A New Method for Converting <i>T</i><sub>2</sub> Spectrum into Pore Radius

Fan Zhang; Zhenxue Jiang; Yuanhao Zhang; Bin Hu; Zaiquan Yang; Yuhua Yang; Xianglu Tang; Hanmin Xiao; Lin Zhu; Yunhao Han

doi:10.1007/s12583-021-1576-y

Volume 34 Issue 4

Aug 2023

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Journal of Earth Science > 2023 > 34(4): 966-974.

Fan Zhang, Zhenxue Jiang, Yuanhao Zhang, Bin Hu, Zaiquan Yang, Yuhua Yang, Xianglu Tang, Hanmin Xiao, Lin Zhu, Yunhao Han. A New Method for Converting T2 Spectrum into Pore Radius. Journal of Earth Science, 2023, 34(4): 966-974. doi: 10.1007/s12583-021-1576-y

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Fan Zhang, Zhenxue Jiang, Yuanhao Zhang, Bin Hu, Zaiquan Yang, Yuhua Yang, Xianglu Tang, Hanmin Xiao, Lin Zhu, Yunhao Han. A New Method for Converting T₂ Spectrum into Pore Radius. Journal of Earth Science, 2023, 34(4): 966-974. doi: 10.1007/s12583-021-1576-y

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A New Method for Converting T₂ Spectrum into Pore Radius

doi: 10.1007/s12583-021-1576-y

Fan Zhang^{1, 2, 3
,},
Zhenxue Jiang^{2, 3
,
,
,},
Yuanhao Zhang^{2, 3},
Bin Hu⁴,
Zaiquan Yang^{2, 3},
Yuhua Yang⁵,
Xianglu Tang^{2, 3},
Hanmin Xiao⁶,
Lin Zhu^{2, 3},
Yunhao Han^{2, 3}

1.
CNOOC Energy Economics Institute, Beijing 100013, China
2.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
3.
Unconventional Oil and Gas Science and Technology Institute, Beijing 102249, China
4.
PetroChina Changqing Oilfield Company, Xi'an 710018, China
5.
E&D Research Institute of Oilfield Company Ltd., Daqing 163412, China
6.
Research Institute of Petroleum Exploration and Development, Beijing 100083, China

More Information

Corresponding author: Zhenxue Jiang, jiangzx@cup.edu.cn
Received Date: 02 Aug 2021
Accepted Date: 13 Nov 2021

Available Online: 01 Aug 2023

Issue Publish Date: 30 Aug 2023

Abstract

Abstract

In this paper, a new method for converting the T₂ (relaxation time) of NMR (nuclear magnetic resonance) into the pore radius is proposed. Combined with NMR and centrifugation experiments, the relationship between pore radius and T₂ of the sample was established. The results show that the new method is more reasonable than the traditional method. When the sample was denser and the mercury saturation was lower, the pore distribution curve was obtained by traditional method had a worse agreement with mercury injection experiment, while pore distribution curve of the new method had a better agreement with the mercury injection curve, which reflected the greater advantage of the new method as the reservoir becomes denser. The new method can obtain all the pore information in the sample. The results show that the pores in tight sandstone are mainly consisted with mesopore and macropore, and the connectivity of macropore is better than that of mesopore. The new method can effectively characterize the full pore distribution and the seepage characteristics in different pores interval of tight reservoirs, which had a great significance to evaluate the recoverable resources of tight reservoir.
- tight reservoir,
- nuclear magnetic resonance (NMR),
- pore radius,
- T₂ spectrum

The authors declare that they have no conflict of interest.

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References(45)

References

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