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Litho- and biostratigraphic evolution of the Upper Jurassic through top Cretaceous section, northern deepwater Gulf of Mexico; preliminary results

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Authors:Weimer, Paul; Zimmermann, Eric; Bouroullec, Renaud; Cumella, Steve; Adson, James; Gutterman, William; Payeur, Travis; Snyder, Brandon; Hirsh, Harrison; Bettinger, Daniel
Author Affiliations:Primary:
University of Colorado at Boulder, Department of Geological Sciences, Boulder, CO, United States
Other:
Texas Christian University, United States
LLOG Exploration Company, United States
Volume Title:66<sup>th</sup> annual convention of the Gulf Coast Association of Geological Societies, American Association of Petroleum Geologists Sectional Meeting; and the 63<sup>rd</sup> annual meeting of the Gulf Coast Section of the Society of Economic Paleontologists and Mineralogists
Volume Authors:Smith-Engle, Jennifer M., editor; editor
Source:Transactions - Gulf Coast Association of Geological Societies, Vol.66, p.569-582; 66>th` annual convention of the Gulf Coast Association of Geological Societies American Association of Petroleum Geologists Sectional Meeting; and 63>rd' annual meeting of the Society of Economic Paleontologists and Mineralogists, Gulf Coast Section, Corpus Christi, TX, Sept. 18-20, 2016, Jennifer M. Smith-Engle and editor. Publisher: Gulf Coast Association of Geological Societies, New Orleans, LA, United States. ISSN: 0533-6562
Publication Date:2016
Note:In English. 12 refs.; illus., incl. sects., 1 table, sketch maps
Summary:The stratigraphic evolution of the Upper Jurassic through top Cretaceous strata in the northern deepwater Gulf of Mexico is interpreted based on the well logs from 58 well penetrations. About 43% of the wells are present to the northeast associated with exploration of the Norphlet-Smackover play. The Oxfordian through Tithonian strata are penetrated in 25 wells, primarily to the northeast. At the base, log patterns indicate the eolian Norphlet facies were deposited primarily north of Middle Ground Arch; to the south, a non-productive mixed fluvial eolian facies is present. A major transgression resulted in deposition of the shallow marine Smackover limestone, 170 to 410 feet thick, and characterized by low gamma-ray and high resistivity values. The limestone is capped by a regional flooding surface, and overlain by marls and micritic limestone, 120 to 2600 feet thick. The continued water deepening resulted in Kimmeridgian-Tithonian shale-rich interval 220-2060 feet thick, the uppermost of which is a source rock. To the northeast, the Cretaceous section is 550 to 5500 feet thick and characterized by fine-grained carbonate with low gamma-ray values, punctuated by numerous thin, shale-rich intervals. These deposits are the downdip strata to the carbonate dominated platforms. To the northwest, logs indicate a more shale-rich section, likely caused by the presence of Upper Cretaceous deltas (Navarro and Mendoza shale). Cenomanian sandstones are present in two wells. Across the northern Gulf, portions of the Upper Cretaceous section were eroded by the KPg Chicxulub deposit. The amount of eroded section varies considerably across the area.
Subjects:Anhydrite; Biostratigraphy; Carbonate rocks; Clastic rocks; Cotton Valley Group; Cretaceous; Haynesville Formation; Jurassic; Limestone; Lithostratigraphy; Louann Salt; Mesozoic; Norphlet Formation; Oxfordian; Petroleum; Petroleum exploration; Reservoir properties; Sandstone; Sedimentary rocks; Seismic stratigraphy; Smackover Formation; Sulfates; Tithonian; Upper Jurassic; Well logs; Atlantic Ocean; Gulf of Mexico; North Atlantic
Coordinates:N260000 N290000 W0880000 W0960000
Record ID:816386-41
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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