Abstract
The pore structure of reservoir rocks has a dominate control on the electrical properties, elastic properties, storage properties and transmit characteristics of rock. Fractal theory and digital core technology were applied to study the pore structure characteristic of rock samples obtained from a gas reserve in Ordos Basin. Firstly, 3D digital cores were constructed based on CT scanning and image processing technology. Then, a three dimensional box-counting method was used to calculate the pore space fractal dimension of digital cores. Finally, the correlation between pore phase fractal dimension and rock porosity and permeability was analyzed. The results show that the reservoir pore space in the study area has fractal characteristics, and its complex pore structure can be described by fractal theory. Both the rock porosity and permeability have a good relationship between and fractal dimension of pore space. Thus, the pore space fractal dimension can be used to calculate the rock petrophysical parameters in the study area.
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Acknowledgments
The project is supported by National Natural Science Foundation (Number 41804125), the Natural Science Basic Research Program of Shaanxi (Number 2018JQ4043), and the Scientific Research Program funded by the Shaanxi Provincial Education Department (Number 18JK0619).
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Zhao, Jp., Chen, H., Li, N. (2021). Pore Structure Characterization Using Fractal Theory and 3D Digital Core. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2020. IFEDC 2020. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-0761-5_80
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DOI: https://doi.org/10.1007/978-981-16-0761-5_80
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