oa Using Multiple Seismic Attributes to Improve Characteristics of the Complex Mishrif Carbonate Reservoir, Rumaila Field, South East Iraq

The first 3D seismic dataset over the giant Rumaila field in South East Iraq was acquired in 2012. Over 1800 km2 of high-fold, wide-azimuth seismic was acquired using the ISSN™ simultaneous source technique. The dataset underwent a bespoke ISSN processing sequence that included a Kirchhoff Pre-Stack Time Migration (Pre-STM) imaging in 2013. This paper highlights how the 3D seismic is being used to improve the geological understanding of the Upper Cretaceous Mishrif carbonate reservoir. In particular, it demonstrates the importance of using interpreted seismic horizons for multi-attribute generation at field-wide and localised scale. Understanding these seismic attributes is underpinned by comprehensive well-to-seismic ties, and draws on well-based geological insight captured in the geomodel. These multiple seismic attributes are used to highlight depositional trends, seismic facies variations, and potential changes in reservoir quality across this giant field.