الفهرس 
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Abstract
October Oil Field is found in the central part of the Gulf of Suez, Egypt. It is located between longitudes 33o 00’ & 33o 12’ E and latitudes 28o 45’ & 28o 52’ N. The main objectives of the present study are the following points:
(1) Outlining the regional subsurface structural features affecting on the study area,
(2) Delineating the tectonic trends as well as the petrophysical properties of the main reservoir and consequently the potential parts of the area for oil exploration.
(3) Evaluating the hydrocarbon potential inside the interested reservoir (Nubia Formation), and finally,
(4) Locating promising prospects for hydrocarbon accumulations.
(5) Estimating the original oil in place (OOIP) for those promising prospects in an oil reservoir of the Nubia Formation.
To achieve these objectives the following geophysical techniques were used such as - potential field data, (i.e. magnetic and gravity), - seismic interpretation and - well logging analysis.
(a) Interpretation of the RTP magnetic map and Bouguer gravity anomaly map has been done to delineate the tectonic regime and consequently the new locations of the prospects in the study area for oil occurrences.
(b) Interpret thirty (30) seismic sections by identifying geological formation tops of the reflection horizons at the locations of the available wells, then, picking up and tying their real reflections and correlating these real reflections on the given seismic sections along all seismic lines by using software computer program (Petrel, 2013) developed by Schlumberger Services Company.
(c) Well logs analysis is used to evaluate the productive zones in terms of depths, thicknesses and petrophysical properties of these zones within the interested reservoir (Nubia Formation) for evaluation of the hydrocarbon potentiality using Interactive Petrophysics (IP) developed by LR Senergy Company.
It can be concluded that the October Oil Field is characterized by tilted fault blocks within this part of the Gulf of Suez towards the NE. There is one major fault dissecting these blocks with NW direction of the Red Sea System. These structurally highs fault blocks at its central region of WNW direction which is parallel to the Gulf of Suez trend are intersected by cross element of NE direction (Syrian Arc System).
Hydrocarbon potential evaluation in the study area using the available five wells clarifies that four of them are producing wells while the fifth one is a dry well.
The results of interpretation from the integrated geophysical methods propose new potential locations as prospects for future exploration. The original oil in place (OOIP) for those promising prospects (A, B and C) in an oil reservoir of the Nubia Formation has been estimated.