Fractal characteristics of pore structure and its impact on adsorption and flow behaviors in shale

Zhou, Junping; Yang, Kailun; Xian, Xuefu; Tian, Shifeng; Cai, Jianchao

doi:10.1016/b978-0-12-817797-6.00006-3

Cited by 1 publication

(1 citation statement)

References 81 publications

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“…Previous studies defined fractals as self-similar objects independent of the level of magnification, characterized by the fractal dimension D f [114]. Since Mandelbrot (1977) proposed fractal theory, it has been widely used in petroleum exploration and development.…”

Section: Characterization Of Reservoir Inhomogeneity By Fractal Dimen...mentioning

confidence: 99%

Microscopic Characterization and Fractal Analysis of Pore Systems for Unconventional Reservoirs

Guan,

Cai,

et al. 2024

JMSE

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The complex pore structure of unconventional oil and gas reservoirs is one of the reasons for the difficulties in resource evaluation and development. Therefore, it is crucial to comprehensively characterize the pore structure, understand reservoir heterogeneity from multiple perspectives, and gain an in-depth understanding of fluid migration and accumulation mechanisms. This review outlines the methods and basic principles for characterizing microporous systems in unconventional reservoirs, summarizes the fractal analysis corresponding to the different methods, sorts out the relationship between the fractals and reservoir macroscopic physical properties (porosity, permeability, etc.) with the reservoir microscopic pore structures (pore structure parameters, pore connectivity, etc.). The research focuses on cutting-edge applications of characterization techniques, such as improved characterization accuracy, calibration of PSD ranges, and identification of different hydrogen compositions in pore systems for dynamic assessment of unconventional reservoirs. Fractal dimension analysis can effectively identify the quality level of the reservoir; complex pore-throat structures reduce permeability and destroy free fluid storage space, and the saturation of removable fluids is negatively correlated with Df. As for the mineral composition, the fractal dimension is positively correlated with quartz, negatively correlated with feldspar, and weakly correlated with clay mineral content. In future qualitative characterization studies, the application and combination of contrast agents, molecular dynamics simulations, artificial intelligence techniques, and 4D imaging techniques can effectively improve the spatial resolution of the images and explore the adsorption/desorption of gases within the pores, and also help to reduce the computational cost of these processes; these could also attempt to link reservoir characterization to research on supercritical carbon dioxide-enhanced integrated shale gas recovery, carbon geological sequestration, and advanced underground hydrogen storage.

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Section: Characterization Of Reservoir Inhomogeneity By Fractal Dimen...mentioning

confidence: 99%

Microscopic Characterization and Fractal Analysis of Pore Systems for Unconventional Reservoirs

Guan,

Cai,

et al. 2024

JMSE

View full text Add to dashboard Cite

show abstract

Fractal characteristics of pore structure and its impact on adsorption and flow behaviors in shale

Cited by 1 publication

References 81 publications

Microscopic Characterization and Fractal Analysis of Pore Systems for Unconventional Reservoirs

Microscopic Characterization and Fractal Analysis of Pore Systems for Unconventional Reservoirs

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