TITLE:
Structural Effect on Hydrocarbon Trapping, North Western Nile Delta, Egypt
AUTHORS:
Elhamy A. Tarabees, Salah S. Azam
KEYWORDS:
Seismic Interpretation, Seismic Reflection, Velocity Analysis, Nile Delta, Hydrocarbon Accumulation
JOURNAL NAME:
International Journal of Geosciences,
Vol.7 No.3,
March
25,
2016
ABSTRACT: The present study aims to
interpret the available data, that derived from well logs and 2-D seismic
reflection data, in the area located northeast onshore Nile Delta, in order to
delineate its structural styles and its relation with the basement inferences
and regional tectonic, and also to detect the possible existence of hydrocarbon
accumulation at the Tertiary-Quaternary sedimentary section. The study area
lies between latitudes 30°31' and
31°17'N, and longitudes 30°38' and 31°21'E. Using the available well logs, the
average velocity gradients are calculated at El-Wastani, Kafr El Sheikh, Abu
Madi, Qawasim and Sidi Salem Formations and velocity contour maps are
constructed. The available 2-D seismic sections were interpreted and utilized
to construct the isochronous reflection maps to the tops of the fore-mentioned
five formations. These maps were converted into depth maps. The depth maps show
the predominance of three tectonic trends. The structure contour maps were used
to deduce the structural elements affecting the fore-mentioned formations in
the area under study. These maps reflect the abundance of the E-W trending
faults (sometimes ENE-WSW and in other times WNW-ESE), which characterize the
general Mediterranean Sea trend. The second system of structural deformations
is trending NE-SW (Syrian arc trend). The third type of faults is the NW-SE
trending features (Red Sea faults trend). By integrating the structure contour
maps together with the different kinds of maps have been done using different
sources of data such as velocity data, the possible locations that can be oil
traps for hydrocarbon accumulation have been detected.