An Experimental Study of Oil Migration Controlled by Vertical Conduction of Faults and Reservoir Heterogeneity

Abstract

Abstract:

Based on physical simulation experiments, the impacts of conduction capacity of faults and reservoir heterogeneity on the mechanism and patterns of the vertical migration and lateral diversion of oil along faults are researched. The results reveal that the control of conduction capacity of faults and reservoir heterogeneity to oil migration essentially is the coupling control of physical properties (ratios of faults permeability to reservoirs permeability) and charging forces to the vertical migration and lateral diversion of oil. Three patterns, which are controlled by fault with high conduction capacity and reservoirs of inverted rhythm, fault with low conduction capacity and reservoirs of inverted rhythm, or fault with high conduction capacity and reservoirs of positive rhythm, can summarize the coupling control of the two elements to oil migration and distribution. In the first pattern, lateral diversion can hardly occur as the oil migrates vertically along the fault, and oil mostly accumulates in the reservoir beneath the cap rock. In the second pattern, lateral diversion can occur easily as the oil migrates vertically along the fault, and every reservoir can assemble some oil. In the third pattern, lateral diversion can occur more easily as the oil migrates vertically along the fault, and oil mostly accumulates in the lower reservoir with best physical property.

Key words: oil migration, simulation experiment, conduction capacity of fault, reservoir heterogeneity, lateral diversion

CLC Number:

TE122

GUO Kai , ZENG Jian-hui , LU Xue-jun , CUI Zhou-qi , SHI Yu-lei. An Experimental Study of Oil Migration Controlled by Vertical Conduction of Faults and Reservoir Heterogeneity[J]. Geoscience, 2010, 24(6): 1164-1170.

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