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Considering that on the value of anomaly SP except K p
influenced many other factors, one of which is the resistance of the
drilling fluid, so it is advisable to use not the absolute value of the
SP anomaly but relative (Fig3.3).

SP
SP
SP
ΔU rel = ΔU x / ΔU max <1, (3.2)

SP
where: ΔU x – SP anomaly to the reservoir with unknown K p;
SP
ΔU max - SP anomaly with a known reservoir for K p (base layer
with a maximum value of K p).

ПС
U від
1.0
0.8

0.6

0.4

0.2

0
0 20 40 K ,%
п
sp
Figure 3.3 - Dependence ΔU from K p

Method of GL

As we know from the theory of this method, the intensity I γ
depends on the presence of clay in the reservoir (in clay-content
collectors). The more clay content collectors, the lower value of K p
and the greater value of gamma intensity.
Thus, for these collectors exists inverse relationship
between the intensity of I γ and K p (Fig.3.4a).

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