The effect of wait time on T2 distributions from NMR experiments.
Nuclear magnetic resonance (NMR) relaxation curves for both T1 and T2 on two brine-saturated core plugs have been measured at 1 MHz. T2 distributions were extracted from Carr-Purcell-Meiboom-Gill (CPMG) measurements using different wait times between consecutive echo sequences. The analysis was performed with both a limited number of exponentials and a continuous B-spline basis. The distributions depend strongly on wait time. The distributions were generally restored to the true distributions when a wait time correction was applied.
Lien
J R
JR
Department of Physics, University of Bergen, Norway.
Chang
C T
CT
Kulkarni
R
R
Watson
A T
AT
D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D010578:Petroleum / Q000032:analysis*; D016062:Porosity; D012680:Sensitivity and Specificity; D013997:Time Factors
D010578:Petroleum