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العنوان
GEOLOGICAL AND GEOPHYSICAL STUDIES IN RAS
BUDRAN OIL FIELD, GULF OF SUEZ - EGYPT /
المؤلف
Galal, Ahmed Essam Eldin Mohamed.
هيئة الاعداد
باحث / Ahmed Essam Eldin Mohamed Galal
مشرف / Mohamed Hamed Abd El Aal
مشرف / Abd El-Moneim Ahmed Mahmoud
مناقش / Wafaa Abd-Elaziz Ali
تاريخ النشر
2014.
عدد الصفحات
155 P. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الجيولوجيا
تاريخ الإجازة
1/1/2014
مكان الإجازة
جامعة عين شمس - كلية التربية - قسم العلوم البيولوجية والجيولوجية
الفهرس
Only 14 pages are availabe for public view

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Abstract

SUMMARY AND CONCLUSION
Ras Budran Oil Field can be considered as one of the offshore oil fields, which is located in north Belayim offshore area, some 4 Kms. from Sinai Gulf of Suez coast and 13 Kms. north west Abu Rudeis. The main issue of the study deals essentially with understanding the nature of the geologic events and tectonic evolution of Ras Budran Field and their effect on hydrocarbon exploration through interpretation of the available 3D seismic data.
In the study area, a number of depth contour maps were constructed for the tops of different horizons including Zeit Formation, South Gharib Formation, Belayium Formation, Kareem Formation, Rudeis Formation, Nukhul Formation and Thebes Formation. Top Zeit Formation shows an increase in depth towards the western and northwestern directions and a decrease towards the southeastern and eastern parts. Top South Gharib Formation reveals an increase in depth towards the northern, northwestern and eastern directions and a decrease towards the southern and southwestern parts. Top Belayium Formation exhibits an increase in depth towards the northwestern and eastern directions and a decrease towards the southwestern parts. Top Kareem Formation shows an increase in depth towards the northwestern and northern directions and a decrease towards the central part. Top Rudeis Formation reveals an increase in depth towards the northwestern and western directions and a decrease towards northeastern and central parts. Top Nukhul Formation reflects an increase in depth towards the northwestern and southwestern directions and a decrease towards the central part. Top Thebes Formation presents an increase in depth towards the south and southwestern directions and a decrease towards the central part.
Moreover, isocore contour maps were constructed for the same horizons. Zeit Formation shows an increase of thickness towards the eastern direction and a decrease in the central western part. South Gharib Formation reveals an increase in thickness towards the southwestern part and a decrease in the north eastern part. Belayium Formation exhibits a decrease in thickness in the eastern parts. Thickness of Kareem Formation increases towards the western and the north western parts and decreases gradually towards the north and northeast directions. Rudeis Formation exhibits an increase in thickness towards the northwestern part and a decrease in the central parts. Nukhul Formation reveals an increase in thickness towards the northeastern and southwestern part and a decrease in the central part. Thebes Formation shows a maximum thickness towards the central western part and a decrease in the northeastern and southwestern portions.
Seismic velocity analysis was conducted depending on the available sonic and composite logs. Average velocity, interval velocity, reflection coefficient and velocity heterogeneity maps for several horizons of Ras Budran Area were drawn and analyzed. The velocity heterogeneity map on Top of Zeit Formation exhibits a negative anomaly towards the north and a positive to the south. The velocity heterogeneity map on Top of South Gharib Formation reveals a positive anomaly to the southwestern portion and a negative anomaly everywhere else on the map. The velocity heterogeneity map on Top of Rudeis Formation displays positive anomalies towards the northern and central western portions and a negative anomaly to the southern part.
Seismic interpretations are carried out on twenty-six 3D seismic lines passing through the study area. Seismic facies and seismic sequence analysis were carried out over the Miocene succession. The different reflection configuration patterns and their stratigraphic boundaries were detected. The seismic facies of the first sequence (S1) of the Miocene succession are characterized by low to moderate amplitude and discontinuous horizons. On the other hand, high amplitude, continuous horizons and parallel to divergent configurations characterize the seismic facies of the second sequence (S2), reflecting an abrupt facies change to mainly evaporites during the deposition of Belayim Formation, accompanied by a marked decrease in the subsidence rate.
Moreover, the structural framework of the study area was investigated by making detailed structural analysis of the available seismic data. A number of seismic sections were interpreted and TWT and depth maps were constructed for the different studied horizons. A number of listric faults are revealed through the analysis. Rollover folds are found at the northeastern portion of the study area. The analysis also illustrates that, a graben block is found in the central part of the study area between the two groups of the normal faults in the northeastern and southwestern parts.