A computational workflow to study CO2 transport in porous media with irregular grains: Coupling a Fourier series-based approach and CFD

Zhou, Yan; Guan, Wei; Zhao, Changming; Hu, Hengshan; He, Zhennan; Zou, Xinjue; Gong, Xiaoyi

doi:10.1016/j.jclepro.2023.138037

Cited by 6 publications

(4 citation statements)

References 54 publications

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“…As shown in Figure 7, with an increase in stress difference, the volume of fractured elements increases, while the fracture propagation rate decreases linearly [16]. The increase in geostress difference from 1 MPa to 2 MPa increases the volume of rupture unit and the fracture extension rate, which indicates that the geostress difference can promote the tangential and normal flow of fluids within a certain range, which in turn promotes the extension of the fracture tip as well as the two sides of the fracture [17].…”

Section: R Peer Review 8 Of 14mentioning

confidence: 89%

Analysis of Multi-Fracture Extension Pattern of Horizontal Wells in Shale Reservoirs under Natural Fracture Perturbation

Wang,

Zhao,

Liu

et al. 2024

Processes

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There are many natural fractures in shale reservoirs, changes in hydraulic fracture extension patterns. In the paper, a multi-fracture extension finite element model for horizontal wells in shale reservoirs under the disturbance of natural fractures is established by combining the actual geological parameters and construction parameters of a horizontal well multi-fracturing operation in X oilfield to analyze the effects of the difference in geostress, elastic modulus, angle of natural fractures, and the number of natural fracture groups on the hydraulic fracture extension. The results show that with the increase in ground stress difference and natural fracture angle, hydraulic fractures are more likely to penetrate the natural fractures; with the increase in elastic modulus, the fracture stress and tip stress increase, the volume of rupture unit, the fracture extension width and the pore pressure concentration area decrease, and it is easy to form a long and narrow fracture; with the increase in the number of fracture groups, the connectivity of reservoir fractures increases, the extension of fractures is stronger, and it is easier to form a complex fracture network.

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Section: R Peer Review 8 Of 14mentioning

confidence: 89%

Analysis of Multi-Fracture Extension Pattern of Horizontal Wells in Shale Reservoirs under Natural Fracture Perturbation

Wang,

Zhao,

Liu

et al. 2024

Processes

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“…More specifically: 1) For complex pore space structures, the main acquisition methods are imaging techniques such as CT scanning; however, these methods are burdened by high cost and the unavailability of large data sets, limiting the exploration of universal flow laws. Despite previous efforts regarding reconstruction pore medium algorithms (Hyman and Winter, 2014;Mosser et al, 2017;Zhou et al, 2023b), there is still much room for improvement.…”

Section: Discussionmentioning

confidence: 99%

Numerical methods to simulate spontaneous imbibition in microscopic pore structures: A review

Zhou,

Guan,

Zhao

et al. 2024

Capillarity

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Spontaneous imbibition, as a fundamental flow phenomenon, is widely utilized in fossil energy production, carbon dioxide and underground hydrogen storage. With the development of computing, the exploration of flow laws of spontaneous imbibition has evolved from macroscopic theoretical models to pore-scale numerical analysis. Currently, the solutions for multiphase flow in pore media mainly consider the volume of fluid and the phase field, and have been classed into level set methods based on macroscopic Navier-Stokes equations and the Shan-Chen, free energy, color gradient, and phase-field methods based on mesoscopic lattice Boltzmann equations. However, no comprehensive review article has summarized the strengths and limitations of these methods. Therefore, this work focuses on critically reviewing and commenting on the fundamentals and limitations of porescale models applied to spontaneous imbibition. In addition, recent works applying these methods are systematically reviewed. Our study aims to provide the scientific community with an expert opinion to understand the basic methods for solving the existing problems of spontaneous imbibition in porous media. Future research directions are suggested, namely, focusing on developing the reconstruction pore medium algorithms, establishing modeling methods for non-stationary states, exploring the flow laws in mixed wetting conditions, linking macroscopic and microscopic flow laws, and developing models for coupled multiphase flow numerical computation with machine learning. Overall, this review provides a comprehensive understanding of spontaneous imbibition simulation methods, promotes a thorough knowledge of spontaneous imbibition in porous media, provides guidance on exploring flow laws, and inspires researchers to give more credit to spontaneous imbibition studies.

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“…Channeling of the injected fluid due to reservoir heterogeneity will reduce the swept fluid volume and reduce oil recovery. , No matter whether conventional or unconventional reservoirs − or gas − or water injection, plugging the dominant channels and expanding the swept volume of the injected fluid are the developmental ideas throughout the whole process of oil and gas field development . Additionally, due to the influence of reservoir wettability, the injected fluid tends to invade the pore throats with the least flow resistance under the action of a capillary force, which will also lead to the formation of dominant channels. , Therefore, the optimal selection of profile control agents and the revelation of their transport and plugging mechanisms in porous media are the focus of research. − …”

Section: Introductionmentioning

confidence: 99%

Pore-Scale Transport Dynamic Behavior of Microspheres and Their Mechanisms for Enhanced Oil Recovery

Chen,

Li,

et al. 2024

Energy Fuels

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Polymer microsphere transport in porous media widely appears in oil field development. However, the migration and plugging mechanisms of the microspheres at the pore-throat scale need further study. In this paper, four pore-throat and one reservoir etching models were designed to simulate the pore throat distribution with different heterogeneities and real reservoir pore structures, respectively. The pore-throat matching relationship, dynamic transport behavior, and enhanced oil recovery (EOR) mechanisms of microspheres were clarified based on the injectivity and displacement experiments. The results show that microspheres will preferentially occupy larger pores and throats, showing obvious selective plugging characteristics. Taking the absence of microspheres entering and retention in the throat as the basis for the mismatch between microspheres and pore throats, the upper limits of the matching factors of the sectional model and the axial model are 1.21 and 1.47, respectively, which is consistent with the macroscopic matching results. Microspheres have a significant liquid flow diversion effect, which can force the solution flow into the unswept small throat area and simultaneously displace blindend residual oil and film residual oil in the swept throats. Microspheres can further increase the oil recovery by 6.85% compared with polymer flooding through three mechanisms: increasing the injection pressure, plugging dominant channels, and further dispersing the continuous remaining oil. The impact of the heterogeneity of the microsphere particle size and reservoir pore throat structure on microsphere migration and EOR effects will be a future research topic.

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A computational workflow to study CO2 transport in porous media with irregular grains: Coupling a Fourier series-based approach and CFD

Cited by 6 publications

References 54 publications

Analysis of Multi-Fracture Extension Pattern of Horizontal Wells in Shale Reservoirs under Natural Fracture Perturbation

Analysis of Multi-Fracture Extension Pattern of Horizontal Wells in Shale Reservoirs under Natural Fracture Perturbation

Numerical methods to simulate spontaneous imbibition in microscopic pore structures: A review

Pore-Scale Transport Dynamic Behavior of Microspheres and Their Mechanisms for Enhanced Oil Recovery

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