Part 4 - Berg - Hughes Center
Part 4 - Berg - Hughes Center
Part 4 - Berg - Hughes Center
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Taylor Group<br />
Producing Parishes<br />
Caddo, Bossier, Webster, Claiborne,<br />
Bienville, De Soto, Red River, Sabine<br />
The Taylor Group averages 300 ft thick in north Louisiana and includes the Saratoga<br />
Chalk, Marlbrook Marl, Annona Chalk, and the more siliciclastic Ozan Formation<br />
(Cullom et al., 1962). These are primarily shallow marine deposits consisting of hard,<br />
gray glauconitic fossiliferous chalk, calcareous shale, marl, fine-grained sandstone and<br />
siltstone on the Sabine Uplift and in south Arkansas. In Vernon Parish, these deposits<br />
were probably deeper water limestones. In Sabine Parish, production of light oil and<br />
condensate from the Saratoga and Annona has been reported (Cameron, 1963; Woods,<br />
1963). Where Taylor reservoirs produce in northern Louisiana they are located from<br />
1,250 to 2,900 ft in depth. Production of light oil and condensate is derived from the<br />
deeper reservoirs with fracture porosity of 20 to 33% and permeability ranging from 100<br />
to 1000 md. Farther to the north in Caddo Parish, the basal siliciclastic Ozan Formation is<br />
productive. The Ozan productive interval is called the Buckrange, located at 1,750 ft in<br />
the subsurface and averaging 30 ft thick. The reservoir consists of fine- to medium-<br />
grained calcareous and argillaceous sandstone interbedded with calcareous shale.<br />
According to Cullom et al. (1962), the greatest overall concentration of sands in the Ozan<br />
Formation is in southern Arkansas and northwest Louisiana, but coarse siliciclastics may<br />
be present to the south of the Sabine Uplift as well.<br />
Navarro Group<br />
Producing Parishes<br />
Caddo, Bossier,<br />
Claiborne, Union<br />
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