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Abstract
Gulf Coast Association of Geological Societies Transactions
Volume 54 (2004)
EXTENDED ABSTRACT: New Field Discoveries
in Chandeleur Sound, Offshore Louisiana
John, C.J.1, Jones, B. L.1, Harder,
B. J.1, Bourgeois, R. J.1, and Miller, M. B.1
ABSTRACT
Phillips Petroleum Company discovered the first
oil and gas field in the Chandeleur Sound Area, offshore St. Bernard Parish,
Louisiana. There have been twenty-two subsequent discoveries. Since the
last field discovery in 1994 renewed activity has resulted in four new field
discoveries during 2002, three during the first half of 2003 and restored
production in two older fields. New discoveries are located in Chandeleur
Sound Blocks 26, 31, 67, 68, Chandeleur Sound Addition Blocks 27, 51, and
Chandeleur Sound West Block 28. A total of 29 oil and gas fields have been
discovered as of June 30, 2003. Typical representative fields are Blocks
58, 71, the Stuards Bluff field and East Stuards Bluff field. These are discussed
in detail.
Hydrocarbon production depths generally range
from 5,038 feet to 9,300 feet with production from three to six zones in
the Bigenerina humblei, Cibicides carstensi and Textularia W biozones
of Middle to Upper Miocene age. Structures in the area are mostly fault closures
against a large, down to the south, regional growth fault that strikes east
to west. Detailed analyses of old and new geological and geophysical information
plus advances in modern technology have brought forth this surge of success
even in the undeveloped areas of the Sound and the Sound Addition to the
north.
The primary objective has been exploration of
the Middle Miocene Textularia W zone. New productive Textularia
W sands have also been found in two old depleted fields. This finding
should renew interest in re-evaluating the older fields and exploring for
new ones in this trend.
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