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Pore-Type-Dependent Fractal Features of Shales and Implications on Permeability

文献类型：期刊论文

作者Zhang, Qian1,2,3; Dong, Yanhui1,2,3; Tong, Shaoqing1,2,3
刊名FRACTAL AND FRACTIONAL
出版日期2023-11-01
卷号7期号:11页码:14
关键词shale rock pore type structural feature fractal dimension permeability
DOI10.3390/fractalfract7110803
英文摘要Pore structure features govern the capacity of gas storage and migration in shales and are highly dependent on the types of pores, i.e., interparticle (InterP) pores, intraparticle (IntraP) pores and organic matter (OM)-hosted pores. However, fractal features in terms of pore types and their respective contributions to permeability have been rarely addressed. On the basis of high-resolution imaging, fractal dimensions (Ds) have been determined from both pore size distributions and digital rock to quantify the heterogeneity in pore morphology and spatial textures. Overall, OM-hosted pores are smaller in size and more abundant in quantity, corresponding to a relatively high D, while IntraP pores are mainly isolated and scarce, translating into lower D values. Additionally, crack-like InterP pores with a moderate level of porosity and the D can play a pivotal role in shale seepage potential. A comparison of the estimated permeability among different pore types highlights that the contribution of interconnected OM pores to the overall permeability remains constrained unless they can link neighboring pore clusters, as commonly observed in organo-clay composites. Furthermore, the pore morphology and fractal features of shale rocks can exhibit noteworthy variations subjected to sedimentology, mineralogy, diagenesis and OM maturation.
WOS关键词NORTHERN GUIZHOU PROVINCE ; SICHUAN BASIN ; ORGANIC-RICH ; LACUSTRINE SHALE ; LONGMAXI SHALE ; GAS-RESERVOIR ; SEM ; ADSORPTION ; POROSITY ; NMR
资助项目National Natural Science Foundation of China
WOS研究方向Mathematics
语种英语
出版者MDPI
WOS记录号WOS:001119596800001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/111516]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Dong, Yanhui
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Qian,Dong, Yanhui,Tong, Shaoqing. Pore-Type-Dependent Fractal Features of Shales and Implications on Permeability[J]. FRACTAL AND FRACTIONAL,2023,7(11):14.
APA Zhang, Qian,Dong, Yanhui,&Tong, Shaoqing.(2023).Pore-Type-Dependent Fractal Features of Shales and Implications on Permeability.FRACTAL AND FRACTIONAL,7(11),14.
MLA Zhang, Qian,et al."Pore-Type-Dependent Fractal Features of Shales and Implications on Permeability".FRACTAL AND FRACTIONAL 7.11(2023):14.

入库方式： OAI收割

来源：地质与地球物理研究所

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