الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 233 |  |  |
| | | from | 233 | | |
Abstract
The study area extends between Hamata in the south to Ras Honkorab in the north with about 41 km in length and 10 km in width along the Egyptian Red Sea coast. It is delineated by latitudes 240 16\, 240 34\ N and longitudes 350 03\, 350 21\ E. Different previous literatures of the Neogene and Pleistocene sediments have concentrated on the stratigraphy, sedimentology, mineralogy and tectonic control on sedimentation, while the petrophysical studies are relatively scarce. Therefore, focal point of this research is to evaluate the petrophysical characters of the Miocene, Pliocene and the Plio-Pleistocene sediments of the concerned area.
The sedimentary sequence of the investigated area ranges in age from Oligocene (Abu Ghusun Formation), to Miocene (Ranga, Um Mahara, Siyatin, Abu Dabbab and Um Gheig formations), Upper Miocene?-Pliocene (Marsa Alam Formation), Pliocene (Shagra Formation) and Plio-Pleistocene (Samadai Formation).
Two hundred and eighty two rock samples from thirty three measured columnar sections were collected. About one hundred and eighty five samples were selected for coring through Universal Core Grinder and Drill. Then, a series of measurements were performed to determine porosity (mercury injection porometer) and permeability (gas permeameter).
The common diagenetic aspects for these formations include dolomitization, dissolution, recrystallization, cementation and impregnation by hydrocarbon inclusions. The occurrence of surface bitumen shows of Upper Miocene-Pliocene sediments, at Wadi Mastoura, may attribute to renew information on hydrocarbon habitat and oil exploration for the Egyptian part of the Red Sea.
The obtained petrophysical results of this study are used to recognize that porosity and permeability which initially depend on the textural characteristics like; grain size, sorting, and matrix content, are altered significantly in the course of diagenesis. Also, we can summarize the quality of the syn-rift formations that varied from fair to excellent reservoir rock characters (according to Leverson, 1967), whereas Um Mahara and Marsa Alam (Gabir Member) formations were found to have high petrophysical quality.