Blog

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  Top10 hot topics in chemistry and materials science Indicates which instruments are or are sought after

  December 21, 2019 Blog

  Recently, the research institute of science and technology strategy consulting of the Chinese academy of sciences, the literature information center of the Chinese academy of sciences and kerui wei 'an jointly released the 2019 research frontiers report and the 2019 research frontiers heat index to the world. On the basis of bibliometric indicators, the two reports put forw ...

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  NMR Magnetism Reveals the Dynamic Self-Permeation Process—Part 2

  December 14, 2019 Blog

  Results & Discussion 4.1 NMR Spectrum Characteristics of the Infiltration Process According to figure 3, the low-order coal has two distinct continuous spectral peaks, and the peak on the left is roughly located between 0.1~1ms at the relaxation time, representing the surface relaxation of water in the pore. The peak on the right is approximately 5~100ms, mainly ...

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  NMR Magnetism Reveals the Dynamic Self-Permeation Process—Part 1

  December 6, 2019 Blog

  Introduction The gas-water seepage ability has an important influence on the production of coalbed methane well. The gas-water two-phase flow process is accompanied by every link of coalbed methane development, and spontaneous infiltration is almost the case of all water-loving coal reservoirs. However, the study on the permeability damage and its influencing factors cau ...

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  NMR Technology & Reservoir Evaluation

  November 30, 2019 Blog

  From the perspective of the technical parameters of NMR, the most commonly used ones include relaxation time (T2 relaxation mostly), nuclear magnetic imaging (MRI) and two-dimensional nuclear magnetic resonance.T2 spectrum is probably the most familiar, and NMR imaging technology can clearly show the dynamic changes in the development process, such as the distribution of re ...

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  [Wonderful Review] The 11th National Low Field Nuclear Magnetic Resonance Technology and Application Seminar Successfully Completed

  November 23, 2019 Blog

  ▲ Photo taken at the conference Guide On November 14-16, the season of the autumn season, the country of Tianfu, the 11th National Low Field Nuclear Magnetic Resonance Technology and Application Seminar ended successfully in Chengdu. More than 80 representatives from experts, professors and scholars from the energy and mineral fields of major petroleum universitie ...

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  Using NMR to reveal the freezing process of pore water in sandstone – Part 3

  November 14, 2019 Blog

  Temperature changes during pore water freezing The air temperature in the tank and the rock surface temperature were tested, and the results were consistent with the set temperature range (see figure 5).The fully saturated coal sample has thermal anomalies within the range of -1℃ to -5℃. The enlarged figure in this area is shown in figure 6. Sudden increases in rock s ...

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