Search In this Thesis
   Search In this Thesis  
العنوان
Structural Controls and characterization of Lower Cretaceous Reservoirs, Matruh Basin, Northern Western Desert, Egypt /
المؤلف
Mohamed, Marwa Yousef Rizk.
هيئة الاعداد
باحث / مروة يوسف رزق محمد
مشرف / عادل رمضان مصطفى
مشرف / ويليام بوسورث
تاريخ النشر
2023.
عدد الصفحات
186 p. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
الجيولوجيا
تاريخ الإجازة
1/1/2023
مكان الإجازة
جامعة عين شمس - كلية العلوم - الجيـولوجيـا
الفهرس
Only 14 pages are availabe for public view

from 186

from 186

Abstract

The study area is geographically located in the West Kanayes concession in the eastern part of the Matruh Basin and covers an area of 835 km2. It is bounded by latitudes 30° 45` and 30° 59` N and by longitudes 27° 33` and 27° 56` E. Being part of the structurally complex northeast African margin, the Matruh Basin underwent multiple phases of Mesozoic-Cenozoic deformation. Detailed structural analysis of the subsurface structures of this basin, using high-quality 3D seismic and well datasets, has identified two main fault sets:
1) Jurassic- Early Cretaceous (Barremian) NNE-striking normal faults; and 2) Late Cretaceous NW-striking normal faults. The older NNE-striking normal faults were later inverted due to Late Cretaceous compression forming fault- propagation folds (inversion anticlines) above their upper tips. This positive inversion initiated with the “Santonian Event” and continued into the Early Cenozoic. The NW-striking normal faults were not inverted due to their unfavorable orientations.
Most inversion structures in the greater Western Desert trend ENE- WSW and reflect the reactivation of similarly oriented pre-existing normal faults. The NNE orientation of the old, major extensional structures in the Matruh Basin and the resulting control on the later inversion fabric reflects a very different fault architecture. This has dramatically impacted sedimentation patterns and potential hydrocarbon accumulations. Matruh Basin illustrates the complexities that can be present along the North African Neotethyan margin and underlines the necessity to avoid regional generalizations where gaps in data may be present.
The shale-dominated facies of Dahab Formation have a higher probability distribution when compared to the sandstone-, followed by siltstone- and carbonate-dominated facies in decreasing order of abundance. Based on structural mapping and detailed well log correlations, the lower part of Dahab Formation is preserved in some wells, whereas the upper part of the formation is mostly faulted out in the studied wells. Late Cretaceous NW- striking normal faults post-date the deposition of the Dahab Formation. The Dahab Formation was deposited during a time of tectonic quiescence.