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P res , MPa
0
10
20
30
40
50
60
70
80
90
100
500
Oligocene-Miocene
Foraminifera beds
1000
1500
2000
2500
3000
3500
4000
4500
5000
Up. Cretaceous
Jurassic
L. Cretaceous
6000
5500
6500
H, m
Figure 3.12 Initial formation pressure in waterhead complexes of Zagros Trough. Fields:
1. Mesjid-e-Suleimaan, 2. Karanj, 3. 3.Naft-Sefid, 4. 4.Haft-Kel, 5. Agha-Jari, 6.Gachsaran, 7. Lali,
8. Ahwaz, 9. Mansuri, 10. Marun, 11. Bibi-Hakimeh, 12. Binak, 13. 13.Rag-e-Sefid.
surface oil, gas and water shows, formation of deep feed salt lakes, etc.:
Burshtar, 1973; Levorsen, 1970; Russell, 1958) is easily materialized.
The third correlation pertains to the effect of neotectonic stresses on
the formation pressure increase in natural reservoirs of limited commu-
nication with the discharge zones. It is established from the compari-
son of abnormality factors in a tectonically (seismically) active band of
Bibi-Hakimeh and Lali fields with the Masjid-e-Suleiman, Haft-Kel and
Gachsaran fields. For the first group with the top of Asmari correspond-
ingly at 1,021 and 1,500 m the abnormality factors are 1.37 and 1.40 (see
Figure 3.12).
Symptomatic is a common AHFP association with productive local
structures and their maximum values with zones of low fracturing and
high temperature gradients (see Chapter 4) within these zones. Between
the structures, abnormal temperatures in reservoirs, as opposed to AHPP,
which are practically ubiquitous in the region, usually have lower values
(or are not present at all). In combination with all quoted features this
determines their mostly epigenetic origin in the Upper Jurassic-Lower
Miocene interval.
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