Guneshli Field: Description of Productive Reservoirs

By

 Akif Narimanov¹, Elshad Aleskerov¹

(1) SOCAR, Baku, Azerbaijan

Main hydrocarbon reservoirs of the Guneshli field are terrigenous deposits of the Middle Pliocene productive formation.

Predominant source in formation of sand deposits of the Absheron threshold was north and northwest paleoflow sediments from the Paleo-Volga.

Main sand reservoirs of the Guneshli field within productive formation were deposited in fluviodeltaic and shallow marine environments.

Depending upon the depositional setting, main hydrocarbon-saturated sand formations differ in reservoir properties as well as in continuity over the field area.

Sand deposits of Pereriva Suite and Balakhany VIII have the best reservoir properties that were deposited in delta setting. Sand bodies of Balakhany X, IX, VII, VI, V, IV are characterised by relatively worse reservoir properties than what is in the first place connected with the sedimentation environment of shallow water.

There is a total tendency for reservoir properties deterioration up the section with what is closely connected to the entire deepening of the basin and to the processes related to this attribute.

Cyclo-stratigraphic analysis of the log data and detailed correlation of sand horizons allowed identifying the vertical and lateral distribution of sand formations and their reservoir properties over the Guneshli field.