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Volume 47 Issue 4
Jul.  2025
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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2025  >  47(4): 904-912
MA Yingying, PENG Zebo, CHEN Jingzhi, WU Fei, NIE Xin, LIAO Zhongshu, ZHANG Gong. Super-resolution reconstruction technology for full-diameter core nuclear magnetic resonance scanning data: a global non-negative least squares-based approach[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2025, 47(4): 904-912. doi: 10.11781/sysydz2025040904
Citation: MA Yingying, PENG Zebo, CHEN Jingzhi, WU Fei, NIE Xin, LIAO Zhongshu, ZHANG Gong. Super-resolution reconstruction technology for full-diameter core nuclear magnetic resonance scanning data: a global non-negative least squares-based approach[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2025, 47(4): 904-912. doi: 10.11781/sysydz2025040904
shu

Super-resolution reconstruction technology for full-diameter core nuclear magnetic resonance scanning data: a global non-negative least squares-based approach

doi: 10.11781/sysydz2025040904
  • 1.

    Key Laboratory of Exploration Technology for Oil and Gas Resources of Ministry of Education, Yangtze University, Wuhan, Hubei 430100, China

  • 2.

    Oilfield Exploration Division, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China

  • 3.

    Oilfield Technology Research Institute, China Oilfield Services Limited, Beijing 101149, China

  • 4.

    Suzhou Niumag Analytical Instrument Corporation, Suzhou, Jiangsu 215000, China

  • Received Date: 2024-07-03
  • Rev Recd Date: 2025-06-08
  • Publish Date: 2025-07-28
    Abstract
  • Full-diameter core nuclear magnetic resonance (NMR) analysis is one of the key exploration and analysis techniques in unconventional oil and gas exploration. It provides continuous high-resolution information on rock core porosity, permeability, and fluid saturation. However, due to its large measurement sensitivity area, signals from different positions overlap, resulting in a significantly lower vertical resolution compared to instrument sampling. This limitation hinders its effectiveness in detecting thin interbedded reservoir. To improve the vertical resolution of the full-diameter core NMR measurements, the measured data were modeled as the convolution of the instrument's sensitivity area function and the core's real signal. High-resolution reconstruction of the original signal was achieved using global non-negative least squares, without changing the existing instrument structure or measurement mode. The feasibility of this method was validated through numerical simulations, physical experiments, and actual data analysis. Practical applications show that the high-resolution processed NMR porosity from well logging aligns more closely with gas-filled porosity. This method significantly improves the vertical resolution of full-diameter core NMR measurements, enhancing the detection capabilities for thin interbedded reservoirs.

     

    • All authors declare no relevant conflict of interests.
    The study design was contributed by MA Yingying, ZHANG Gong, CHEN Jingzhi, and LIAO Zhongshu. The experimental work was completed by LIAO Zhongshu and WU Fei. The manuscript was drafted and revised by ZHANG Gong and LIAO Zhongshu. Data processing was carried out by NIE Xin. The figures were completed by PENG Zebo. All authors have read the final version of the paper and consented to its submission.
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