الفهرس 
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Abstract
The present study dealt with evaluation of the subsurface geology and hydrocarbon potentialities of the Miocene formations south the Gulf of Suez using geological, geophysical data and wireline logs. The hydrocarbon potentialities of an area is a result of integrated lithological (source rock, reservoir rock and seal), structural and hydrocarbon generation factors affect on the area of interest and characterizes it rather than another areas. The sedimentary section of the Gulf of Suez contains six intervals, which exhibit source rock characteristics. The maturation level of the source rocks appears to be controlled by burial depth and age. The temperature gradient that affected the thermal alteration of the organic matter had apparently little influence on the various levels as it varies very little over the Gulf area with an average of 20 C/100 m. The 1D Petromod models revealed a mobile oil window in the study area. The generation and migration of the hydrocarbons are thought to have reached their peak by the end of the Miocene. This happened after the main structural feature had been imposed on the area and the main reservoirs had been deposited. The generation of oil and gas are thought to have occurred recently after the deposition of the Miocene sequence and the pathway from source rock to reservoir rocks was probably short. Migration along faults is responsible for vertical migration pathway from the mature source rocks to shallower reservoirs. The Miocene sediments not only provide the source and seal for all the oil accumulation, but also provide reservoirs for a major portion of the present reserves. In addition, the preMiocene highs provided structural and stratigraphical focal points for oil accumulation. They acted as a competent core over which the Miocene sediments were draped by the effect of differential compaction and the continual subsidence of the preMiocene lows, thus forming compactional anticlinal traps. In the structural lows, immediately adjoining the highs greater thicknesses of sediments tends to accumulate along with coarse clastics in the Miocene. At the end of the thesis four maps are constructed for the investigated formations integrating the geologicalgeophysical deduced lithological, petrophysical and structural parameters as well as the saturation condition and pay zone thickness to evaluate the hydrocarbon potentiality of each formation in the study area. These maps are closely related to what are named ?lease map? due to their applicability for developing the area and to be guide for future exploration plan. Inspection of the lease maps of the investigated formations reveals that the offshore area has low hydrocarbon saturation comparable with the water saturation. Only the western onshore area is characterized by a considerable high hydrocarbon saturation and maximum pay zone thickness nevertheless it represents a structurally low area. This indicates that the earlier deformation of the area before the generation and migration of the hydrocarbons. Based on the present study, the following recommendations have been taken: 1More attention should be given to the Miocene formations at the western onshore part of the area by using the newly developed seismic technology, particularly 3D seismic and bright spots. 2Further exploratory wells are recommended for drilling in the recommended area illustrated in the lease maps of each Miocene formation, where a considerable thickness of pay zone is recorded.