Heterostegina zone carbonates, southeastern Louisiana-offshore Mississippi: Petrography, seismic stratigraphy, hydrocarbon potential

Conference · Wed Sep 01 04:00:00 EDT 1993 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:6850637

Krutak, P R ^[1]; Beron, P Jr

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1. Louisiana State Univ., Baton Rouge, LA (United States) Fort Hays State Univ., Hays, KS (United States)

A biostratigraphically calibrated electric log section approximately 106 mi 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 Heterostegina 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 mi of seismic line, short roughly perpendicular to this shelf edge, confirms the presence of these buildups in the subsurface. Oil shows in the relatively thick porous and permeable carbonates both above and below the Heterostegina zone interval, regional unconformities at the top and bottom of these carbonates, and the listric faults at the Heterostegina zone hinge line indicate that additional Frio-Anahuac hydrocarbon reservoirs await discovery in this neglected [open quotes]frontier[close quotes] area of the Gulf Coastal Province.

• OSTI ID: 6850637
• Report Number(s): CONF-9310237--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 77:9
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
CARBONATE ROCKS
DEVELOPED COUNTRIES
DRILLING
EXPLORATORY WELLS
GEOLOGIC DEPOSITS
GEOLOGY
HYDROCARBONS
LITHOLOGY
LOUISIANA
MINERAL RESOURCES
MISSISSIPPI
NATURAL GAS DEPOSITS
NORTH AMERICA
OFFSHORE DRILLING
ORGANIC COMPOUNDS
PETROGRAPHY
PETROLEUM DEPOSITS
PETROLOGY
RESERVES
RESERVOIR ROCK
RESOURCE POTENTIAL
RESOURCES
ROCKS
SEDIMENTARY ROCKS
STRATIGRAPHY
US GULF COAST
USA
WELLS