoir properties, such as ultralow porosity and permeability, hydraulic fracturing is an important means to achieve effective recovery. Temporary plugging fracturing is currently an efficient fracturing technology and is suitable for refracturing of old wells and multi-stage fracturing in unconventional reservoirs, which is conducive to constructing complex fracture networks and increasing production. Recently, in the field of temporary plugging fracturing, how to design the operation parameters of temporary plugging fracturing still remains ambiguous and empirical. In this paper, a numerical simulation study of the liquid–solid two-phase flow of the temporary plugging agents and the fracturing fluid was conducted using two physical models: a wellbore flow model and a wellbore–fracture temporary plugging model. The transport processes of the temporary plugging agents along with fracturing fluid in a vertical wellbore, in a horizontal wellbore, and at a fracture position were simulated. Simulations that coupled computational fluid dynamics and the discrete element method were used in the simulation process. The effects of the temporary plugging agent concentration, particle size, particle size ratio, fracturing fluid rate, and fracturing fluid viscosity on the migration process of the temporary plugging agent were investigated. The simulation results show that a higher concentration and viscosity of a temporary plugging agent help to sustain the flow stability in the vertical wellbore, while the viscosity and flow rate of the fracturing fluid have an impact on whether sedimentation of the temporary plugging agent occurred in the horizontal wellbore. In addition, the particle size ratio and concentration of the temporary plugging agent are the key factors for a successful bridging and plugging. For a specific field application in Longmaxi Formation, Sichuan Province, the operation parameters of temporary plugging fracturing have been designed and achieved a successful refracturing treatment.

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“…The Eulerian method accurately captures the macroscopic features of particle migration, [18][19][20] whereas the Lagrangian method can depict the local details of individual particle motions. [21][22][23][24][25][26] As a Lagrangian method, the discrete element method (DEM) provides a straightforward approach to numerically study particle migration, which can exactly reproduce the motion of individual particles. The DEM can be classified into two categories according to the contact mechanism: the soft sphere 27 and hard sphere 28 models.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of particle plugging in hydraulic fracture by element partition method

Wang

Xin-yong

Zhao

et al. 2020

Num Anal Meth Geomechanics

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Summary Hydraulic fracturing (HF) treatment often involves particle migration and is applied for propping or plugging fractures. Particle migration behaviors, e.g., bridging, packing, and plugging, significantly affect the HF process. Hence, it is crucial to effectively simulate particle migration. In this study, a new numerical approach is developed based on a coupled element partition method (EPM). The EPM is used to model natural and hydraulic fractures, in which a fracture is allowed to propagate across an element, thereby avoiding remeshing in fracture simulations. To characterize the water flow process in a fracture, a fully hydromechanical coupled equation is adopted in the EPM. To model particle transportation in fractures with water flow, each particle is treated as a discrete element. The particles move in the fracture as a result of being dragged by fluid. Their movement, contact, and packing behaviors are simulated using the discrete element method. To reflect the plugging effect, an equivalent aperture approach is proposed. Using this method, the particle migration and its effect on water flow are well simulated. The simulation results show that this method can effectively reproduce particle bridging, plugging, and unblocking in a hydraulic fracture. Furthermore, it is demonstrated that particle plugging significantly affects water flow in a fracture and hence the propagation of hydraulic fracture. This method provides a simple and feasible approach for the simulation of particle migration in a hydraulic fracture.

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Study on the channel flow control regulation of particle agents in fractured-vuggy carbonate reservoirs via CFD-DEM coupling method

Cited by 17 publications

References 32 publications

Analysis of Fouling Pattern of Tunnel Drainage Pipe in Karst Areas

Analysis of Fouling Pattern of Tunnel Drainage Pipe in Karst Areas

Modeling Temporary Plugging Agent Transport in the Wellbore and Fracture with a Coupled Computational Fluid Dynamics–Discrete Element Method Approach

Numerical simulation of particle plugging in hydraulic fracture by element partition method

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