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Dissertation/Thesis Abstract

Geologic analysis of the Upper Jurassic Cotton Valley Formation in Jefferson County, Mississippi
by Brooke, James Michael, M.S., Mississippi State University, 2014, 92; 1570118
Abstract (Summary)

Though the Cotton Valley Group is productive in Mississippi, Louisiana, and Texas, little is known about production potential of the Bossier Formation (Lower Cotton Valley Shale) in southwest Mississippi. The Bossier Formation in Jefferson County, Mississippi is an organic-poor, carbonate-rich mudrock with siliciclastic intervals. Examination of cuttings by petrographic and scanning electron microscopy revealed fractures that have been filled by calcite and pore-filling pyrite. Porosity exists within and around pyrite framboids, in unfilled fractures, and within peloid grains. Organic matter is rare in Lower Cotton Valley samples suggesting it is not self-sourcing. Total Organic Carbon (TOC) values are low (0.86-1.1% TOC) compared to the productive Haynesville Shale Formation (2.8% TOC). Porosity of the Lower Cotton Valley Shale is low (2.5-4.2%) compared to productive Haynesville Shale Formations (8-12%). With current technology and gas prices, the Lower Cotton Valley Shale in Jefferson County, Mississippi does not have production potential.

Indexing (document details)
Advisor: Kirkland, Brenda L.
Commitee: Scmitz, Darrel W., Skarke, Adam
School: Mississippi State University
Department: Geosciences
School Location: United States -- Mississippi
Source: MAI 54/02M(E), Masters Abstracts International
Source Type: DISSERTATION
Subjects: Geology, Petroleum Geology, Sedimentary Geology
Keywords: Bossier formation, Cotton valley group, Electron microscopy, Haynesville formation, Shale gas, Thermal maturity
Publication Number: 1570118
ISBN: 978-1-321-38013-2
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