الفهرس 
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Abstract
A first high-resolution palynological and stratigraphical study has been carried out on the Upper Cretaceous Raha Formation in three wells drilled in Bakr Oil Field of the central province of the Gulf of Suez, Egypt. A total of 60 rock samples were obtained from the General Petroleum Company (GPC).The majority of the samples are dominated by AOM (amorphous organic matter) and Phytoclasts with low content of palynomorphs mainly sporomorphs. The dinocysts and achritarchs are very rare. The palynomorphs exhibit a low preservation, many of them were distorted or broken and others were corroded. The dinocyst diversity is very low throughout the three wells. Many of them are represented by one or two individuals per sample.More than 127 species and subspecies belonging to 75 genera of palynomorphs have been identified in the three wells.Two palynozones have been recognized. They represent palynomorph association of significant and marker Cenomanian taxa. The first proposed GSCEN I Zone (Classopollisbrasiliensis-Tricolpitesfissilis Assemblage Zone) is belonging to the Late Cenomanian, while Early-Middle Cenomanian age is given to the second GSCEN II Zone (Afropollisjardinus-Crybelosporitespannuceus Assemblage Zone).The depositional environments are herein interpreted on the basis of the palynofacies changes and the gamma ray log frequencies. The marine/terrestrial ratio and the spore/pollen ratio are used as good tools for understanding the paleoenvironment and recognizing the identity of the different facies on the subsurface successions of Raha Formation in the Gulf of Suez. Generally, the distribution of Kerogene groups indicates a shallow marine environment fluctuating in depth from supratidal to outer neritic. The previously mentioned palynofacies criteria are applied as aleternative indicators to display the proximal-distal trends and oxygenation conditions.A well-established high frequency sequence stratigraphic framework of the Upper Cretaceous ’’Cenomanian’’ Raha Formation has been constructed, which is composed of mixed siliciclastic and carbonate sequences. The interpretation of the sequence stratigraphic framework of the Raha Formation is based on the lateral and vertical changes between supratidal and neritic shelf facies.The Raha Formation shows a complete five third order stratigraphic sequences in Bakr-114 well and two incomplete ones, while in B-115 well, it’s influenced with a normal fault due to the structural activity of the Gulf of Suez; however most of the formation was faulted-out, so it’s divided into one complete stratigraphic sequence and two incomplete sequences. Six third order stratigraphic sequences and two incomplete ones were interpreted in B-109 well.