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Preface
Author(s) -
Ali Syed F.,
Fornai Francesco
Publication year - 2006
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1196/annals.1369.067
Subject(s) - annals , citation , library science , philosophy , classics , computer science , history
The Tut oil field is located in the northwestern part of the Western Desert. This work aims to study the reservoir characteristics, to evaluate the hydrocarbon potentiality of the Upper and Lower Safa Members based on the available subsurface data obtained from open-hole well log records of four wells distributed in the study area. The subsurface geologic setting, in terms of defining the stratigraphic and structural settings, is gained through the construction of varying aligned stratigraphic, structural cross sections isopach and lithofacies maps. The petrophysical evaluation, in terms of determining the reservoir properties, net-pay thickness, shale content (Vsh), effective porosity (∅eff), water saturation (Sw) and hydrocarbon saturation (Sh), are acquired through quantitative computer processed interpretation. The results of the petrophysical analysis, that achieved on the study area using the wire line log, response to perform the vertical and the lateral distribution of the reservoir characteristics, in the form of litho-saturation cross-plots, iso-parametric maps and lithologic-matrix cross-plots. The obtained results indicate that interested horizons of 3 zones: (Upper Safa-Top, Upper Safa-Bottom and Lower Safa-Top), within the middle Jurassic succession, TUT oil field are hydrocarbon charged. The upper most part of Upper Safa Member: (Upper Safa-Top) reservoir, represent oil producing from shallow marine to alluvial sediments. The Lower most part of Upper Safa Member: (Upper Safa-Bottom) reservoir, represent gas producing from a thick alluvial sand body. Finally, the upper most part of Lower Safa Member: (Lower SafaTop) reservoir, represent oil-gas producing from shallow marine sediments with high terrestrial input. The isoparametric maps show that northern and central parts of the study area are the most favorable parts for hydrocarbon accumulation due to the increase in net-pay thickness and average effective porosity and decrease in water saturation toward these parts. The most prospective area is located at the central and northern parts of Tut field. It is recommended to focus the exploration activities on these parts in future. Corresponding Author: Abdel Moktader A. El Sayed