Geological and Geophysical studies for the Miocene reservoir in El Tamad oil Field, Onshore Nile Delta.
Amr Mahmoud Mohamed Ahmed;
Abstract
El Tamad Field, lies south of Abu Madi, East Delta and Mansoura
development leases, in the onshore Nile Delta, Egypt. This field, was
discovered in 2005 with a reservoir sequence dated as Messinian in age and
considered the firstly proven field for the presence of oil in the onshore Nile
Delta. This discovery reoriented the hydrocarbon exploration strategy in the
Nile Delta, changed the philosophy of Messinian entrapment and petroleum
system, so, starting a campaign between all petroleum companies for oil
seeking. The present work deals with the oil entrapment, structural
configuration, petrophysical model and depositional characteristics of
El Tamad Qawasim reservoir.
El Tamad trap is a combined structural and stratigraphic type formed by
a three-way dip closure bounded to the south by a normal fault trending E-W.
Messinian sediments in the study area have considerable thickness, with
prospective hydrocarbon potentiality, despite of the structural effect of the
Hinge Zone and erosion process. Messinian sedimentary package, patterned
in wedged shape towards the north, resulted from rotation on faults planes.
The Pliocene Kafr El Sheikh shales provide an ideal vertical seal, while intraformational
shales and the impermeable facies juxtaposition along the
southern bounding fault create a lateral seal.
The sedimentation history for the penetrated section, had been
identified through utilization of biostratigraphic data, core description,
textural analysis and wire-line logs characteristic, with the assessment of
Cyclostratigrapic studies; where Messinian section is capped by Maximum
Flooding Surface, in addition to Highstand System Tract of Kafr El Sheikh
XI
Formation and underlies by Highstand System Tracts of Tortonian section.
Qawasim reservoir defined as Lowstand System Tract, lies between
Trangrassive System Tracts as an upper boundary” and Highstand System
Tracts represents lower boundary. Qawasim reservoir is consists of three
sequential Lowstand Parasequence, with distinguishable facies.
The reservoir is interpreted as a stacked barrier-island bar with obvious
tidal effect and associated lagoonal deposits. The reservoir takes the
geometry of an east-west oriented elongate bar dissected by a tidal channel
trending NW-SE direction. This reservoir varies in thickness with the greatest
thickness existing along the bar axis, and thins towards the north at the bar
flanks.
Geochemical studies revealed that, the oil has been generated from Late
Cretaceous to Oligocene rocks at the early stage of the mid-oil window
maturity (RO=0.85%); the source rock deposited in shallow marine
environment under oxic to sub-oxic conditions contains mainly terrigenous
organic matter of mixed type II/III kerogen
development leases, in the onshore Nile Delta, Egypt. This field, was
discovered in 2005 with a reservoir sequence dated as Messinian in age and
considered the firstly proven field for the presence of oil in the onshore Nile
Delta. This discovery reoriented the hydrocarbon exploration strategy in the
Nile Delta, changed the philosophy of Messinian entrapment and petroleum
system, so, starting a campaign between all petroleum companies for oil
seeking. The present work deals with the oil entrapment, structural
configuration, petrophysical model and depositional characteristics of
El Tamad Qawasim reservoir.
El Tamad trap is a combined structural and stratigraphic type formed by
a three-way dip closure bounded to the south by a normal fault trending E-W.
Messinian sediments in the study area have considerable thickness, with
prospective hydrocarbon potentiality, despite of the structural effect of the
Hinge Zone and erosion process. Messinian sedimentary package, patterned
in wedged shape towards the north, resulted from rotation on faults planes.
The Pliocene Kafr El Sheikh shales provide an ideal vertical seal, while intraformational
shales and the impermeable facies juxtaposition along the
southern bounding fault create a lateral seal.
The sedimentation history for the penetrated section, had been
identified through utilization of biostratigraphic data, core description,
textural analysis and wire-line logs characteristic, with the assessment of
Cyclostratigrapic studies; where Messinian section is capped by Maximum
Flooding Surface, in addition to Highstand System Tract of Kafr El Sheikh
XI
Formation and underlies by Highstand System Tracts of Tortonian section.
Qawasim reservoir defined as Lowstand System Tract, lies between
Trangrassive System Tracts as an upper boundary” and Highstand System
Tracts represents lower boundary. Qawasim reservoir is consists of three
sequential Lowstand Parasequence, with distinguishable facies.
The reservoir is interpreted as a stacked barrier-island bar with obvious
tidal effect and associated lagoonal deposits. The reservoir takes the
geometry of an east-west oriented elongate bar dissected by a tidal channel
trending NW-SE direction. This reservoir varies in thickness with the greatest
thickness existing along the bar axis, and thins towards the north at the bar
flanks.
Geochemical studies revealed that, the oil has been generated from Late
Cretaceous to Oligocene rocks at the early stage of the mid-oil window
maturity (RO=0.85%); the source rock deposited in shallow marine
environment under oxic to sub-oxic conditions contains mainly terrigenous
organic matter of mixed type II/III kerogen
Other data
| Title | Geological and Geophysical studies for the Miocene reservoir in El Tamad oil Field, Onshore Nile Delta. | Other Titles | دراسات جيولوجيه وجيوفزيقيه لخزان الميوسين فى حقل التمد ودلتا النيل البريه | Authors | Amr Mahmoud Mohamed Ahmed | Issue Date | 2014 |
Recommend this item
Similar Items from Core Recommender Database
Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.