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Abstract
Gulf Coast Association of Geological Societies Transactions
Volume 54 (2004)
EXTENDED ABSTRACT: Sabinas Basin
Lower Cretaceous to Jurassic Production- Comparison to South Texas Equivalents
Dyer, M.J.1 and
Bartolini, C.1
ABSTRACT
This paper will attempt to draw some analogies
to structural and stratigraphic similarities and differences between the
productive Lower Cretaceous/Jurassic strata of the Sabinas Basin in Mexico
with that of the San Marcos Arch area of South Texas where a wildcat drilled
in 1969 logged interesting gas shows in a lower Hosston dolomite. The possibilities
for production in the South Texas strata will be postulated based on these
analogies. Jurassic to Lower Cretaceous stratigraphy has been correlated
from the San Marcos Platform to the northern Burgos and Sabinas Basins of
northern Mexico. The correlations and analogs between the two are important
for exploration in South Texas. Lower Cretaceous to Jurassic strata of the
Sabinas Basin include three important plays that produce from fractured formations;
La Virgen, La Casita, and La Gloria have produced a combined 375 Bcfg with
two important new discoveries described.
Both Texas and Mexican data have been utilised, including
well logs illustrating mutual stratigraphic relationships. A comparison of
the productive structures of the Sabinas Basin to well logs and the seismic
definition of a Jurassic wildcat drilled on the southeastern flank of the
San Marcos Arch, suggests that similar productive trends for the South Texas
area may be possible. The Hosston dolomite overlies the Cotton Valley shale,
a proven source rock that is postulated to be within the gas generation window.
Large down-to-the basin growth faults in the area created rollover anticlines,
potential gas targets in fractured upper Sligo to Cotton Valley strata.
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