37
-12 II -12
A B
-14 14
1 + 18
-20 2 -2 0 F
Group 1 Group2
> 80% Clay 60-80%Clay
-22 + Barbados logk=-2428+1132n (R2 053)- -22 logk=-1973+449n(R2=056)
Costa Rica --- Bryant (2002) -- Brynt (2002)
Sx Nnkai log k=-20 90 +654n -U k og k =-20 53 +61 n
-24 1 1 1 1 -24
0 02 04 06 08 1 0 02 04 06 08
Porosity Porosity
12
-14
S-18
Group 3
22 Silty-clay with<60%clay and <5%sand
log k =-19 91 +5 45n,(R2 =043)
Bryant (2002)
log k -2059 + 6 77n
24 I I I
0 02 04 06 08 1
Porosity
Figure 2-7. Permeabilities classified based on grain size distribution. Solid lines
represent permeability-porosity relationship predicted for samples used in this
study. Dashed line represents permeability-porosity relationships of Bryant
(2002).
In order to understand the general trend of permeability-porosity relationships
based on grain size distribution, I compared my data with that of Bryant's (2002) Gulf of
Mexico data, which were obtained through consolidation tests. The dashed lines in
Figure 2-7 represent the relationships of Bryant (2002) and solid lines represent predicted
relationships from this study. For Group 1, the predicted permeability from this study
matched the permeabilities of Bryant's (2002) at porosities around 0.6 to 0.7. As