Physics Seminar -FR

Event Details:

Physics Department virtual seminar via Microsoft Teams (contact the Physics Dept for the link to join).

Speaker:  Peiyuan Yan, UNB Fredericton Physics

Topic: "Direct pore size and surface relaxivity measurement from variable temperature one-dimensional magnetic resonance experiment."

"Reservoir rocks which trap oil and gas have been extensively studied for decades, due to their importance in the petroleum industry. Pore size is an important petrophysical property controlling fluid storage and fluid transport in reservoir rocks. Magnetic resonance (MR) is a very promising technique for interrogating such samples, because it is non-destructive, non-invasive and sensitive to fluid dynamics and environment.  MR signal decay rates, from fluids in the pore space, depend on the pore size, the surface relaxivity and molecular diffusion as described by Brownstein-Tarr theory. In the present work, the correlation between surface relaxation and the diffusion coefficient of fluids, dependent on temperature, was proposed to estimate pore size and surface relaxivity with nonlinear fitting. Water-saturated glass bead packs were employed for initial experiments. The calculated pore size matches the geometric pore size. The proposed method was applied to determine the pore size of Berea, Buff Berea and Nugget sandstones. The pore sizes determined are in good agreement with scanning electron microscope (SEM) measurements."

NOTE: Seminar event starts at 1 p.m. to allow the speaker time to set up and time for attendees to have an open chat until the seminar start time of 1:15 p.m.