Biostratigraphy and paleoenvironment implications of the Middle Miocene-Early Pliocene succession, El-Wastani gas field, onshore Nile Delta, Egypt

El-Kahawy, Ramadan M.; Aboul-Ela, Nabil; El-Barkooky, Ahmed N.; Kassab, Walid

doi:10.1007/s12517-021-08666-z

Cited by 3 publications

(1 citation statement)

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“…Due to modern exploration and use of geological and geophysical modelling approaches, this province provided some hidden hydrocarbon resources (EGPC, 1994). The Nile Delta is characterized by a thick sequence of Neogene clastic deposits, which represent one of the most significant gas provinces in Egypt (El-Heiny et al, 1990;Abdel al et al, 2000;El-Barkooky and Helal, 2002;Ismail et al, 2010;El-Kahawy et al, 2022;Selim et al, 2022). The Messinian onshore Nile Delta reservoirs were sedimentologically assessed, and their significant potential as reservoirs was confirmed (Selim et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Bio-sequence stratigraphy of the Neogene: an example from El-Wastani gas field, onshore Nile Delta, Egypt

El-Kahawy,

Aboul-Ela,

El-Barkooky

et al. 2023

J. Micropalaeontol.

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Abstract. Due to modern hydrocarbon development and exploration activities throughout the onshore Nile Delta of Egypt, a high-resolution biochronologic sequence stratigraphy of the Neogene sequence was conducted to illustrate the gas-bearing reservoirs' depositional sequences. Our study used a multidisciplinary approach comprising biostratigraphy, facies analysis, geophysical logs, and seismic data to shed light on the Neogene stratigraphic framework. The biostratigraphic analysis of planktonic foraminifera and calcareous nannofossils allowed the recognition of six zones and/or subzones and nine zones, respectively. An open-shelf environment was suggested for the Middle–Upper Miocene Sidi Salem Formation, while the Upper Miocene Qawasim and Abu Madi formations were deposited under stressed environmental conditions interpreted as estuary facies. The Lower Pliocene (Zanclean) succession deposited in the middle to outer shelf domains, including the upper-bathyal environments. Seven depositional sequences bounded by six major sequence boundaries were recognized from Serravallian to Zanclean times. These boundaries significantly influenced changes in reservoir properties and architecture of the incised valley fills. The sea-level oscillations are interpreted by correlating the sequence boundaries and flooding surfaces with global eustatic charts.

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