Petrophysical Properties and Reservoir Assessment of Mishrif Formation in Eridu oil field, Southern Iraq

This study is achieved in the local area of Eridu oil field, where Mishrif Formation considered main productive reservoir. The was deposited during Cretaceous period secondary sedimentary cycle (Cenomanian-Early Turonian as a part Wasia Group, carbonate succession widespread throughout Arabian Plate. already have been evaluated terms depositional environments and their diagenetic processes. Here, it will test previous conclusions with petrophysical properties delineated by using well logging. results show there fully matching two reservoir units (MA MB). Dissolution primary porosity are responsible for forming variety large types. These types preserved hydrocarbons commercial quantities. MA MB low gamma ray high to moderate total effective porosities values. water saturation Sw upper unit (MA) very generally become water-bearing zone. appears all studied wells except E-NE part, characterized patches saturation. In contrast, lower (MB) values hydrocarbon (Sh) some areas middle field. Cap rocks (CR1 CR2) represents rock permeability due components these units. It contains lime mudstone log response this cap indicates gamma-ray peak value. Compaction dolomitization type unit.