الفهرس 
chapter One: introductionOnly 14 pages are availabe for public view
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Abstract
Sequoia Field is located in West Delta Deep Marine (WDDM) concession, which is a part of the western offshore Nile Delta of Egypt. The main purpose of the present study is utilizing the structure, stratigraphy, lithology and petrophysics of the Pliocene reservoir in the Sequoia Field to reconstruct a robust static 3D reservoir model. This model will represent the reference scenario for calculating the volume of the hydrocarbons in place and it is useful for subsequent dynamic modelling. The present study is based mainly on the integration of the available 3D seismic, well logging data and core data from four wells (Sequoia-D1 & D6, Rosetta- 10 and Sapphire-1).
The vertical distribution of hydrocarbon is presented and explained through the Litho-saturation cross plots of the Wastani Formation in the four wells. These plots in the four wells show that the main lithology is claystone with streaks of sandstone and siltstone, while the reservoir in Sequoia Field is mainly sandstone with shale interbeds. The average calculated shale volume, porosity and water saturation of Sequoia reservoir ranges from 14% to 58 %, 18% to 32 % and 38% to 68% respectively. The resulted petrophysical parameters of the studied reservoir indicate its good quality.
The outputs of the seismic interpretation are used for the 3D stratigraphic and structural modelling, which incorporated through the fault modelling, pillar gridding and the vertical layering processes. A facies model is built to identify the distribution of the different facies changes of the studied reservoir.
The static geomodel is depending on the interpretations of seismic and inversion data and all well log analysis to provide better water predictions and planning of additional wells if needed. The model will be the foundation for dynamic modelling and will benefit in any additional field development planning.
The calculated original hydrocarbon in place using the constructed 3D geological model of the studied reservoir measured based on polygons and channel incisions (defining separate channels inside those polygons) to be reflecting reservoir heterogeneity of the field. The estimated volume of gas initial in place (GIIP) at all these regions is about 1708.01 BCF.