Extensional Faulting, Paleodrainage Patterns
and Impact on Hydrocarbon Reservoir Quality and Distribution during
Subsidence: A Case Study from the Cretaceous of Alberta
Marian J. Warren
flexure during tectonic loading and subsidence of the Cretaceous-Tertiary
foreland basin in western
2-D seismic data from the area support the geological model developed from core and well log data. Regional seismic and deep well data indicate that intermittent Cretaceous extensional faulting occurred on a regional scale and that the faults commonly cut basement and Lower Paleozoic strata. However, seismic data also suggest that where Devonian evaporites are present at depth, brittle extensional faulting in the upper part of the section was accommodated at depth by ductile strain within the weaker evaporites.
AAPG Search and Discovery Article #90064©2006-2007 AAPG Distinguished Lecturers