f Enhanced Stratigraphic Resolution of the Mishrif Formation by Integrating Biostratigraphy and Chemostratigraphy, Rumaila Field, Southern Iraq

A detailed chemostratigraphic and biostratigraphic study was performed on the upper Cretaceous Mishrif formation of the Rumaila field, Southern Iraq. Eleven historical cores were selected and sampled for δ13C, 87Sr/86Sr and biostratigraphic analysis to complement the detailed sedimentological descriptions of the cores. This data taken across the field area has allowed an increased understanding into the depositional setting and relative ages within the Mishrif formation as well as providing a detailed stratigraphic framework which can be used alongside the sedimentological sequence stratigraphy and carried into uncored wells.