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Fluid Typing: Efficient NMR Well-Logging with Interleaved CPMG Sequence at Different Frequencies

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Abstract

Fluid typing in reservoirs is currently based on longitudinal relaxation and/or diffusion contrast method, the latter represented by the dual-TE method which uses two types of Carr–Purcell–Meiboom–Gill (CPMG) echo trains with short and long echo spacings. In this paper, we describe a scheme to enhance efficiency of dual-TE method by combining it with multi-frequency CPMG. We took advantage of the echo spacing in the long-TE pulse sequence and interleaved a second sequence for a different slice in the gaps to obtain information from both slices. Verification experiments were performed with a surface coil in a gradient magnetic field.

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Acknowledgements

We acknowledge Dr. Tomoyuki Haishi for the use of the NOEMAX 1T magnet. Discussions with Prof. Mark S. Conradi and Lizhi Xiao are also acknowledged.

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Authors and Affiliations

  1. ABQMR, Albuquerque, NM, 87106, USA

    Baosong Wu, Stephen A. Altobelli & Eiichi Fukushima

  2. Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, 06520, USA

    Baosong Wu

Authors
  1. Baosong Wu
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  2. Stephen A. Altobelli
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  3. Eiichi Fukushima
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Correspondence to Baosong Wu.

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Wu, B., Altobelli, S.A. & Fukushima, E. Fluid Typing: Efficient NMR Well-Logging with Interleaved CPMG Sequence at Different Frequencies. Appl Magn Reson 48, 981–987 (2017). https://doi.org/10.1007/s00723-017-0929-2

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  • DOI: https://doi.org/10.1007/s00723-017-0929-2

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