--> Abstract: Representation of Normal Slant Faults in a Two-Dimensional Quantitative Burial History Model, by Z. Yu and I. Lerche; #90987 (1993).
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YU, Z., * IAN LERCHE, and J. LIU, University of South Carolina, Columbia, SC

ABSTRACT: Previous HitRepresentationNext Hit of Normal Slant Faults in a Two-Dimensional Quantitative Burial History Previous HitModelNext Hit

A discussion is given of the impact of normal slant faults on basinal structure, compaction, fluid overpressure development, and thermal effects in sedimentary basins. Faults which are hydraulically closed or open to fluid flow are examined in a dynamical two-dimensional quantitative fluid/flow compaction Previous HitmodelTop.

From this numerical investigation three dominant factors characterize the effects of single and multiple faults with open or closed hydraulic behaviors: (i) there is a difference in excess pressure for fault planes with open or shut hydraulic conditions, but the neighborhood where the effect of the fault is dominant is fairly localized (to within about half a kilometer or so laterally from the fault plane); (ii) the lateral and vertical motion of sediments between faulted blocks induces a thermal difference prior to, during, and post-faulting, which can play a role in influencing hydrocarbon generation, migration, and accumulation; (iii) porosity retention and permeability modification by fault development could influence hydrocarbon exploration decisions regarding sealing, migration athways, and fluid retention.

The general patterns of slant fault effects described here should prevail in most geological situations, because the numerical experiments are designed to illuminate sharply the dominant response characteristics within the framework of simplified situations.

AAPG Search and Discovery Article #90987©1993 AAPG Annual Convention, New Orleans, Louisiana, April 25-28, 1993.