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A core-scale reconstructing method for shale
Ji LL(姬莉莉); Lin M(林缅); Cao GH(曹高辉); Jiang WB(江文滨)
AbstractCharacterization of shale cores with low and anisotropic permeability is complicated, due to the presence of multiscale pore structure and thin layers, and defies conventional methods. To accurately reproduce the morphology of multiscale pore structure of the shale core, a novel core-scale reconstructing method is proposed to reconstruct 3D digital-experimental models by means of the combination of SEM, EDS images, nitrogen adsorption and pressure pulse decay experiment result. In this method, the multiscale and multicomponent reconstructing algorithm is introduced to build the representative multiscale model for each layer, which can describe the complex 3D structures of nano organic pores, micro-nano inorganic pores, micro slits and several typical minerals. Especially, to reproduce the realistic morphology for shale, the optimization algorithm based on simulated annealing algorithm uses the experimental data as constrain conditions to adjust and optimize the model for each layer. To describe the bedding characteristics of the shale core, bedding fractures are constructed by analysis of the mineral distribution in the interface of two layers, and then the representative models for different layers are integrated together to obtain the final core-scale digital-experimental model. Finally, the model is validated by computing its morphological and flow properties and comparing them with those of the actual 3D shale sample. This method provide a way for systematically and continuously describe the multiscale and anisotropic pore structure (from nm-cm) of the shale core, and will be helpful for understanding the quality of the shale reservoir.
Indexed BySCI
WOS IDWOS:000461018600033
WOS Research AreaMultidisciplinary Sciences
WOS SubjectScience & Technology - Other Topics
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences [XDA14010304] ; National Natural Science Foundation of China [41872163, 41574129, 41690132] ; Major National Science and Technology Special Program of China [2017ZX05037-001]
ContributorLin, M ; Lin, M
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.{Ji, Lili、Lin, Mian、Cao, Gaohui、Jiang, Wenbin} Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
2.{Lin, Mian、Cao, Gaohui} Univ Chinese Acad Sci, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ji LL,Lin M,Cao GH,et al. A core-scale reconstructing method for shale[J]. SCIENTIFIC REPORTS,2019,9:AR004364.
APA 姬莉莉,林缅,曹高辉,&江文滨.(2019).A core-scale reconstructing method for shale.SCIENTIFIC REPORTS,9,AR004364.
MLA 姬莉莉,et al."A core-scale reconstructing method for shale".SCIENTIFIC REPORTS 9(2019):AR004364.
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