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The
testing of the #1 Woodruff,
the first commercial oil well drilled in Mississippi (discovery
well for the 230 MMBO Tinsley Field), in 1939 (photo by
Frank Noone) |
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Vision Exploration / MGS
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Photomicrograph of Smackover ooid, clast |
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Above:
Portion of
diamond core showing sucrosic porosity within Upper Smackover,
Escambia County, Alabama. This core was cut from the Pruet
#1 ATIC Unit 10-11. The crescent-shaped depression is the location
of a plug earlier removed for analysis: porosity was measured to
be 16.8% and permeability totaled 693
md. |
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Left:
Portion of diamond core showing dolomitized cross-bedded oolites deposited
in a high-energy nearshore environment; the buff-colored matrix is
impermeable micrite. From the Upper
Smackover, west central Washington County, Alabama. |
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Quarter-section of
wireline diamond core showing rare occurrence of well-rounded
quartz pebbles deposited in an oolitic matrix.
Smackover, Northwest Louisiana. |
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Interested in
the Black Warrior Basin Deep Knox Gas Play?
Click here to view
Stu Welch's paper. |
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Check out the Energy Information Administration's
excellent website! |
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Left:
photograph of subrounded Selma Chalk pebbles that were
encountered in a large (one mile wide, 400' thick) canyon cut
through the Upper and Middle Wilcox, Warren County,
Mississippi. The (Upper Cretaceous) Selma Chalk
pebbles comprised most of the 400' thick
canyon fill.

Right: actual structural cross section through the canyon,
utilizing four wells: the canyon is evidenced on the SP log
for each well as a nondescript "straight line" section,
obliterating the typical sand and shale sequence of the
Wilcox. It is believed that the canyon is Tallahatta
or Meridian in age and Selma Chalk pebbles from a nearby
outcrop were transported into the canyon. |
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Workover
Rig at Wellsite |
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Pre-loess porphyritic
rhyolite cobble clast exhibiting typical
flow-banding structures. The phenochrysts visible in this
specimen have been badly weathered resulting in pitting on the
outer surfaces . The presence of unusual clasts like this can
help differentiate the Pre-loess Terrace Deposits of the
ancestral Mississippi River from the Citronelle Formation
in Southwest Mississippi. This specimen is from Clear Creek, a
tributary of the Big Black River in Warren County, near the town
of Bovina. |
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GCAGS Transactions are now available on
DVD.
1951 to
Present, Complete.
See the
March 2008 Bulletin for more details. |
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