Heterostegina zone carbonates, southeastern Louisiana-offshore Mississippi: Petrography, seismic stratigraphy, hydrocarbon potential
- Louisiana State Univ., Baton Rouge, LA (United States)
A biostratigraphically calibrated electric log section about 106 miles long through 11 exploratory wells drilled in nearshore waters of southeastern Louisiana and western Mississippi reveals a thick (387-1000 ft) section of carbonates both above and below the Heterostegina zone. lithologic logs of four cores (total 229 ft) from the zone, and petrographic analysis of 45 thin sections cut from these cores, indicates the presence of hermatypic framework and binding organisms that constructed reefal or algal mound accumulations. These buildups accumulated along a Late Oligocene-Early Miocene rimmed accretionary carbonate shelf. About 160 miles of seismic line, shot roughly perpendicular to this shelf edge, confirms the presence of these bioherms in the subsurface. Oil shows in the relatively thick porous and permeable carbonates both above and below the Heterostegina zone interval, the regional unconformities at the top and bottom of these limestones, and the listric faults at the Heterostegina zone hinge line, indicate that additional Frio-Anahuac hydrocarbon reservoirs await discovery in this neglected frontier area of the Gulf Coastal Province.
- OSTI ID:
- 5755331
- Report Number(s):
- CONF-921058--
- Journal Information:
- Geological Society of America, Abstracts with Programs; (United States), Journal Name: Geological Society of America, Abstracts with Programs; (United States) Vol. 24:7; ISSN GAAPBC; ISSN 0016-7592
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
AQUATIC ORGANISMS
CARBONATE ROCKS
DEVELOPED COUNTRIES
ELECTRIC LOGGING
EXPLORATORY WELLS
FOSSILS
GEOLOGIC DEPOSITS
GEOLOGY
LITHOLOGY
LOUISIANA
MINERAL RESOURCES
MISSISSIPPI
NORTH AMERICA
OFFSHORE SITES
ONSHORE SITES
PALEONTOLOGY
PETROGRAPHY
PETROLEUM DEPOSITS
PETROLOGY
RESOURCE POTENTIAL
RESOURCES
ROCKS
SEDIMENTARY ROCKS
STRATIGRAPHY
USA
WELL LOGGING
WELLS