الفهرس 
Geologic settingOnly 14 pages are availabe for public view
 |  | from | 212 |  |  |
| | | from | 212 | | |
Abstract
The present study throws light on the seismic interpretation of Wadi Natrun area with special emphasis to the subsurface structures of the Aptian top and base Lower Cretaceous. The study also deals with formation subsurface evaluation aqd hydrocarbon potentialities of Lower Cretaceous Formations (Shaltut and ~harita” Formations). The area is penetrated by seven wells named, Birigat-1, Tahrir-1, Wadi Natrun-1 (WNX-I), NWD-343-1, Natrun Ghibli A-1, T-56 and T-57. Three wells were selected in the study area, namely : Birigat-1, Natrun Ghibli A-1 and T-56 wells. The subsurface sequence penetrated by these three wells consists mainly of a sedimentary section ranging in age from Jurassic to Pliocene. The area forms part of the unstable shelf area which lies between the stable shelf in the south and miogeosynclinal basinal area in the north. This part has been subjected to tectonic forces. It is considered as a zone of alternating local uplifts and troughs which are separated by NE-SW subparallel faults. The Natrun basin is considered the largest Jurassic basin in the Western Dersert. This area was the site of deposition of thick mixed marine and non-marine sand and mud with abundant peat. The Lower Cretaceous clastic series corresponds to a transgressive cycle, with fluvio-continental sediments at the beginning (Neocomian) and the end (Upper Albian - Lower Cenomanian) with a transition near shore to delatic environment during Early Aptian and Albian. A maximum transgressional phase occurred during Middle and Late Aptian.