Part 4 - Berg - Hughes Center

etter Hosston fields in north Louisiana were located in Bienville, Webster, Jackson,
Caldwell, and Ouachita Parishes. The more favorable environments were then
extrapolated to the southeast into Caldwell, Richland and Franklin Parishes, and with less
certainty to the southwest into De Soto and Red River Parishes.
Based on these earlier studies, operators in north Louisiana and east Texas are now
aware that the Hosston Formation has characteristically low porosity and permeability
values and that both environment of deposition and diagenesis control variations in
reservoir quality of these sandstones (Swain, 1944; Saucier, et al., 1985; Dutton and
Finley, 1988). Late-stage diagenetic events include cementation by calcite and anhydrite
as well as isolated occurrences of intergranular albite cementation. Channel sands of the
lower Hosston maintain the highest consistent reservoir qualities. The oil and gas
accumulations discovered to date are found predominantly in fine- to medium-grained
sandstone reservoirs (approximately 40) from alluvial, fluvial-deltaic, and shallow marine
shelf depositional environments. The porosities (10 to 26%) and permeabilities (10 to 250
md) observed in the gas prone reservoirs of Bassfield field in Mississippi, and fields in
east Texas and northern Louisiana are the result of excessive compaction and
cementation (Dutton and Finley, 1988; Mitchell-Tapping, 1981).
The Lower Cretaceous Travis Peak Formation of east Texas as well as its equivalent,
the Hosston Formation of northern Louisiana and Mississippi, is a gas-bearing sandstone
that has low permeability and requires hydraulic fracture treatment to produce gas at
economic rates (Dutton and Finley, 1988; Dutton et al., 1990, 1993; Davies et al., 1991).
Although a few thin zones near the top of the Travis Peak in east Texas have permeability
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