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The imaging of deep-water turbidite slope-channel systems in Offshore Angola has improved greatly during the past decade through the acquisition of high resolution seismic surveys. Within the Marte Field, located in Block 31 NE, high resolution seismic data provides greater definition of the internal stratigraphy of third-order channel complexes. Fourth-order channel cuts and associated facies, including muddy slumps, within the third-order systems have been mapped in considerable detail. Better definition of the internal depositional architecture reveals a high degree of heterogeneity within the channel systems and offers insights into the fluid dynamics of Marte Field reservoir systems. Improvements on data quality also enable the quantitative use of AVA and inversion products for populating static models with realistic reservoir properties. Given the sparse well data available for rock property calibration, the integration of high-resolution seismic facies mapping into geocellular models has allowed us to constrain further property populations based on well logs and analogs-calibrated net-to-gross estimates. Combining alternate facies descriptions within different polygons is used to provide alternate fluid dynamic scenarios and cases. The range of models produced allows us to establish a reservoir operating envelope that is being used for development well planning and for reservoir management decisions.

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