FACIES ARCHITECTURE AND SEQUENCE STRATIGRAPHY OF THE CONIACIAN. SANTONIAN MIXED SILICICLASTICCARBONATE MATULLA FORMATION,.
6/27/2015
Abstract: FACIES ARCHITECTURE AND SEQUENCE STRATIGRAPHY OF THE CONIACIANSANTONIAN MIXED SILICICLASTICCARBONAT…
Start |Author Index | View Uploaded Presentations | Meeting Information SouthCentral Section 49th Annual Meeting (19–20 March 2015) Paper No. 228 Presentation Time: 9:00 AM4:00 PM
FACIES ARCHITECTURE AND SEQUENCE STRATIGRAPHY OF THE CONIACIAN SANTONIAN MIXED SILICICLASTICCARBONATE MATULLA FORMATION, WEST CENTRAL SINAI, EGYPT EL BELASY, Ahmed1 , GRAMMER, G. Michael1 , GENEDI, Adel2 , WANAS, Hamdalla3 and ANAN, Tarek2 , (1)Boone Pickens School of Geology, Oklahoma State University, Noble Research Center, Stillwater, OK 74078, (2)Department of Geology, Mansoura University, Mansoura, 35516, Egypt, (3)Department of Geology, Mnoufia University, Shebin ElKom, 32511, Egypt In the Gulf of Suez region, the most prolific oil fields in Egypt, the sediments of the ConiacianSantonian Matulla Formation contain both reservoir and source rocks. Outcrops of the Matulla Formation at west central Sinai (eastern side of the Gulf of Suez) provide a useful analog to these subsurface reservoirs by providing insight into the facies heterogeneity resulted from the interbedding of siliciclastic and carbonate rocks. The Matulla Formation was studied in four outcrops in west central Sinai (Wadi Matulla, Wadi Budra, Gebel Ekma, and Gebel Qabaliat), to determine facies associations, depositional environments, facies stacking patterns and constrain a high resolution sequence stratigraphic framework. The study revealed that the Matulla Formation is composed of wave and tide influenced mixed siliciclasticcarbonate rocks interbedded with some oolitic ironstone beds. Detailed facies analysis suggests deposition in coastal and shallow marine environments. The clastic facies are represented by conglomerate and planar laminated, cross bedded, bidirectional cross bedded, ripple cross laminated, flaser bedded, and massive sandstones, in addition to green sand, siltstone and shale. The carbonate facies are composed of limemudstone, skeletal and nonskeletal wackestone, packstone, and grainstone, as well as floatstone, rudstone and dolostone. Vertical and lateral facies successions revealed that the Matulla Formation is composed of three 3rd order depositional sequences made of up higher frequency 4th and 5th order sequences and cycles. The diagenetic alterations present, exerted a strong effect in the reservoir quality and heterogeneity of the sandstones and carbonates of the Matulla Formation, and are affected by relative sea level change.
Session No. 22Booth# 31 Sedimentation, Tectonics, and Petroleum from the Heartland to the Carribbean (Posters) Friday, 20 March 2015: 9:00 AM4:00 PM Starlight Terrace (OSU Student Union) Geological Society of America Abstracts with Programs. Vol. 47, No. 1, p.54 © Copyright 2015 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.
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