Belayim oil fields represent one of the most giant and oldest oil fields in the Gulf of Suez rift basin that occupies an area of 260 Km2. A total average of production rate of about 200,000 barrels oil per day have been discovered since 1957 through the continuous exploration and development efforts. The evolution of exploration play concept in this field passed through five Phases. The integration of 2D and 3D application suggested a new phase of exploration with result from the interpretation of the basin modeling in the Gulf of Suez. The geological and 2D seismic integrated studies in the field reflected a matter of complexity in the Miocene and pre-Miocene structures. The 3D seismic had upgraded the data quality and increased the confidence in the data interpretations to decipher the complex fault shapes and intersections. However, emerging new concepts in the rift basin model, plus the extensive 3D seismic data coverage, offer the possibility of a new phase of succeeded exploration in the Gulf of Suez Belayim fields using new data and concepts. Systematic mapping of start geometries, erosional truncation surfaces and Synrift structural evolution reveal new concepts in the process of basin modeling and enhance the understanding of exploitation problems at the reservoir scale. The paper displays some applications of the 2D and 3D seismic and rift sequence modeling to develop new reserves. Petrobel succeeded to add four new good Discoveries in one year in Belayim field, which produced about 27 MMSTB to the oil in place and increased the daily production by the amount of 7500 BOPD.

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