Magnetic Resonance relaxation time distribution measurements, notably T2 measurement, are commonly employed as a proxy measurement of pore size. They are not direct measurements of pore size and may only be converted to pore size through a separate determination of a relaxivity. In this work we employ the Brownstein-Tarr interpretation of magnetic resonance relaxation to identify non-ground modes of signal decay. These modes, most readily identified through a T1-T2 measurement, permit determination of an average pore size and surface relaxivities ρ1 and ρ2. Bulk pore size measurements are reported for three different sandstones with average pore size confirmed by electron microscopy. The pore size measurement may be spatially resolved with a spatially resolved T1-T2 measurement, implemented with an inversion recovery preparation for an SE-SPI T2 mapping measurement. Spatially resolved pore size measurements agree with bulk measurements.
|Number of pages||7|
|Publication status||Published - 2019|
|Event||33rd International Symposium of the Society of Core Analysts - Pau, France|
Duration: 26 Aug 2019 → 30 Aug 2019
Conference number: 33
|Conference||33rd International Symposium of the Society of Core Analysts|
|Period||26/08/2019 → 30/08/2019|