Page 265 - Geology and Geochemistry of Oil and Gas

230 MATHEMATICAL MODELING IN PETROLEUM GEOLOGY

Fig. 11.13. Relationships among the reservoir-rock properties, surface activity parameters, and relative
clay content (Z) of the Productive Series of Azerbaijan (after Buryakovsky et al., 1986). 1 – Baku Ar-
chipelago and South Absheron Offshore Zone, 2 – Lower Kura Depression.

More sophisticated relationship between the permeability and clay cement content
and carbonate cement content was developed as follows:
2
k ¼ ð6700 130C cl Þ exp½ ð0:000172C 0:01172C cl 0:1ÞC carb Š (11.33)
cl
where C cl is the clay cement content (in wt%) and C carb the carbonate cement
content (in wt%).
Another relationship among the permeability, porosity, clay cement content, and
carbonate cement content may be expressed as follows:
(11.34)
lg k ¼ 3:935 þ 0:02f 0:075C carb 0:05C cl

with a correlation coefficient of multivariable regression of 0.8.

11.2.2.2.2. Crude oil. There are relationships among the crude oil parameters and
its composition. These relationships can be studied by correlation and regression