Concealed Canyons Delineation and Depositional Elements Analysis Applying a Multidisciplinary Geological and Geophysical Approach: A Case Study of the Pliocene Turbidites, West El-Burullus Area, Offshore Nile Delta, Egypt

Faculty Science Year: 2023
Type of Publication: ZU Hosted Pages: 25
Authors:
Journal: Arabian Journal for Science and Engineering Springer Volume:
Keywords : Concealed Canyons Delineation , Depositional Elements Analysis Applying    
Abstract:
Seismic geomorphology becomes more rigid with the incorporation of spectral decomposition with horizons attributes (RMS and Coherency) that help a depiction of the litho-morphological and facies distribution of concealed Kafr El-Sheikh Formation turbidity incisions (WEB canyon), recognizing reservoir trending and the canyon fairway which is trending NW-SE with a sinuous shape and channelized geometry. The turbidite facies association enriches grains finer to coarse from shaly sandstones that are deposited in a marine environment. Kafr El-Sheik Formation in the West El-Burullus area is mainly shale intercalated with turbidite sand bodies that are excellent reservoirs. Kafr El-Sheik Formation comprises a third-order sequence of turbidite units infilling the WEB canyon. The WEB canyon has five main sedimentary facies assembly from the undermost up; the basal lobe at the bottom of the WEB incised canyon, amalgamated channels fill, followed by splays, lobes, levees either proximal or distal facies, then the last plugged channels. All facies have different reservoir property that helps to delineate the best locations to develop the field and a new concept for analyzing the turbidite importance in exploration studies. The turbidity quality and its facies association with fructified medium to coarse-grained sandstones that are deposited in a submarine setting, with conspicuously high quality (either porosity or permeability) of the reservoir, representing the best facies for the area, should be considered in the adjacent concession areas of the West El-Burullus area. A complete paleo-geomorphological depositional model and canyon architecture are revealed and depicted from seismic geomorphology, seismic facies analysis, and sequence stratigraphy. Integrating these aspects with well logging accompanied by a petrophysical evaluation, made it clear to depict the heterogeneity/architecture, of the Kafr El-Sheikh reservoir. The revealed sedimentary facies (turbidite channels) provide a vigorous insight into considerable criteria for future exploration and development strategies. Alongside Kafr El-Sheikh reservoir sediments, points to good sedimentary facies (turbidite channels) that provide a vigorous insight into considerable criteria for future exploration and development strategies. Kafr El-Sheikh shales are considered vertical and lateral stratigraphic sealing for the intervals of the WEB reservoir. Additionally, a petroleum system with seal analysis research should be conducted to detect trapping and source/charge time coincident with identifying migratory paths to anticipate the greatest prospective places for hydrocarbon occurrence. Furthermore, by combining geophysical and geological data, channels and their structural settings can be identified and mapped, allowing new well locations to be optimized for future reservoir development. This solves one of the key challenges in the West El-Burullus area: "channel architecture and fairway delineation". Although hydrocarbon exploration mainly relies on channel-axis sedimentary sediments, our study also showed that the turbidity facies sweet spot was also found in overbank sedimentary distribution channels containing coarse-grained sandstones such as proximal levees and splays. It has been proven to be more promising than commonly thought.
   
     
 
       

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