Abstract
Predicting permeability from nuclear magnetic resonance (NMR) logging data using SDR model and Coates model provides a quick and relatively reasonable value for reservoir permeability estimate. Critical to these two models is to find contributions of different level of pore structure to permeability, but pore structure in them is only divided into two levels. In this study, T2 distribution is divided into several segments corresponding to different level of pore structure, and every segment has its weighted characteristic value. By this way, we have considered contributions of more different level of pore structure to permeability and established a new permeability model. It has been tested in dozens of core samples. Compared with results of Coates model and SDR model, the new NMR model result is more consistent with the air permeability. So, we provide an improved permeability estimate for low permeability and tight sandstone reservoir.
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Acknowledgments
The authors wish to thank Petrochina for allowing us to publish the study. We would like to thank Changqing Oilfield for providing us core samples.
Funding
This work was supported by the Petrochina scientific research project: Far detecting acoustic logging processing method & Joint inversion research of dielectric scanner logging and NMR logging (No: kt2018-10-07).
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Responsible Editor: Liang Xiao
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Xu, H., Li, C., Fan, Y. et al. A new permeability predictive model based on NMR data for sandstone reservoirs. Arab J Geosci 13, 1085 (2020). https://doi.org/10.1007/s12517-020-06055-6
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DOI: https://doi.org/10.1007/s12517-020-06055-6