Determination of the petrophysical properties of the Khasib reservoir: East Baghdad oil field, middle Iraq

Abstract EN

This study aims to determine and evaluate the petrophysical characteristics of the Khasib formation, which represents the main oil-producing reservoir in the east Baghdad oilfield.

to accomplish the aim of the study, the log data for five wells have been interpreted using the Schlumberger Techlog 2015.3 software.

the main lithology of the Khasib formation has been determined as limestone based on the interpretation of neutron, density, and sonic logs and using the M-N cross plot method.

the shale volume was determined based on the gamma ray log, and the results showed that the shale volume in the Khasib formation ranges from about 15% to 27%, and this value increases toward the top of the formation.

the total porosity of the Khasib formation has been determined based on the density and neutron logs, and their values range from about 12% to 23%.

the effective porosity is calculated depending on the relationship between the total porosity and shale volume, and the values of this type of porosity range from 8% to 18%.

the study shows that the B and C units of the Khasib formation represent the best hydrocarbon-bearing zones, where these units are characterized by high values of effective porosity and oil saturation.

the units A, E and F of the formation are characterized by high values of shale content with low effective porosity, and these units represent cap or seal beds for the oil producing zones.

the other units (G, H and I) are characterized by high values of water saturation.