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The AAPG/Datapages Combined Publications Database
CSPG Bulletin
Abstract
Hydrodynamic Pools at Faults
ABSTRACT
Oil and gas pools bounded by faults are commonly thought to be trapped by impermeable rock, either in the fault plane or thrown against it, although hypothetical discussions of trapping by various capillary phenomena have been published. The authors describe several specific examples in which the evidence points to trapping by capillary phenomena (in which is included a rheological effect which is significant in the case of oils with marked visco-elastic properties). An important class of pools singled out by the authors for the first time, comprises those developed at faults, due to hydrodynamic conditions, in beds in which the pressure is lower than hydrostatic and the permeability is relatively low. These pools exist in hydrodynamic disequilibrium as a result of geologically recent differential movements.
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