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Pulsed neutron logging responses of gas-bearing tight sandstone reservoir-numerical analysis and quantitative evaluation

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Abstract

Using the Monte Carlo method, we conducted a comprehensive numerical simulation to investigate the response of the pulsed neutron logging in gas-bearing tight sandstone reservoir. We developed the saturation evaluation method based on the relative variation of the epithermal neutron count rates (denoted by De). Moreover, influential factors including the reservoir property, the fluid compositions, the gas saturation, as well as the solid components are investigated. The relationship between the gas saturation and De was established. The study provided a theoretical support for the quantitative characterization of gas-bearing tight sandstone reservoirs and is potential generalized to similar unconventional resources.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (No. 41704113), Key R&D Projects in Shandong Province (No.2019GSF109047), the Top Talents Training Program for Young Teachers of Shandong University of Science and Technology (No. BJ20211119), Science and Technology Plan Project of Tai’an (No. 2022GX086).

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Zhang, L., Han, X., Li, Z. et al. Pulsed neutron logging responses of gas-bearing tight sandstone reservoir-numerical analysis and quantitative evaluation. J Radioanal Nucl Chem 333, 135–144 (2024). https://doi.org/10.1007/s10967-023-09256-x

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