Fractal Dimension Calculation Method from NMR Measurement and Its Application

The pore structure of organic shale with nano-scale pores is important for reservoir evaluation. Fractals shows the self-similarity of shale rocks and can reflect the pore structure. The fractal dimension of organic shale from nuclear magnetic resonance (NMR) measurement was studied and some equatio...

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Bibliographic Details
Published in:Journal of physics. Conference series 2022-04, Vol.2219 (1), p.12024
Main Authors: Song, Xiaodong, Tan, Maojin, Wang, Zhizhan, Xie, Guanbao
Format: Article
Language:English
Subjects:
Evaluation
Fractal dimension
Fractal geometry
Fractals
Mathematical analysis
NMR
Nuclear magnetic resonance
Nuclear magnetic resonance (NMR)
Numeical simulation
Physics
Relaxation time
Saturation
Self-similarity
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Summary:The pore structure of organic shale with nano-scale pores is important for reservoir evaluation. Fractals shows the self-similarity of shale rocks and can reflect the pore structure. The fractal dimension of organic shale from nuclear magnetic resonance (NMR) measurement was studied and some equations were directly derived based on NMR transverse relaxation time ( T2 ) distribution. In a case study, the fractal dimensions were calculated by the proposed method and numerical simulation, and the formation cementation index in Archie equation for saturation evaluation was calculated from the fractal dimension of NMR logging. The comparison of calculated water saturation and the core experiment result prove that the proposed method is more effective than the previous Archie’s equation with default cement index.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2219/1/012024