AI Article Synopsis
- The study focused on measuring pore length scales and surface relaxivities of various rock core types using a 2MHz Rock Core Analyzer.
- The researchers detected high eigenmodes related to molecular diffusion under magnetic fields, confirming results with a more advanced 64MHz NMR system.
- They linked pore length to relaxation time through two-dimensional experiments and compared surface relaxivity findings with additional NMR methods for validation.
Article Abstract
Pore length scales and pore surface relaxivities of rock cores with different lithologies were studied on a 2MHz Rock Core Analyzer. To determine the pore length scales of the rock cores, the high eigenmodes of spin bearing molecules satisfying the diffusion equation were detected with optimized encoding periods in the presence of internal magnetic fields Bin. The results were confirmed using a 64MHz NMR system, which supports the feasibility of high eigenmode detection at fields as low as 2MHz. Furthermore, this methodology was combined with relaxometry measurements to a two-dimensional experiment, which provides correlation between pore length and relaxation time. This techniques also yields information on the surface relaxivity of the rock cores. The estimated surface relaxivities were then compared to the results using an independent NMR method.
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| http://dx.doi.org/10.1016/j.jmr.2014.07.005 | DOI Listing |
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