Tezislər / Theses

THE 3
rd
 INTERNATIONAL SCIENTIFIC CONFERENCES OF STUDENTS AND YOUNG RESEARCHERS 
dedicated to the 99
th
anniversary of the National Leader of Azerbaijan Heydar Aliyev
16
There is
 
similar importance of compaction and cementation in the 
destruction of porosity in sandstones of Balakhany suites in Yasamal 
anticline. Additionally, the study of the impact of calcite and clay quantities 
on reservoir properties has been carried out. The increase in calcite and clay 
fractions that feel the pore spaces within the reservoir is accompanied by a 
reduction in porosity and permeability. Clay presence has a greater impact 
on reservoir quality in terms of reduction of the above-mentioned parameters 
as calcite-rich sandstones create secondary porosity through the dissolution 
process. Sandstones of the Balakhany VIII and the Balakhany VI subunits 
observed in the outcrops of Yasamal anticline are divided into unconsolidated 
with minor calcite composition (up to 15 %), consolidated with calcite-rich 
composition (up to 20%), and overconsolidated with high calcite composition 
(40-50%) sandstones. The unconsolidated type sandstones are observed 
entire the structure, consolidated type of sandstones in southern-east limb, 
over-consolidated sandstones are distributed in the northern-east limb of the 
anticline, extending approximately 2 km (Zeynalov et all, 2017). Braided fluvial 
sandstones of the Balakhany VI subunit and upper portion of the Balakhany 
VIII subunit are potential reservoirs with medium-fine-grained textures, lesser 
degree for amalgamation, and internal diagenetic heterogeneities. 
Diagenetic heterogeneities of sandstones of these subunits directly impact 
reservoir quality due to compositional variations of calcite minerals.
References 
1. 
Anjos S.M.C., L.F.D.Ros, R.S.Souza, C.M.A.Silva and C.L.Sombra, 2020, Depositional 
and diagenetic controls on the reservoir quality of Lower Cretaceous Pendeˆncia 
sandstones, Potiguar rift basin, Brazil //AAPG Bulletin, v. 84, no.11 (2000), pp. 1719–1742 
2. 
Leila M. and Mohamed A., 2020, Diagenesis and petrophysical characteristics of the 
shallow Pliocene sandstone reservoirs in the Shinfas Gas Field, onshore Nile Delta, Egypt 
//Journal of Petroleum Exploration and Production Technology (2020) 10:1743-1761
3. 
Hind D.J., Aliyeva E., Allen M.B., Davies C.E., Kroonenberg S.B.,Simmons M.D., Vincent 
S.J., 2004, Sedimentation in a discharge dominated fluvial-lacustrine system: the 
Neogene Productive Series of the South Caspian Basin, Azerbaijan //Marine and 
Petroleum Geology 21 (2004) 613–638 
4. 
Zeynalov, G., Alkhasli, S., & Shahtakhtinskiy, A. (2017, November 1). Outcrop Analogue 
Study of Deformation Bands and Their Impact on Rock Properties of the Productive Series 
in South Caspian Basin //
Onepetro, Society of Petroleum Engineers. doi:10.2118/189018-
MS, 20 pages
. 
https://www.onepetro.org/conferencepaper/SPE-18901