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136 PETROPHYSICS: RESERVOIR ROCK PROPERTIES
NMR Calibrated
NMR Prmeability Permeability
0.01 1 100 10000 0.01 1 100 10000
- NMR
Core
Figure 3.26. NMRpermeability before and after calibration [36].
EXAMPLE
An NMR log was run in a well, and indicated a porosity of 18% and
log mean of relaxation time 2.5 at the depth of 6,000 feet. Estimate the
permeability at this depth for this well, using SDR correlations.
SOLUTION
Using Equation 3.67:
k = 4(2.5)4(0.18)2 = 5.06 mD
PERMEABILITY-POROSITY RELATIONSHIPS CARBONATE ROCKS
IN
The relationship between permeability and porosity in carbonate rock
formations is related to the grain size of the rock matrix, the size of
