Geology Reference
In-Depth Information
Figure 2.16
South Caspian Depression (Apsheron Peninsula). Productive Sequence
ground water total salinity vs. depth. Fields:
1.
Kala,
2.
Surakhany,
3.
Buzovny-Mashtagi,
4.
Karachukhur,
5.
Balakhany-Sabunchi-Ramany,
6.
Lokbatan,
7.
Bibieybat,
8.
Peschany
island,
9.
Zykh,
10.
Zyrya.
435 mg-equiv. in II Horizon and 220 mg-equiv. in IV
cde
. Additional exam-
ples are the Karachukhur Field where the salinity in the Balakhany Fm.
decreases from 260 in the V Horizon to 155 mg-equiv. в IX Horizon and
the Buzovny-Mashtagi Field where in various intervals of the Kirmaki Fm.
the salinity ranges between 60 and 40 mg-equiv. (Akhundov, Mekhtiyev
and Rachinsky, 1976).
Drastic water salinity changes over the distribution area of a single strati-
graphic interval in closely positioned fields are supported by numerous
salinity maps of individual formations and horizons in the Apsheron area
and other areas (see Figure 2.9) (Akhundov, Mekhtiyev and Rachinsky,
1976). These maps usually show intense salinity contour congestion over
relatively small areas. Good examples are the MGK Formation data in the
Kala and Zyrya fields. The distance between them is 12 km. The water salin-
ity in the former is about 180 mg-equiv. and in the latter 500 mg-equiv. The
distance between the Karachukhur and Surakhany fields is 5 km and the
V Horizon water salinity is respectively 260 and 200 mg-equiv. There are
other examples (Rachinsky, 1970).
A statistical processing was conducted of the data describing the nature,
form, correlation extent and closeness of the correlation between the for-
mation water salinity and its depth in the Apsheron's Pliocene. It included
143 intervals in 10 fields. It was shown that in all cases the correlation
between the variables is a curve with the correlation coefficients (-0.88) to
(0.99). The following must be kept in mind, however: if ground water salin-
ity and composition in the region's Pliocene complex was only a function
