Abstract
Summary In 2021 bp embarked on a model building and depth imaging project in a particularly challenging part of the Raven field in the Egyptian West Nile delta. The project undertook to rebuild the depth imaging model to resolve velocity instability in the reservoir section. What resulted was a highly iterative workflow that incrementally updated long wavelength components of the model before adding detail. Applied in a top-down fashion we show how limited offset, multi-azimuth seismic can be used to generate a detailed velocity model of the Messinian and pre-Messinian stratigraphy. We believe this workflow characterises an evolution in FWI application with wider benefit for areas such as the Nile data where seismic coverage primarily consists of short offset towed streamer data.
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