Direct Magnetic Resonance Measurement of Average Pore Size

Armin Afrough, Florin Marica, Derrick Green, Laura Romero-Zeron, Bruce Balcom

Research output: Contribution to conferencePaperResearchpeer-review

Abstract

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.
Original languageEnglish
Publication date2019
Number of pages7
Publication statusPublished - 2019
Event33rd International Symposium of the Society of Core Analysts - Pau, France
Duration: 26 Aug 201930 Aug 2019
Conference number: 33

Conference

Conference33rd International Symposium of the Society of Core Analysts
Number33
CountryFrance
CityPau
Period26/08/201930/08/2019

Bibliographical note

SCA2019-035

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