Sequence
Stratigraphy and Sands Geometry of the Langhian
Sequences in East Zeit Field,
Farhoud, Khamis Sherif, Tarek Abdel
Fattah Kamel, Heider Osman Saad, East Zeit Petroleum Company,
Despite the complication of seismic data in the Gulf of Suez by
the extensive Late Miocene evaporite cap, a seismic
sequence
stratigraphic
analysis
has been conducted on
the Langhian sequences in
well
control in the
area allowed effective calibration and integration the seismic data to
correlate these Miocene sequences. Within the context of
sequence
stratigraphy concepts, these wells and seismic sections
were divided into a series of 3rd order depositional sequences, chronostratigraphic maximum flooding surfaces and
sequence
boundaries, which are age dated with high resolution biostratigraphy
and stratigraphic
analysis
, and have been correlated
within the framework of the global cycle-chart. Subsequently, these 3rd order
depositional sequences are subdivided into systems tracts on the basis of
characteristic lithology, paleobathymetry,
well
-
log
signature and synthetic modeling. Beyond the seismic scale, the
individual system tract was also subdivided into a series of “Parasequences” on the same mentioned basis, which permitted
well
-by-
well
correlation on a higher resolution scale. This type of stratigraphic
analysis
enabled a more accurate delineation
and mapping of the sand geometry for these two systems tracts that permitted
the definition of the play concept for these reservoir sands; as deep marine turbidites and submarine fans controlled by paleostructural-highs and low relief areas generated by basinal block faulting and tilting at Langhian
time.